Release 1.9

Translations update from Weblate

.github/workflows/android.yml

@@ -0,0 +1,33 @@
+name: Android CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build
+      run: ./gradlew assembleRelease
+    - name: Check lint
+      run: ./gradlew lintRelease
+    - name: Run unit tests
+      run: ./gradlew testReleaseUnitTest
+    - name: SpotBugs
+      run: ./gradlew spotbugsRelease
+    - name: Archive test results
+      if: always()
+      uses: actions/upload-artifact@v1
+      with:
+        name: test-results
+        path: app/build/reports

.github/workflows/calibreapp-image-actions.yml

@@ -0,0 +1,31 @@
+name: Compress Images on Push to Master
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '**.jpg'
+      - '**.jpeg'
+      - '**.png'
+      - '**.webp'
+jobs:
+  build:
+    name: calibreapp/image-actions
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@master
+      - name: Compress Images
+        id: calibre
+        uses: calibreapp/image-actions@master
+        with:
+          githubToken: ${{ secrets.GITHUB_TOKEN }}
+          compressOnly: true
+      - name: Create New Pull Request If Needed
+        if: steps.calibre.outputs.markdown != ''
+        uses: peter-evans/create-pull-request@master
+        with:
+          title: Compressed Images
+          branch-suffix: timestamp
+          commit-message: Compressed Images
+          body: ${{ steps.calibre.outputs.markdown }}

.gitignore

@@ -1,8 +1,9 @@
 *.iml
 .gradle
-/local.properties
-/.idea/workspace.xml
-/.idea/libraries
+local.properties
+.idea/
 .DS_Store
-/build
-/captures
+build/
+captures/
+**/release
+**/debug

.travis.yml

@@ -1,16 +0,0 @@
-language: android
-sudo: true
-
-install:
-- echo y | android update sdk -u -a -t tools
-- echo y | android update sdk -u -a -t platform-tools
-- echo y | android update sdk -u -a -t build-tools-26.0.2
-- echo y | android update sdk -u -a -t android-27
-- echo y | android update sdk -u -a -t extra-google-m2repository
-- echo y | android update sdk -u -a -t extra-android-m2repository
-
-script: ./gradlew assembleRelease testReleaseUnitTest lintRelease findbugs
-
-after_failure:
-- cat app/build/reports/findbugs/findbugs.html
-- cat app/build/reports/tests/debug/index.html

CHANGELOG.md

@@ -1,58 +1,378 @@
+# Changelog
+
+## v1.9 (2021-02-22)
+
+Changes:
+
+- Add balance support
+- Reorganize barcode tab of edit view
+
+## v1.8.1 (2021-02-12)
+
+Changes:
+
+- Fix Crash on versions before Android 7
+
+## v1.8 (2021-01-28)
+
+Changes:
+
+- Add support for scaling the barcode when moving to top to fit even more small scanners
+- Fix bottom sheet jumping after switching to fullscreen
+- Make header in loyalty card view small in landscape mode
+- Fix cards not staying in group when group gets renamed
+
+## v1.7.1 (2021-01-18)
+
+Changes:
+
+- Fix crash on switching to barcode tab in edit view if there is no barcode
+
+## v1.7.0 (2021-01-18)
+
+Changes:
+
+- Separate edit UI in tabs to make it feel more spacious
+- Add expiry field support
+
+## v1.6.2 (2021-01-04)
+
+Changes:
+
+- Fix edit button or more info bottom sheet drawing over barcode ID
+
+## v1.6.1 (2020-12-16)
+
+Changes:
+
+- Fix regression causing manual barcode entry to not be saved
+
+## v1.6.0 (2020-12-15)
+
+Changes:
+
+- Automatically focus text field when creating or editing a group
+- Fix blurry icons (use SVG everywhere)
+- Always open camera but add manual scan button to camera view
+
+## v1.5.1 (2020-12-03)
+
+Changes:
+
+- Fix bottomsheet background being transparent
+
+## v1.5.0 (2020-12-03)
+
+Changes:
+
+- Improve contrast by always using white text on red buttons
+- Draggable bottom sheet in loyalty card view
+
+## v1.4.1 (2020-12-01)
+
+Changes:
+
+- Improved translations
+- Small UI fixes
+
+## v1.4.0 (2020-11-28)
+
+Changes:
+
+- Move About screen into its own activity
+- Ask user if they want to use their camera or manually enter ID on add/edit card
+- Make group ordering manual instead of forced alphabetically
+
+## v1.3.0 (2020-11-22)
+
+Changes:
+
+- Always show all import/export options and show a toast on actual issues (improves compat with XPrivacyLua)
+- Ask for confirmation when leaving edit view after making changes without saving
+
+## v1.2.2 (2020-11-19)
+
+Changes:
+
+- Remember active group tab between screens and sessions
+
+## v1.2.1 (2020-11-17)
+
+Changes:
+
+- Fix home screen swiping triggering during vertical swipes too
+
+## v1.2.0 (2020-11-17)
+
+Changes:
+
+- Add swiping between groups on the home screen
+- Fix crash with cards lacking header colour
+
+## v1.1.0 (2020-11-11)
+
+Changes:
+
+- Improved edit UI
+- Removed header text colour option (now automatically generated based on brightness)
+- Updated translations
+
+## v1.0.1 (2020-11-07)
+
+Changes:
+
+- Fix crash in search with no groups
+
+## v1.0 (2020-11-06)
+
+Changes:
+
+- Added rounded edges to card icons on main overview
+- Added support for grouping entries
+
+## v0.29 (2020-10-29)
+
+Changes:
+
+- Rebrand to Catima
+- Removed intro
+- Add floating action buttons
+- Fix Android 5 crash when opening About screen
+- Add favourites support
+- Fix disabled auto-rotate being ignored
+
+## v0.28 (2020-03-09)
+
+Changes:
+
+- Fix barcode centering when exiting full screen ([#351](https://github.com/brarcher/loyalty-card-locker/pull/351))
+- Allow backup export location to be selected ([#352](https://github.com/brarcher/loyalty-card-locker/pull/352))
+- Update translations ([#357](https://github.com/brarcher/loyalty-card-locker/pull/357)) & ([#362](https://github.com/brarcher/loyalty-card-locker/pull/362))
+
+## v0.27 (2020-01-26)
+
+Changes:
+
+- Tapping on a barcode now moves it to the top of the screen ([#348](https://github.com/brarcher/loyalty-card-locker/pull/348))
+- Add white space around barcodes to improve scanning in dark mode ([#328](https://github.com/brarcher/loyalty-card-locker/issues/328))
+- Fix swapped import buttons. ([#346](https://github.com/brarcher/loyalty-card-locker/pull/346))
+
+## v0.26.1 (2020-01-09)
+
+Changes:
+
+- Fix issue with sharing cards without background color ([#343](https://github.com/brarcher/loyalty-card-locker/pull/343))
+
+## v0.26 (2020-01-05)
+
+Changes:
+
+- Add ability to search for a card ([#320](https://github.com/brarcher/loyalty-card-locker/pull/320))
+- Add ability to share and receive loyalty cards ([#321](https://github.com/brarcher/loyalty-card-locker/pull/321))
+- Dark mode support ([#322](https://github.com/brarcher/loyalty-card-locker/pull/322))
+- Loyalty cards can now be barcodeless (e.g. not have a barcode) ([#324](https://github.com/brarcher/loyalty-card-locker/pull/324))
+- Notes can span multiple lines ([#326](https://github.com/brarcher/loyalty-card-locker/pull/326))
+- Improvements with the sizing of notes ([#319](https://github.com/brarcher/loyalty-card-locker/pull/319))
+- Improve notification and app icon visibility ([#330](https://github.com/brarcher/loyalty-card-locker/pull/330))
+- Update target SDK to Android 10
+- Improve the following translations:
+  - German
+  - Italian
+  - Dutch
+  - Polish
+  - Russian
+
+## v0.25.4 (2019-10-04)
+
+Changes:
+
+- Enable app backups
+- Update French and Slovenian translations
+
+## v0.25.3 (2019-03-02)
+
+Changes:
+
+- Update Russian translations
+
+## v0.25.2 (2019-01-05)
+
+Changes:
+
+- Update and add translations
+
+## v0.25.1 (2018-10-14)
+
+Changes:
+
+- Fix creating new card by manually entering barcode ([issue #272](https://github.com/brarcher/loyalty-card-locker/issues/272))
+
+## v0.25 (2018-10-07)
+
+Changes:
+
+- Sort card list case insensitive ([pull #266](https://github.com/brarcher/loyalty-card-locker/pull/266))
+- Add setting to lock orientation for all cards ([pull #269](https://github.com/brarcher/loyalty-card-locker/pull/269)
+
+## v0.24 (2018-07-31)
+
+Changes:
+
+- Add a setting to control screen brightness when displaying a barcode ([pull #259](https://github.com/brarcher/loyalty-card-locker/pull/259))
+- Add Greek translations ([pull #252](https://github.com/brarcher/loyalty-card-locker/pull/252))
+- Add Slovenian translations ([pull #260](https://github.com/brarcher/loyalty-card-locker/pull/260))
+- Update translations ([pull #260](https://github.com/brarcher/loyalty-card-locker/pull/260), [pull #254](https://github.com/brarcher/loyalty-card-locker/pull/254))
+
+## v0.23.4 (2018-05-12)
+
+Changes:
+
+- Fix Spanish translations ([pull #244](https://github.com/brarcher/loyalty-card-locker/pull/244))
+- Update translations ([pull #244](https://github.com/brarcher/loyalty-card-locker/pull/244))
+
+## v0.23.3 (2018-05-05)
+
+Changes:
+
+- Added translations
+  - Polish ([pull #232](https://github.com/brarcher/loyalty-card-locker/pull/232))
+  - Spanish ([pull #232](https://github.com/brarcher/loyalty-card-locker/pull/232))
+  - Slovak ([pull #232](https://github.com/brarcher/loyalty-card-locker/pull/232))
+- Updated translations ([pull #239](https://github.com/brarcher/loyalty-card-locker/pull/239))
+
+## v0.23.2 (2018-03-11)
+
+Changes:
+
+- Reduce min SDK from 17 to 15. ([pull #226](https://github.com/brarcher/loyalty-card-locker/pull/226))
+- Remove usage of legacy apache library, used only in unit tests but no longer needed. ([pull #225](https://github.com/brarcher/loyalty-card-locker/pull/225))
+
+## v0.23.1 (2018-03-07)
+
+Changes:
+
+- Prevent crash when rendering a barcode exhausts the application's memory. ([pull #219](https://github.com/brarcher/loyalty-card-locker/pull/219))
+
+## v0.23 (2018-02-28)
+
+Changes:
+
+- Reduce space in header when viewing a card. ([pull #213](https://github.com/brarcher/loyalty-card-locker/pull/213))
+- Disable beep when scanning a barcode. ([pull #216](https://github.com/brarcher/loyalty-card-locker/pull/216))
+
+## v0.22 (2018-02-19)
+
+Changes:
+
+- Update translations. ([pull #208](https://github.com/brarcher/loyalty-card-locker/pull/208))
+- Barcode rendering updates: ([pull #209](https://github.com/brarcher/loyalty-card-locker/pull/209))
+  - Reload card view activity when screen is rotated, so barcode image is correct size.
+  - Render 1D barcodes in a larger space, allowing them to better fill the screen.
+
+## v0.21 (2018-02-17)
+
+Changes:
+
+- Add quiet space at the start/end of barcodes. ([pull #200](https://github.com/brarcher/loyalty-card-locker/pull/200))
+- Add options to configure the colors used for the store name font and background. ([pull #203](https://github.com/brarcher/loyalty-card-locker/pull/203))
+- Add options to adjust font sizes on the card listing page and single card page. ([pull #204](https://github.com/brarcher/loyalty-card-locker/pull/204))
+
+## v0.20 (2018-02-10)
+
+Changes:
+
+- Changes to Card view to display the note, allow the card ID to take multiple lines, and show the store name. ([pull #197](https://github.com/brarcher/loyalty-card-locker/pull/197))
+
+## v0.19 (2018-02-01)
+
+Changes:
+
+- Improved layout for card list. ([pull #188](https://github.com/brarcher/loyalty-card-locker/pull/188))
+- Improved layout when viewing a card. ([pull #190](https://github.com/brarcher/loyalty-card-locker/pull/190))
+
+## v0.18.1 (2018-01-24)
+
+Changes:
+
+- Workaround crash during install on some Android versions (likely Android 5 and below). ([pull #184](https://github.com/brarcher/loyalty-card-locker/pull/184))
+
+## v0.18 (2018-01-19)
+
+Changes:
+
+- Fix crash when importing certain types of corrupted CSV files. ([pull #177](https://github.com/brarcher/loyalty-card-locker/pull/177))
+- Fix importing backups directly from the file system. ([pull #180](https://github.com/brarcher/loyalty-card-locker/pull/180))
+- Fix importing backups from certain types of content providers. ([pull #179](https://github.com/brarcher/loyalty-card-locker/pull/179))
+
+## v0.17 (2018-01-11)
+
+Changes:
+
+- Fix issue on Android SDK 24+ where using the file chooser import option would cause a crash. ([pull #170](https://github.com/brarcher/loyalty-card-locker/pull/170))
+- New icon and color scheme. ([pull #171](https://github.com/brarcher/loyalty-card-locker/pull/171))
+
 ## v0.16 (2017-11-29)
 
 Changes:
-- Add support for adding loyalty card shortcuts from the launcher/homescreen. (https://github.com/brarcher/loyalty-card-locker/pull/161)
-- Remove support for adding loyalty card shortcuts from the app itself. This removes the need for the shortcut permission. (https://github.com/brarcher/loyalty-card-locker/pull/163)
+
+- Add support for adding loyalty card shortcuts from the launcher/homescreen. ([pull #161](https://github.com/brarcher/loyalty-card-locker/pull/161))
+- Remove support for adding loyalty card shortcuts from the app itself. This removes the need for the shortcut permission. ([pull #163](https://github.com/brarcher/loyalty-card-locker/pull/163))
 
 ## v0.15 (2017-11-25)
 
 Changes:
-- Add support for adding shortcuts to home screen when adding or editing a card. (https://github.com/brarcher/loyalty-card-locker/pull/155)
-- Remove widget, as it was a poor substitute for shortcuts. (https://github.com/brarcher/loyalty-card-locker/pull/155)
-- Fix exporting backups on Android 7+. (https://github.com/brarcher/loyalty-card-locker/pull/153)
-- Report more accurate mime type when exporting backup data. (https://github.com/brarcher/loyalty-card-locker/pull/156)
-- Fix bug where a card could not be edited. (https://github.com/brarcher/loyalty-card-locker/pull/155)
+
+- Add support for adding shortcuts to home screen when adding or editing a card. ([pull #155](https://github.com/brarcher/loyalty-card-locker/pull/155))
+- Remove widget, as it was a poor substitute for shortcuts. ([pull #155](https://github.com/brarcher/loyalty-card-locker/pull/155))
+- Fix exporting backups on Android 7+. ([pull #153](https://github.com/brarcher/loyalty-card-locker/pull/153))
+- Report more accurate mime type when exporting backup data. ([pull #156](https://github.com/brarcher/loyalty-card-locker/pull/156))
+- Fix bug where a card could not be edited. ([pull #155](https://github.com/brarcher/loyalty-card-locker/pull/155))
 
 ## v0.14 (2017-10-26)
 
 Changes:
-- Add support for app shortcuts (Android 7.1+), where the most recently used cards will appear as shortcuts. (https://github.com/brarcher/loyalty-card-locker/pull/145)
-- Add a widget which works like a pinned app shortcut, to support devices which run below Android 7.1. (https://github.com/brarcher/loyalty-card-locker/pull/142)
+
+- Add support for app shortcuts (Android 7.1+), where the most recently used cards will appear as shortcuts. ([pull #145](https://github.com/brarcher/loyalty-card-locker/pull/145))
+- Add a widget which works like a pinned app shortcut, to support devices which run below Android 7.1. ([pull #142](https://github.com/brarcher/loyalty-card-locker/pull/142))
 
 ## v0.13 (2017-07-25)
 
 Changes:
-- Add screen rotation lock menu option when displaying a card. If locked, the screen will transition to its "natural" orientation and further screen rotation will be blocked. (https://github.com/brarcher/loyalty-card-locker/pull/128)
-- If a card is selected from the main screen but cannot be loaded, the application fails gracefully and posts a message. (https://github.com/brarcher/loyalty-card-locker/pull/132)
-- Fix case where layout IDs for intro wizard could not be found. (https://github.com/brarcher/loyalty-card-locker/pull/128)
+
+- Add screen rotation lock menu option when displaying a card. If locked, the screen will transition to its "natural" orientation and further screen rotation will be blocked. ([pull #128](https://github.com/brarcher/loyalty-card-locker/pull/128))
+- If a card is selected from the main screen but cannot be loaded, the application fails gracefully and posts a message. ([pull #132](https://github.com/brarcher/loyalty-card-locker/pull/132))
+- Fix case where layout IDs for intro wizard could not be found. ([pull #128](https://github.com/brarcher/loyalty-card-locker/pull/128))
 
 ## v0.12 (2017-07-16)
 
 Changes:
 
-- A change in v0.11 reduced the memory usage of barcode drawing, but affected the barcode dimensions. This is now changed to maintain the barcode dimensions while reducing memory usage. (https://github.com/brarcher/loyalty-card-locker/pull/126)
-- Update German and French translations. (https://github.com/brarcher/loyalty-card-locker/pull/122, https://github.com/brarcher/loyalty-card-locker/pull/124, https://github.com/brarcher/loyalty-card-locker/pull/125)
+- A change in v0.11 reduced the memory usage of barcode drawing, but affected the barcode dimensions. This is now changed to maintain the barcode dimensions while reducing memory usage. ([pull #126](https://github.com/brarcher/loyalty-card-locker/pull/126))
+- Update German and French translations. ([pull #122](https://github.com/brarcher/loyalty-card-locker/pull/122), [pull #124](https://github.com/brarcher/loyalty-card-locker/pull/124), [pull #125](https://github.com/brarcher/loyalty-card-locker/pull/125))
 
 ## v0.11.1 (2017-06-29)
 
 Changes:
+
 - Prevent a crash when rotation the screen in the first run intro wizard.
 
 ## v0.11 (2017-06-26)
 
 Improvements:
-- When editing a card ID, pre-populate the existing ID to start. (https://github.com/brarcher/loyalty-card-locker/pull/94)
-- Limit the width of generated barcodes to reduce memory usage and out of memory errors. (https://github.com/brarcher/loyalty-card-locker/pull/103)
-- When editing a card, change the "Enter Card" button to say "Edit Card" if a card ID already exists. (https://github.com/brarcher/loyalty-card-locker/pull/104)
-- Change the color scheme to be softer and compatible with the app icon, and change the layout when viewing a card to be cleaner. (https://github.com/brarcher/loyalty-card-locker/pull/107)
-- Add an intro wizard which launches on the app's first launch. (https://github.com/brarcher/loyalty-card-locker/pull/108)
+
+- When editing a card ID, pre-populate the existing ID to start. ([pull #94](https://github.com/brarcher/loyalty-card-locker/pull/94))
+- Limit the width of generated barcodes to reduce memory usage and out of memory errors. ([pull #103](https://github.com/brarcher/loyalty-card-locker/pull/103))
+- When editing a card, change the "Enter Card" button to say "Edit Card" if a card ID already exists. ([pull #104](https://github.com/brarcher/loyalty-card-locker/pull/104))
+- Change the color scheme to be softer and compatible with the app icon, and change the layout when viewing a card to be cleaner. ([pull #107](https://github.com/brarcher/loyalty-card-locker/pull/107))
+- Add an intro wizard which launches on the app's first launch. ([pull #108](https://github.com/brarcher/loyalty-card-locker/pull/108))
 
 ## v0.10 (2017-02-12)
 
 Improvements:
-- Changed the default import/export filename. (https://github.com/brarcher/loyalty-card-locker/pull/84)
-- Correct string on the import/export page. (https://github.com/brarcher/loyalty-card-locker/pull/87)
-- Improve layout of card view page. The text should be easier to read, and is selectable with a long click. (https://github.com/brarcher/loyalty-card-locker/pull/91)
+
+- Changed the default import/export filename. ([pull #84](https://github.com/brarcher/loyalty-card-locker/pull/84))
+- Correct string on the import/export page. ([pull #87](https://github.com/brarcher/loyalty-card-locker/pull/87))
+- Improve layout of card view page. The text should be easier to read, and is selectable with a long click. ([pull #91](https://github.com/brarcher/loyalty-card-locker/pull/91))
 
 ## v0.9 (2017-01-17)
 
@@ -60,43 +380,50 @@ The "Locker" part of the name was not intuitive. To help remedy this a new appli
 
 Additional features/improvements:
 
-- Importing/Exporting cards was changed to be more flexible. (https://github.com/brarcher/loyalty-card-locker/pull/76)
-- Translations for Lithuanian added. (https://github.com/brarcher/loyalty-card-locker/pull/62)
-- Translations for French added. (https://github.com/brarcher/loyalty-card-locker/pull/80)
+- Importing/Exporting cards was changed to be more flexible. ([pull #76](https://github.com/brarcher/loyalty-card-locker/pull/76))
+- Translations for Lithuanian added. ([pull #62](https://github.com/brarcher/loyalty-card-locker/pull/62))
+- Translations for French added. ([pull #80](https://github.com/brarcher/loyalty-card-locker/pull/80))
 
 ## v0.8 (2016-11-22)
 
 New features/improvements:
-- Screen brightness increased to its maximum when displaying a card, to help barcode scanners successfully capture the barcode. (https://github.com/brarcher/loyalty-card-locker/pull/54)
-- Add a delete confirmation when deleting a card. (https://github.com/brarcher/loyalty-card-locker/pull/55)
-- Add translations for German (https://github.com/brarcher/loyalty-card-locker/pull/57) and Czech (https://github.com/brarcher/loyalty-card-locker/pull/58).
-- Clarification change for Italian translation. (https://github.com/brarcher/loyalty-card-locker/pull/66)
+
+- Screen brightness increased to its maximum when displaying a card, to help barcode scanners successfully capture the barcode. ([pull #54](https://github.com/brarcher/loyalty-card-locker/pull/54))
+- Add a delete confirmation when deleting a card. ([pull #55](https://github.com/brarcher/loyalty-card-locker/pull/55))
+- Add translations for German ([pull #57](https://github.com/brarcher/loyalty-card-locker/pull/57)) and Czech ([pull #58](https://github.com/brarcher/loyalty-card-locker/pull/58)).
+- Clarification change for Italian translation. ([pull #66](https://github.com/brarcher/loyalty-card-locker/pull/66))
 
 ## v0.7 (2016-07-14)
 
 New features/improvements:
-- Long-click of a card brings up option to copy card ID to the clipboard. (https://github.com/brarcher/loyalty-card-locker/issues/49)
+
+- Long-click of a card brings up option to copy card ID to the clipboard. ([pull #49](https://github.com/brarcher/loyalty-card-locker/issues/49))
 
 Bug fixes:
+
 - Back button on Input/Export view now works, moving user to main view
 
 ## v0.6 (2016-05-23)
 
 New features/improvements:
-- Allow user to enter barcode manually. If a user elects to enter a barcode manually, a list of all valid and supported barcode images is displayed. The user then may select the barcode image which matches what the user wants. https://github.com/brarcher/loyalty-card-locker/issues/33, https://github.com/brarcher/loyalty-card-locker/pull/44 
+
+- Allow user to enter barcode manually. If a user elects to enter a barcode manually, a list of all valid and supported barcode images is displayed. The user then may select the barcode image which matches what the user wants. [issue #33](https://github.com/brarcher/loyalty-card-locker/issues/33), [pull #44](https://github.com/brarcher/loyalty-card-locker/pull/44)
 
 Bug fixes:
-- Resolve issue where some displayed barcodes were blurry. (https://github.com/brarcher/loyalty-card-locker/issues/37)
+
+- Resolve issue where some displayed barcodes were blurry. ([issue #37](https://github.com/brarcher/loyalty-card-locker/issues/37))
 
 ## v0.5 (2016-05-16)
 
 New features/improvements:
-- An about dialog can be opened from the main screen, which gives details about the application and project on GitHub (https://github.com/brarcher/loyalty-card-locker/issues/19)
-- Allow loyalty card information to be imported from/exported to a CSV file in external storage (https://github.com/brarcher/loyalty-card-locker/issues/36 https://github.com/brarcher/loyalty-card-locker/issues/20)
+
+- An about dialog can be opened from the main screen, which gives details about the application and project on GitHub ([issue #19](https://github.com/brarcher/loyalty-card-locker/issues/19))
+- Allow loyalty card information to be imported from/exported to a CSV file in external storage ([issue #36](https://github.com/brarcher/loyalty-card-locker/issues/36), [issue #20](https://github.com/brarcher/loyalty-card-locker/issues/20))
 
 ## v0.4 (2016-04-09)
 
 New features/improvements:
+
 - Dutch translation
 - Allow name field to be editable after adding loyalty card
 - Add an optional note field
@@ -108,17 +435,18 @@ Bug fixes:
 ## v0.3 (2016-02-11)
 
 - Now officially supports the following list of 1D and 2D barcodes:
-  * AZTEC
-  * CODABAR
-  * CODE_39
-  * CODE_128
-  * DATA_MATRIX
-  * EAN_8
-  * EAN_13
-  * ITF
-  * PDF_417
-  * QR_CODE
- * UPC_A
+  - AZTEC
+  - CODABAR
+  - CODE_39
+  - CODE_128
+  - DATA_MATRIX
+  - EAN_8
+  - EAN_13
+  - ITF
+  - PDF_417
+  - QR_CODE
+  - UPC_A
+
 - Generated barcodes are larger, easier to scan from a scanning device
 
 ## v0.2 (2016-02-07)
@@ -127,7 +455,6 @@ Bug fixes:
 - Support for all 1D barcode types. (Originally only product 1D barcodes were supported)
 - Add required camera permission, which was initially missing.
 
-
 ## v0.1 (2016-01-30)
 
 - Ability to create/edit/delete loyalty cards

CONTRIBUTING.md

@@ -0,0 +1,91 @@
+How to Submit Patches to the Loyalty Card Keychain Project
+===============================================================================
+https://github.com/brarcher/budget-watch
+
+This document is intended to act as a guide to help you contribute to the
+Loyalty Card Keychain project.  It is not perfect, and there will always be exceptions
+to the rules described here, but by following the instructions below you
+should have a much easier time getting your work merged with the upstream
+project.
+
+## Test Your Code
+
+There are four possible tests you can run to verify your code.  The first
+is unit tests, which check the basic functionality of the application, and
+can be run by gradle using:
+
+    # ./gradlew testReleaseUnitTest
+
+The second and third check for common problems using static analysis.
+These are the Android lint checker, run using:
+
+    # ./gradlew lintRelease
+
+and FindBugs, run using:
+
+    # ./gradlew findbugs
+
+The final check is by testing the application on a live device and verifying
+the basic functionality works as expected.
+
+## Make Sure Your Code is Tested
+
+The Loyalty Card Keychain code uses a fair number of unit tests to verify that
+the basic functionality is working. Submissions which add functionality
+or significantly change the existing code should include additional tests
+to verify the proper operation of the proposed changes.
+
+## Explain Your Work
+
+At the top of every patch you should include a description of the problem you
+are trying to solve, how you solved it, and why you chose the solution you
+implemented.  If you are submitting a bug fix, it is also incredibly helpful
+if you can describe/include a reproducer for the problem in the description as
+well as instructions on how to test for the bug and verify that it has been
+fixed.
+
+## Sign Your Work
+
+The sign-off is a simple line at the end of the patch description, which
+certifies that you wrote it or otherwise have the right to pass it on as an
+open-source patch.  The "Developer's Certificate of Origin" pledge is taken
+from the Linux Kernel and the rules are pretty simple:
+
+	Developer's Certificate of Origin 1.1
+
+	By making a contribution to this project, I certify that:
+
+	(a) The contribution was created in whole or in part by me and I
+	    have the right to submit it under the open source license
+	    indicated in the file; or
+
+	(b) The contribution is based upon previous work that, to the best
+	    of my knowledge, is covered under an appropriate open source
+	    license and I have the right under that license to submit that
+	    work with modifications, whether created in whole or in part
+	    by me, under the same open source license (unless I am
+	    permitted to submit under a different license), as indicated
+	    in the file; or
+
+	(c) The contribution was provided directly to me by some other
+	    person who certified (a), (b) or (c) and I have not modified
+	    it.
+
+	(d) I understand and agree that this project and the contribution
+	    are public and that a record of the contribution (including all
+	    personal information I submit with it, including my sign-off) is
+	    maintained indefinitely and may be redistributed consistent with
+	    this project or the open source license(s) involved.
+
+... then you just add a line to the bottom of your patch description, with
+your real name, saying:
+
+	Signed-off-by: Random J Developer <random@developer.example.org>
+
+## Submit Patch(es) for Review
+
+Finally, you will need to submit your patches so that they can be reviewed
+and potentially merged into the main Loyalty Card Keychain repository. The preferred
+way to do this is to submit a Pull Request to the Loyalty Card Keychain project.
+Changes need to apply cleanly onto the master branch and pass all
+unit tests and produce no errors during static analysis.

Gemfile

@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "fastlane"

Gemfile.lock

@@ -0,0 +1,180 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    CFPropertyList (3.0.2)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    atomos (0.1.3)
+    aws-eventstream (1.1.0)
+    aws-partitions (1.388.0)
+    aws-sdk-core (3.109.1)
+      aws-eventstream (~> 1, >= 1.0.2)
+      aws-partitions (~> 1, >= 1.239.0)
+      aws-sigv4 (~> 1.1)
+      jmespath (~> 1.0)
+    aws-sdk-kms (1.39.0)
+      aws-sdk-core (~> 3, >= 3.109.0)
+      aws-sigv4 (~> 1.1)
+    aws-sdk-s3 (1.83.1)
+      aws-sdk-core (~> 3, >= 3.109.0)
+      aws-sdk-kms (~> 1)
+      aws-sigv4 (~> 1.1)
+    aws-sigv4 (1.2.2)
+      aws-eventstream (~> 1, >= 1.0.2)
+    babosa (1.0.4)
+    claide (1.0.3)
+    colored (1.2)
+    colored2 (3.1.2)
+    commander-fastlane (4.4.6)
+      highline (~> 1.7.2)
+    declarative (0.0.20)
+    declarative-option (0.1.0)
+    digest-crc (0.6.1)
+      rake (~> 13.0)
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
+    dotenv (2.7.6)
+    emoji_regex (3.2.0)
+    excon (0.78.0)
+    faraday (1.1.0)
+      multipart-post (>= 1.2, < 3)
+      ruby2_keywords
+    faraday-cookie_jar (0.0.7)
+      faraday (>= 0.8.0)
+      http-cookie (~> 1.0.0)
+    faraday_middleware (1.0.0)
+      faraday (~> 1.0)
+    fastimage (2.2.0)
+    fastlane (2.165.0)
+      CFPropertyList (>= 2.3, < 4.0.0)
+      addressable (>= 2.3, < 3.0.0)
+      aws-sdk-s3 (~> 1.0)
+      babosa (>= 1.0.3, < 2.0.0)
+      bundler (>= 1.12.0, < 3.0.0)
+      colored
+      commander-fastlane (>= 4.4.6, < 5.0.0)
+      dotenv (>= 2.1.1, < 3.0.0)
+      emoji_regex (>= 0.1, < 4.0)
+      excon (>= 0.71.0, < 1.0.0)
+      faraday (~> 1.0)
+      faraday-cookie_jar (~> 0.0.6)
+      faraday_middleware (~> 1.0)
+      fastimage (>= 2.1.0, < 3.0.0)
+      gh_inspector (>= 1.1.2, < 2.0.0)
+      google-api-client (>= 0.37.0, < 0.39.0)
+      google-cloud-storage (>= 1.15.0, < 2.0.0)
+      highline (>= 1.7.2, < 2.0.0)
+      json (< 3.0.0)
+      jwt (>= 2.1.0, < 3)
+      mini_magick (>= 4.9.4, < 5.0.0)
+      multipart-post (~> 2.0.0)
+      plist (>= 3.1.0, < 4.0.0)
+      rubyzip (>= 2.0.0, < 3.0.0)
+      security (= 0.1.3)
+      simctl (~> 1.6.3)
+      slack-notifier (>= 2.0.0, < 3.0.0)
+      terminal-notifier (>= 2.0.0, < 3.0.0)
+      terminal-table (>= 1.4.5, < 2.0.0)
+      tty-screen (>= 0.6.3, < 1.0.0)
+      tty-spinner (>= 0.8.0, < 1.0.0)
+      word_wrap (~> 1.0.0)
+      xcodeproj (>= 1.13.0, < 2.0.0)
+      xcpretty (~> 0.3.0)
+      xcpretty-travis-formatter (>= 0.0.3)
+    gh_inspector (1.1.3)
+    google-api-client (0.38.0)
+      addressable (~> 2.5, >= 2.5.1)
+      googleauth (~> 0.9)
+      httpclient (>= 2.8.1, < 3.0)
+      mini_mime (~> 1.0)
+      representable (~> 3.0)
+      retriable (>= 2.0, < 4.0)
+      signet (~> 0.12)
+    google-cloud-core (1.5.0)
+      google-cloud-env (~> 1.0)
+      google-cloud-errors (~> 1.0)
+    google-cloud-env (1.4.0)
+      faraday (>= 0.17.3, < 2.0)
+    google-cloud-errors (1.0.1)
+    google-cloud-storage (1.29.1)
+      addressable (~> 2.5)
+      digest-crc (~> 0.4)
+      google-api-client (~> 0.33)
+      google-cloud-core (~> 1.2)
+      googleauth (~> 0.9)
+      mini_mime (~> 1.0)
+    googleauth (0.14.0)
+      faraday (>= 0.17.3, < 2.0)
+      jwt (>= 1.4, < 3.0)
+      memoist (~> 0.16)
+      multi_json (~> 1.11)
+      os (>= 0.9, < 2.0)
+      signet (~> 0.14)
+    highline (1.7.10)
+    http-cookie (1.0.3)
+      domain_name (~> 0.5)
+    httpclient (2.8.3)
+    jmespath (1.4.0)
+    json (2.3.1)
+    jwt (2.2.2)
+    memoist (0.16.2)
+    mini_magick (4.10.1)
+    mini_mime (1.0.2)
+    multi_json (1.15.0)
+    multipart-post (2.0.0)
+    nanaimo (0.3.0)
+    naturally (2.2.0)
+    os (1.1.1)
+    plist (3.5.0)
+    public_suffix (4.0.6)
+    rake (13.0.1)
+    representable (3.0.4)
+      declarative (< 0.1.0)
+      declarative-option (< 0.2.0)
+      uber (< 0.2.0)
+    retriable (3.1.2)
+    rouge (2.0.7)
+    ruby2_keywords (0.0.2)
+    rubyzip (2.3.0)
+    security (0.1.3)
+    signet (0.14.0)
+      addressable (~> 2.3)
+      faraday (>= 0.17.3, < 2.0)
+      jwt (>= 1.5, < 3.0)
+      multi_json (~> 1.10)
+    simctl (1.6.8)
+      CFPropertyList
+      naturally
+    slack-notifier (2.3.2)
+    terminal-notifier (2.0.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    tty-cursor (0.7.1)
+    tty-screen (0.8.1)
+    tty-spinner (0.9.3)
+      tty-cursor (~> 0.7)
+    uber (0.1.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.7)
+    unicode-display_width (1.7.0)
+    word_wrap (1.0.0)
+    xcodeproj (1.19.0)
+      CFPropertyList (>= 2.3.3, < 4.0)
+      atomos (~> 0.1.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.3.0)
+    xcpretty (0.3.0)
+      rouge (~> 2.0.7)
+    xcpretty-travis-formatter (1.0.0)
+      xcpretty (~> 0.2, >= 0.0.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  fastlane
+
+BUNDLED WITH
+   2.1.4

README.md

@@ -1,58 +0,0 @@
-# Loyalty Card Keychain
-[![Build Status](https://travis-ci.org/brarcher/loyalty-card-locker.svg?branch=master)](https://travis-ci.org/brarcher/loyalty-card-locker)
-
-<a href="https://f-droid.org/repository/browse/?fdid=protect.card_locker" target="_blank">
-<img src="https://f-droid.org/badge/get-it-on.png" alt="Get it on F-Droid" height="90"/></a>
-<a href="https://play.google.com/store/apps/details?id=protect.card_locker" target="_blank">
-<img src="https://play.google.com/intl/en_us/badges/images/generic/en-play-badge.png" alt="Get it on Google Play" height="90"/></a>
-
-Stores all of your store loyalty cards on your phone, removing the need to carry them around.  Currently the following barcode types are supported:
-
-- AZTEC
-- CODABAR
-- CODE_39
-- CODE_128
-- DATA_MATRIX
-- EAN_8
-- EAN_13
-- ITF
-- PDF_417
-- QR_CODE
-- UPC_A
-
-If there is any interest in improving this project, kindly submit a pull request with
-proposed changes.
-
-# Screenshots
-
-[<img src="https://user-images.githubusercontent.com/5264535/27416124-79b09162-56d9-11e7-967b-8923177dc228.png" width=250>](https://user-images.githubusercontent.com/5264535/27416124-79b09162-56d9-11e7-967b-8923177dc228.png)
-[<img src="https://user-images.githubusercontent.com/5264535/27416127-7baea332-56d9-11e7-8a10-5be90bb02225.png" width=250>](https://user-images.githubusercontent.com/5264535/27416127-7baea332-56d9-11e7-8a10-5be90bb02225.png)
-[<img src="https://user-images.githubusercontent.com/5264535/27416128-7d50f7b2-56d9-11e7-9833-1dd962f9cf66.png" width=250>](https://user-images.githubusercontent.com/5264535/27416128-7d50f7b2-56d9-11e7-9833-1dd962f9cf66.png)
-
-[<img src="https://user-images.githubusercontent.com/5264535/27416132-7ea6272c-56d9-11e7-9a52-d73424bf902c.png" width=250>](https://user-images.githubusercontent.com/5264535/27416132-7ea6272c-56d9-11e7-9a52-d73424bf902c.png)
-[<img src="https://user-images.githubusercontent.com/5264535/27416137-800aee90-56d9-11e7-9cc9-2a7dc63bb4fb.png" width=250>](https://user-images.githubusercontent.com/5264535/27416137-800aee90-56d9-11e7-9cc9-2a7dc63bb4fb.png)
-[<img src="https://user-images.githubusercontent.com/5264535/27416140-82d8211a-56d9-11e7-8031-c71d3077bdc6.png" width=250>](https://user-images.githubusercontent.com/5264535/27416140-82d8211a-56d9-11e7-8031-c71d3077bdc6.png)
-
-# Building
-
-To build, use the gradle wrapper scripts provided in the top level directory of the project. The following will
-compile the application and run all unit tests:
-
-GNU/Linux, OSX, UNIX:
-```
-./gradlew build
-```
-
-Windows:
-```
-./gradlew.bat build
-```
-
-# Translating
-
-If you are interested in translating this application to another language, create a pull request with changes or find the project listing on  [Transifex](https://www.transifex.com/na-243/loyalty-card-locker).
-
-# Thanks
-
-This application uses the following image:
-- [Save](https://thenounproject.com/term/save/716011) by [Bernar Novalyi](https://thenounproject.com/bernar.novalyi)

app/.gitignore

@@ -1 +0,0 @@
-/build

app/build.gradle

@@ -1,71 +1,97 @@
-apply plugin: 'com.android.application'
-apply plugin: 'findbugs'
+import com.github.spotbugs.snom.SpotBugsTask
 
-findbugs {
-    sourceSets = []
+apply plugin: 'com.android.application'
+apply plugin: 'com.github.spotbugs'
+
+spotbugs {
     ignoreFailures = false
+    effort = 'max'
+    excludeFilter = file("./config/spotbugs/exclude.xml")
+    reportsDir = file("$buildDir/reports/spotbugs/")
 }
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 29
+    buildToolsVersion "30.0.3"
 
     defaultConfig {
-        applicationId "protect.card_locker"
-        minSdkVersion 17
-        targetSdkVersion 27
-        versionCode 18
-        versionName "0.17"
+        applicationId "me.hackerchick.catima"
+        minSdkVersion 19
+        targetSdkVersion 29
+        versionCode 59
+        versionName "1.9"
+
+        vectorDrawables.useSupportLibrary true
     }
+
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            resValue "string", "app_name", "Catima"
+        }
+        debug {
+            applicationIdSuffix ".debug"
+            resValue "string", "app_name", "Catima Debug"
         }
     }
+
+    compileOptions {
+        encoding "UTF-8"
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     lintOptions {
-        disable "GoogleAppIndexingWarning"
-        disable "ButtonStyle"
-        disable "AlwaysShowAction"
-        disable "MissingTranslation"
+        disable "GoogleAppIndexingWarning", "ButtonStyle", "AlwaysShowAction",
+                "MissingTranslation", "MissingPrefix"
     }
 
     // Starting with Android Studio 3 Robolectric is unable to find resources.
     // The following allows it to find the resources.
     testOptions {
         unitTests {
-            includeAndroidResources = true
+            all {
+                testLogging {
+                    events 'started', 'passed', 'skipped', 'failed'
+                }
+            }
+            includeAndroidResources true
         }
     }
-
-    // This is for Robolectric support for SDK 23
-    useLibrary 'org.apache.http.legacy'
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:27.0.2'
-    compile 'com.android.support:design:27.0.2'
-    compile 'com.journeyapps:zxing-android-embedded:3.5.0@aar'
-    compile 'com.google.zxing:core:3.3.0'
-    compile 'org.apache.commons:commons-csv:1.2'
-    compile group: 'com.google.guava', name: 'guava', version: '20.0'
-    compile 'com.github.apl-devs:appintro:v4.2.0'
-    testCompile 'junit:junit:4.12'
-    testCompile "org.robolectric:robolectric:3.3.2"
+// AndroidX
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.cardview:cardview:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.preference:preference:1.1.1'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'io.wcm.tooling.spotbugs:io.wcm.tooling.spotbugs.annotations:1.0.0'
+
+// Third-party
+    implementation 'com.journeyapps:zxing-android-embedded:4.1.0@aar'
+    implementation 'com.google.zxing:core:3.3.3' // Do not upgrade past 3.3.3! Causes a crash on versions before Android 7
+    implementation 'org.apache.commons:commons-csv:1.8'
+    implementation 'com.jaredrummler:colorpicker:1.1.0'
+    implementation 'com.google.guava:guava:30.1-jre'
+    implementation 'com.github.invissvenska:NumberPickerPreference:1.0.1'
+
+// Testing
+    testImplementation 'androidx.test:core:1.0.0'
+    testImplementation 'junit:junit:4.13.1'
+    testImplementation 'org.robolectric:robolectric:4.4'
 }
 
-task findbugs(type: FindBugs, dependsOn: 'assembleDebug') {
+tasks.withType(SpotBugsTask) {
 
-    description 'Run findbugs'
+    description 'Run spotbugs'
     group 'verification'
 
-    classes = fileTree('build/intermediates/classes/debug/')
-    source = fileTree('src/main/java')
-    classpath = files()
-
-    effort = 'max'
-
-    excludeFilter = file("./config/findbugs/exclude.xml")
+    //classes = fileTree('build/intermediates/javac/debug/compileDebugJavaWithJavac/classes')
+    //source = fileTree('src/main/java')
+    //classpath = files()
 
     reports {
         xml.enabled = false

app/src/androidTest/java/protect/card_locker/ApplicationTest.java

@@ -1,15 +0,0 @@
-package protect.card_locker;
-
-import android.app.Application;
-import android.test.ApplicationTestCase;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application>
-{
-    public ApplicationTest()
-    {
-        super(Application.class);
-    }
-}

app/src/main/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest package="protect.card_locker"
-          xmlns:android="http://schemas.android.com/apk/res/android">
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
 
     <uses-permission
         android:name="android.permission.CAMERA"/>
@@ -16,8 +17,11 @@
         android:name="android.hardware.camera.autofocus"
         android:required="false" />
 
+    <uses-sdk tools:overrideLibrary="com.google.zxing.client.android" />
+
     <application
-        android:allowBackup="false"
+        android:name=".LoyaltyCardLockerApplication"
+        android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
@@ -32,32 +36,58 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <activity
+            android:name=".AboutActivity"
+            android:label="@string/about"
+            android:theme="@style/AppTheme.NoActionBar">
+        </activity>
+        <activity
+            android:name=".ManageGroupsActivity"
+            android:label="@string/groups"
+            android:theme="@style/AppTheme.NoActionBar">
+        </activity>
         <activity
             android:name=".LoyaltyCardViewActivity"
             android:theme="@style/AppTheme.NoActionBar"
-            android:configChanges="orientation|screenSize"
             android:windowSoftInputMode="stateHidden"
             android:exported="true"/>
+        <activity
+            android:name=".LoyaltyCardEditActivity"
+            android:theme="@style/AppTheme.NoActionBar"
+            android:windowSoftInputMode="stateHidden"
+            android:exported="true">
+            <intent-filter android:label="@string/app_name">
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <!-- Accepts URIs that begin with "https://github.com/brarcher/loyalty-card-locker/” -->
+                <data android:scheme="https"
+                    android:host="@string/intent_import_card_from_url_host"
+                    android:pathPrefix="@string/intent_import_card_from_url_path_prefix" />
+                <data android:scheme="https"
+                    android:host="@string/intent_import_card_from_url_host_old"
+                    android:pathPrefix="@string/intent_import_card_from_url_path_prefix_old" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".ScanActivity"
+            android:label="@string/scanCardBarcode"
+            android:theme="@style/AppTheme.NoActionBar"/>
         <activity
             android:name=".BarcodeSelectorActivity"
             android:label="@string/selectBarcodeTitle"
             android:theme="@style/AppTheme.NoActionBar"
-            android:configChanges="orientation|screenSize"
             android:windowSoftInputMode="stateHidden"/>
+        <activity
+            android:name=".preferences.SettingsActivity"
+            android:label="@string/settings"/>
         <activity
             android:name=".ImportExportActivity"
             android:label="@string/importExport"
-            android:configChanges="orientation|screenSize"
-            android:theme="@style/AppTheme.NoActionBar"/>
-        <activity
-            android:name=".intro.IntroActivity"
-            android:label=""
-            android:configChanges="orientation|screenSize"
             android:theme="@style/AppTheme.NoActionBar"/>
         <activity
             android:name=".CardShortcutConfigure"
             android:label="@string/cardShortcut"
-            android:configChanges="orientation|screenSize"
             android:theme="@style/AppTheme.NoActionBar">
             <intent-filter>
                 <action android:name="android.intent.action.CREATE_SHORTCUT"/>
@@ -65,7 +95,7 @@
             </intent-filter>
         </activity>
         <provider
-            android:name="android.support.v4.content.FileProvider"
+            android:name="androidx.core.content.FileProvider"
             android:grantUriPermissions="true"
             android:exported="false"
             android:authorities="${applicationId}">

app/src/main/java/protect/card_locker/AboutActivity.java

@@ -0,0 +1,111 @@
+package protect.card_locker;
+
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.text.method.LinkMovementMethod;
+import android.util.Log;
+import android.view.MenuItem;
+import android.widget.TextView;
+
+import com.google.common.collect.ImmutableMap;
+
+import java.util.Calendar;
+import java.util.Map;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.text.HtmlCompat;
+
+public class AboutActivity extends AppCompatActivity
+{
+    private static final String TAG = "Catima";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.about_activity);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        final Map<String, String> USED_LIBRARIES = new ImmutableMap.Builder<String, String>()
+                .put("Commons CSV", "https://commons.apache.org/proper/commons-csv/")
+                .put("Guava", "https://github.com/google/guava")
+                .put("ZXing", "https://github.com/zxing/zxing")
+                .put("ZXing Android Embedded", "https://github.com/journeyapps/zxing-android-embedded")
+                .put("Color Picker", "https://github.com/jaredrummler/ColorPicker")
+                .put("NumberPickerPreference", "https://github.com/invissvenska/NumberPickerPreference")
+                .build();
+
+        final Map<String, String> USED_ASSETS = ImmutableMap.of
+                (
+                        "Android icons", "https://www.apache.org/licenses/LICENSE-2.0.txt"
+                );
+
+        StringBuilder libs = new StringBuilder().append("<br/>");
+        for (Map.Entry<String, String> entry : USED_LIBRARIES.entrySet())
+        {
+            libs.append("<br/><a href=\"").append(entry.getValue()).append("\">").append(entry.getKey()).append("</a><br/>");
+        }
+
+        StringBuilder resources = new StringBuilder().append("<br/>");
+        for (Map.Entry<String, String> entry : USED_ASSETS.entrySet())
+        {
+            resources.append("<br/><a href=\"").append(entry.getValue()).append("\">").append(entry.getKey()).append("</a><br/>");
+        }
+
+        String appName = getString(R.string.app_name);
+        int year = Calendar.getInstance().get(Calendar.YEAR);
+
+        String version = "?";
+        try
+        {
+            PackageInfo pi = getPackageManager().getPackageInfo(getPackageName(), 0);
+            version = pi.versionName;
+        }
+        catch (PackageManager.NameNotFoundException e)
+        {
+            Log.w(TAG, "Package name not found", e);
+        }
+
+        setTitle(String.format(getString(R.string.about_title_fmt), appName));
+
+        TextView aboutTextView = findViewById(R.id.aboutText);
+        aboutTextView.setText(HtmlCompat.fromHtml(String.format(getString(R.string.debug_version_fmt), version) +
+                "<br/><br/>" +
+                String.format(getString(R.string.app_revision_fmt),
+                        "<a href=\"" + getString(R.string.app_revision_url) + "\">" +
+                                "GitHub" +
+                                "</a>") +
+                "<br/><br/>" +
+                String.format(getString(R.string.app_copyright_fmt), year) +
+                "<br/><br/>" +
+                getString(R.string.app_copyright_old) +
+                "<br/><br/>" +
+                getString(R.string.app_license) +
+                "<br/><br/>" +
+                String.format(getString(R.string.app_libraries), appName, libs.toString()) +
+                "<br/><br/>" +
+                String.format(getString(R.string.app_resources), appName, resources.toString()), HtmlCompat.FROM_HTML_MODE_COMPACT));
+        aboutTextView.setMovementMethod(LinkMovementMethod.getInstance());
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item)
+    {
+        int id = item.getItemId();
+
+        if (id == android.R.id.home) {
+            finish();
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+}

app/src/main/java/protect/card_locker/BarcodeImageWriterTask.java

@@ -5,6 +5,7 @@ import android.os.AsyncTask;
 import android.util.Log;
 import android.view.View;
 import android.widget.ImageView;
+import android.widget.TextView;
 
 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.MultiFormatWriter;
@@ -20,24 +21,32 @@ import java.lang.ref.WeakReference;
  */
 class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
 {
-    private static final String TAG = "LoyaltyCardLocker";
-    private static final int MAX_WIDTH = 500;
+    private static final String TAG = "Catima";
+
+    // When drawn in a smaller window 1D barcodes for some reason end up
+    // squished, whereas 2D barcodes look fine.
+    private static final int MAX_WIDTH_1D = 1500;
+    private static final int MAX_WIDTH_2D = 500;
 
     private final WeakReference<ImageView> imageViewReference;
+    private final WeakReference<TextView> textViewReference;
     private final String cardId;
     private final BarcodeFormat format;
     private final int imageHeight;
     private final int imageWidth;
 
     BarcodeImageWriterTask(ImageView imageView, String cardIdString,
-                                  BarcodeFormat barcodeFormat)
+                           BarcodeFormat barcodeFormat, TextView textView)
     {
         // Use a WeakReference to ensure the ImageView can be garbage collected
         imageViewReference = new WeakReference<>(imageView);
+        textViewReference = new WeakReference<>(textView);
 
         cardId = cardIdString;
         format = barcodeFormat;
 
+        final int MAX_WIDTH = getMaxWidth(format);
+
         if(imageView.getWidth() < MAX_WIDTH)
         {
             imageHeight = imageView.getHeight();
@@ -52,8 +61,48 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
         }
     }
 
+    BarcodeImageWriterTask(ImageView imageView, String cardIdString, BarcodeFormat barcodeFormat)
+    {
+        this(imageView, cardIdString, barcodeFormat, null);
+    }
+
+    private int getMaxWidth(BarcodeFormat format)
+    {
+        switch(format)
+        {
+            // 2D barcodes
+            case AZTEC:
+            case DATA_MATRIX:
+            case MAXICODE:
+            case PDF_417:
+            case QR_CODE:
+                return MAX_WIDTH_2D;
+
+            // 1D barcodes:
+            case CODABAR:
+            case CODE_39:
+            case CODE_93:
+            case CODE_128:
+            case EAN_8:
+            case EAN_13:
+            case ITF:
+            case UPC_A:
+            case UPC_E:
+            case RSS_14:
+            case RSS_EXPANDED:
+            case UPC_EAN_EXTENSION:
+            default:
+                return MAX_WIDTH_1D;
+        }
+    }
+
     public Bitmap doInBackground(Void... params)
     {
+        if (cardId.isEmpty())
+        {
+            return null;
+        }
+
         MultiFormatWriter writer = new MultiFormatWriter();
         BitMatrix bitMatrix;
         try
@@ -113,6 +162,12 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
         {
             Log.e(TAG, "Failed to generate barcode of type " + format + ": " + cardId, e);
         }
+        catch(OutOfMemoryError e)
+        {
+            Log.w(TAG, "Insufficient memory to render barcode, "
+                + imageWidth + "x" + imageHeight + ", " + format.name()
+                + ", length=" + cardId.length(), e);
+        }
 
         return null;
     }
@@ -128,16 +183,25 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
         }
 
         imageView.setImageBitmap(result);
+        TextView textView = textViewReference.get();
 
         if(result != null)
         {
             Log.i(TAG, "Displaying barcode");
             imageView.setVisibility(View.VISIBLE);
+
+            if (textView != null) {
+                textView.setVisibility(View.VISIBLE);
+                textView.setText(format.name());
+            }
         }
         else
         {
             Log.i(TAG, "Barcode generation failed, removing image from display");
             imageView.setVisibility(View.GONE);
+            if (textView != null) {
+                textView.setVisibility(View.GONE);
+            }
         }
     }
-}
+}

app/src/main/java/protect/card_locker/BarcodeSelectorActivity.java

@@ -3,19 +3,20 @@ package protect.card_locker;
 import android.app.Activity;
 import android.content.Intent;
 import android.os.AsyncTask;
-import android.os.Build;
 import android.os.Bundle;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.util.Log;
+import android.util.Pair;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewTreeObserver;
 import android.widget.EditText;
 import android.widget.ImageView;
+import android.widget.TextView;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.zxing.BarcodeFormat;
@@ -34,7 +35,7 @@ import java.util.Map;
  */
 public class BarcodeSelectorActivity extends AppCompatActivity
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
 
     // Result this activity will return
     public static final String BARCODE_CONTENTS = "contents";
@@ -58,7 +59,7 @@ public class BarcodeSelectorActivity extends AppCompatActivity
                 BarcodeFormat.UPC_A.name()
         ));
 
-    private Map<String, Integer> barcodeViewMap;
+    private Map<String, Pair<Integer, Integer>> barcodeViewMap;
     private LinkedList<AsyncTask> barcodeGeneratorTasks = new LinkedList<>();
 
     @Override
@@ -67,7 +68,7 @@ public class BarcodeSelectorActivity extends AppCompatActivity
         super.onCreate(savedInstanceState);
 
         setContentView(R.layout.barcode_selector_activity);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         ActionBar actionBar = getSupportActionBar();
         if(actionBar != null)
@@ -75,21 +76,21 @@ public class BarcodeSelectorActivity extends AppCompatActivity
             actionBar.setDisplayHomeAsUpEnabled(true);
         }
 
-        barcodeViewMap = ImmutableMap.<String, Integer>builder()
-                .put(BarcodeFormat.AZTEC.name(), R.id.aztecBarcode)
-                .put(BarcodeFormat.CODE_39.name(), R.id.code39Barcode)
-                .put(BarcodeFormat.CODE_128.name(), R.id.code128Barcode)
-                .put(BarcodeFormat.CODABAR.name(), R.id.codabarBarcode)
-                .put(BarcodeFormat.DATA_MATRIX.name(), R.id.datamatrixBarcode)
-                .put(BarcodeFormat.EAN_8.name(), R.id.ean8Barcode)
-                .put(BarcodeFormat.EAN_13.name(), R.id.ean13Barcode)
-                .put(BarcodeFormat.ITF.name(), R.id.itfBarcode)
-                .put(BarcodeFormat.PDF_417.name(), R.id.pdf417Barcode)
-                .put(BarcodeFormat.QR_CODE.name(), R.id.qrcodeBarcode)
-                .put(BarcodeFormat.UPC_A.name(), R.id.upcaBarcode)
+        barcodeViewMap = ImmutableMap.<String, Pair<Integer, Integer>>builder()
+                .put(BarcodeFormat.AZTEC.name(), new Pair<>(R.id.aztecBarcode, R.id.aztecBarcodeText))
+                .put(BarcodeFormat.CODE_39.name(), new Pair<>(R.id.code39Barcode, R.id.code39BarcodeText))
+                .put(BarcodeFormat.CODE_128.name(), new Pair<>(R.id.code128Barcode, R.id.code128BarcodeText))
+                .put(BarcodeFormat.CODABAR.name(), new Pair<>(R.id.codabarBarcode, R.id.codabarBarcodeText))
+                .put(BarcodeFormat.DATA_MATRIX.name(), new Pair<>(R.id.datamatrixBarcode, R.id.datamatrixBarcodeText))
+                .put(BarcodeFormat.EAN_8.name(), new Pair<>(R.id.ean8Barcode, R.id.ean8BarcodeText))
+                .put(BarcodeFormat.EAN_13.name(), new Pair<>(R.id.ean13Barcode, R.id.ean13BarcodeText))
+                .put(BarcodeFormat.ITF.name(), new Pair<>(R.id.itfBarcode, R.id.itfBarcodeText))
+                .put(BarcodeFormat.PDF_417.name(), new Pair<>(R.id.pdf417Barcode, R.id.pdf417BarcodeText))
+                .put(BarcodeFormat.QR_CODE.name(), new Pair<>(R.id.qrcodeBarcode, R.id.qrcodeBarcodeText))
+                .put(BarcodeFormat.UPC_A.name(), new Pair<>(R.id.upcaBarcode, R.id.upcaBarcodeText))
                 .build();
 
-        EditText cardId = (EditText) findViewById(R.id.cardId);
+        EditText cardId = findViewById(R.id.cardId);
         cardId.addTextChangedListener(new TextWatcher()
         {
             @Override
@@ -113,9 +114,14 @@ public class BarcodeSelectorActivity extends AppCompatActivity
                 // Update barcodes
                 for(String key : barcodeViewMap.keySet())
                 {
-                    ImageView image = (ImageView)findViewById(barcodeViewMap.get(key));
-                    createBarcodeOption(image, key, s.toString());
+                    ImageView image = findViewById(barcodeViewMap.get(key).first);
+                    TextView text = findViewById(barcodeViewMap.get(key).second);
+                    createBarcodeOption(image, key, s.toString(), text);
                 }
+
+                View noBarcodeButtonView = findViewById(R.id.noBarcode);
+                setButtonListener(noBarcodeButtonView, s.toString());
+                noBarcodeButtonView.setEnabled(s.length() > 0);
             }
 
             @Override
@@ -134,7 +140,22 @@ public class BarcodeSelectorActivity extends AppCompatActivity
         }
     }
 
-    private void createBarcodeOption(final ImageView image, final String formatType, final String cardId)
+    private void setButtonListener(final View button, final String cardId)
+    {
+        button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Log.d(TAG, "Selected no barcode");
+                Intent result = new Intent();
+                result.putExtra(BARCODE_FORMAT, "");
+                result.putExtra(BARCODE_CONTENTS, cardId);
+                BarcodeSelectorActivity.this.setResult(RESULT_OK, result);
+                finish();
+            }
+        });
+    }
+
+    private void createBarcodeOption(final ImageView image, final String formatType, final String cardId, final TextView text)
     {
         final BarcodeFormat format = BarcodeFormat.valueOf(formatType);
         if(format == null)
@@ -169,17 +190,10 @@ public class BarcodeSelectorActivity extends AppCompatActivity
                     public void onGlobalLayout()
                     {
                         Log.d(TAG, "Global layout finished, type: + " + formatType + ", width: " + image.getWidth());
-                        if (Build.VERSION.SDK_INT < 16)
-                        {
-                            image.getViewTreeObserver().removeGlobalOnLayoutListener(this);
-                        }
-                        else
-                        {
-                            image.getViewTreeObserver().removeOnGlobalLayoutListener(this);
-                        }
+                        image.getViewTreeObserver().removeOnGlobalLayoutListener(this);
 
                         Log.d(TAG, "Generating barcode for type " + formatType);
-                        BarcodeImageWriterTask task = new BarcodeImageWriterTask(image, cardId, format);
+                        BarcodeImageWriterTask task = new BarcodeImageWriterTask(image, cardId, format, text);
                         barcodeGeneratorTasks.add(task);
                         task.execute();
                     }
@@ -188,7 +202,7 @@ public class BarcodeSelectorActivity extends AppCompatActivity
         else
         {
             Log.d(TAG, "Generating barcode for type " + formatType);
-            BarcodeImageWriterTask task = new BarcodeImageWriterTask(image, cardId, format);
+            BarcodeImageWriterTask task = new BarcodeImageWriterTask(image, cardId, format, text);
             barcodeGeneratorTasks.add(task);
             task.execute();
         }

app/src/main/java/protect/card_locker/BarcodeValues.java

@@ -0,0 +1,23 @@
+package protect.card_locker;
+
+public class BarcodeValues {
+    private final String mFormat;
+    private final String mContent;
+
+    public BarcodeValues(String format, String content) {
+        mFormat = format;
+        mContent = content;
+    }
+
+    public String format() {
+        return mFormat;
+    }
+
+    public String content() {
+        return mContent;
+    }
+
+    public boolean isEmpty() {
+        return mFormat == null && mContent == null;
+    }
+}

app/src/main/java/protect/card_locker/CardShortcutConfigure.java

@@ -4,8 +4,8 @@ import android.content.Intent;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.os.Parcelable;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import android.util.Log;
 import android.view.View;
 import android.widget.AdapterView;
@@ -17,7 +17,7 @@ import android.widget.Toast;
  */
 public class CardShortcutConfigure extends AppCompatActivity
 {
-    static final String TAG = "LoyaltyCardLocker";
+    static final String TAG = "Catima";
 
     @Override
     public void onCreate(Bundle bundle)
@@ -29,7 +29,7 @@ public class CardShortcutConfigure extends AppCompatActivity
         setResult(RESULT_CANCELED);
 
         setContentView(R.layout.main_activity);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         toolbar.setVisibility(View.GONE);
 
         final DBHelper db = new DBHelper(this);
@@ -41,7 +41,7 @@ public class CardShortcutConfigure extends AppCompatActivity
             finish();
         }
 
-        final ListView cardList = (ListView) findViewById(R.id.list);
+        final ListView cardList = findViewById(R.id.list);
         cardList.setVisibility(View.VISIBLE);
 
         Cursor cardCursor = db.getLoyaltyCardCursor();

app/src/main/java/protect/card_locker/CsvDatabaseExporter.java

@@ -18,24 +18,21 @@ public class CsvDatabaseExporter implements DatabaseExporter
     {
         CSVPrinter printer = new CSVPrinter(output, CSVFormat.RFC4180);
 
-        // Print the header
-        printer.printRecord(DBHelper.LoyaltyCardDbIds.ID,
-                DBHelper.LoyaltyCardDbIds.STORE,
-                DBHelper.LoyaltyCardDbIds.NOTE,
-                DBHelper.LoyaltyCardDbIds.CARD_ID,
-                DBHelper.LoyaltyCardDbIds.BARCODE_TYPE);
+        // Print the version
+        printer.printRecord("2");
 
-        Cursor cursor = db.getLoyaltyCardCursor();
+        printer.println();
 
-        while(cursor.moveToNext())
+        // Print the header for groups
+        printer.printRecord(DBHelper.LoyaltyCardDbGroups.ID);
+
+        Cursor groupCursor = db.getGroupCursor();
+
+        while(groupCursor.moveToNext())
         {
-            LoyaltyCard card = LoyaltyCard.toLoyaltyCard(cursor);
+            Group group = Group.toGroup(groupCursor);
 
-            printer.printRecord(card.id,
-                    card.store,
-                    card.note,
-                    card.cardId,
-                    card.barcodeType);
+            printer.printRecord(group._id);
 
             if(Thread.currentThread().isInterrupted())
             {
@@ -43,7 +40,72 @@ public class CsvDatabaseExporter implements DatabaseExporter
             }
         }
 
-        cursor.close();
+        groupCursor.close();
+
+        // Print an empty line
+        printer.println();
+
+        // Print the header for cards
+        printer.printRecord(DBHelper.LoyaltyCardDbIds.ID,
+                DBHelper.LoyaltyCardDbIds.STORE,
+                DBHelper.LoyaltyCardDbIds.NOTE,
+                DBHelper.LoyaltyCardDbIds.EXPIRY,
+                DBHelper.LoyaltyCardDbIds.BALANCE,
+                DBHelper.LoyaltyCardDbIds.BALANCE_TYPE,
+                DBHelper.LoyaltyCardDbIds.CARD_ID,
+                DBHelper.LoyaltyCardDbIds.HEADER_COLOR,
+                DBHelper.LoyaltyCardDbIds.BARCODE_TYPE,
+                DBHelper.LoyaltyCardDbIds.STAR_STATUS);
+
+        Cursor cardCursor = db.getLoyaltyCardCursor();
+
+        while(cardCursor.moveToNext())
+        {
+            LoyaltyCard card = LoyaltyCard.toLoyaltyCard(cardCursor);
+
+            printer.printRecord(card.id,
+                    card.store,
+                    card.note,
+                    card.expiry != null ? card.expiry.getTime() : "",
+                    card.balance,
+                    card.balanceType,
+                    card.cardId,
+                    card.headerColor,
+                    card.barcodeType,
+                    card.starStatus);
+
+            if(Thread.currentThread().isInterrupted())
+            {
+                throw new InterruptedException();
+            }
+        }
+
+        cardCursor.close();
+
+        // Print an empty line
+        printer.println();
+
+        // Print the header for card group mappings
+        printer.printRecord(DBHelper.LoyaltyCardDbIdsGroups.cardID,
+                DBHelper.LoyaltyCardDbIdsGroups.groupID);
+
+        Cursor cardCursor2 = db.getLoyaltyCardCursor();
+
+        while(cardCursor2.moveToNext())
+        {
+            LoyaltyCard card = LoyaltyCard.toLoyaltyCard(cardCursor2);
+
+            for (Group group : db.getLoyaltyCardGroups(card.id)) {
+                printer.printRecord(card.id, group._id);
+            }
+
+            if(Thread.currentThread().isInterrupted())
+            {
+                throw new InterruptedException();
+            }
+        }
+
+        cardCursor2.close();
 
         printer.close();
     }

app/src/main/java/protect/card_locker/CsvDatabaseImporter.java

@@ -6,8 +6,14 @@ import org.apache.commons.csv.CSVFormat;
 import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVRecord;
 
+import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.io.StringReader;
+import java.math.BigDecimal;
+import java.util.Currency;
+import java.util.Date;
+import java.util.List;
 
 /**
  * Class for importing a database from CSV (Comma Separate Values)
@@ -19,6 +25,36 @@ import java.io.InputStreamReader;
 public class CsvDatabaseImporter implements DatabaseImporter
 {
     public void importData(DBHelper db, InputStreamReader input) throws IOException, FormatException, InterruptedException
+    {
+        BufferedReader bufferedReader = new BufferedReader(input);
+
+        bufferedReader.mark(100);
+
+        Integer version = 1;
+
+        try {
+            version = Integer.parseInt(bufferedReader.readLine());
+        } catch (NumberFormatException _e) {
+            // Assume version 1
+        }
+
+        bufferedReader.reset();
+
+        switch (version) {
+            case 1:
+                parseV1(db, bufferedReader);
+                break;
+            case 2:
+                parseV2(db, bufferedReader);
+                break;
+            default:
+                throw new FormatException(String.format("No code to parse version %s", version));
+        }
+
+        bufferedReader.close();
+    }
+
+    public void parseV1(DBHelper db, BufferedReader input) throws IOException, FormatException, InterruptedException
     {
         final CSVParser parser = new CSVParser(input, CSVFormat.RFC4180.withHeader());
 
@@ -40,7 +76,7 @@ public class CsvDatabaseImporter implements DatabaseImporter
             parser.close();
             database.setTransactionSuccessful();
         }
-        catch(IllegalArgumentException e)
+        catch(IllegalArgumentException|IllegalStateException e)
         {
             throw new FormatException("Issue parsing CSV data", e);
         }
@@ -51,6 +87,115 @@ public class CsvDatabaseImporter implements DatabaseImporter
         }
     }
 
+    public void parseV2(DBHelper db, BufferedReader input) throws IOException, FormatException, InterruptedException
+    {
+        SQLiteDatabase database = db.getWritableDatabase();
+        database.beginTransaction();
+
+        Integer part = 0;
+        String stringPart = "";
+
+        try {
+            while (true) {
+                String tmp = input.readLine();
+
+                if (tmp == null || tmp.isEmpty()) {
+                    switch (part) {
+                        case 0:
+                            // This is the version info, ignore
+                            break;
+                        case 1:
+                            parseV2Groups(db, database, stringPart);
+                            break;
+                        case 2:
+                            parseV2Cards(db, database, stringPart);
+                            break;
+                        case 3:
+                            parseV2CardGroups(db, database, stringPart);
+                            break;
+                        default:
+                            throw new FormatException("Issue parsing CSV data, too many parts for v2 parsing");
+                    }
+
+                    if (tmp == null) {
+                        break;
+                    }
+
+                    part += 1;
+                    stringPart = "";
+                } else {
+                    stringPart += tmp + "\n";
+                }
+            }
+            database.setTransactionSuccessful();
+        } catch (FormatException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        } finally {
+            database.endTransaction();
+            database.close();
+        }
+    }
+
+    public void parseV2Groups(DBHelper db, SQLiteDatabase database, String data) throws IOException, FormatException, InterruptedException
+    {
+        // Parse groups
+        final CSVParser groupParser = new CSVParser(new StringReader(data), CSVFormat.RFC4180.withHeader());
+
+        try {
+            for (CSVRecord record : groupParser) {
+                importGroup(database, db, record);
+
+                if (Thread.currentThread().isInterrupted()) {
+                    throw new InterruptedException();
+                }
+            }
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        } finally {
+            groupParser.close();
+        }
+    }
+
+    public void parseV2Cards(DBHelper db, SQLiteDatabase database, String data) throws IOException, FormatException, InterruptedException
+    {
+        // Parse cards
+        final CSVParser cardParser = new CSVParser(new StringReader(data), CSVFormat.RFC4180.withHeader());
+
+        try {
+            for (CSVRecord record : cardParser) {
+                importLoyaltyCard(database, db, record);
+
+                if (Thread.currentThread().isInterrupted()) {
+                    throw new InterruptedException();
+                }
+            }
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        } finally {
+            cardParser.close();
+        }
+    }
+
+    public void parseV2CardGroups(DBHelper db, SQLiteDatabase database, String data) throws IOException, FormatException, InterruptedException
+    {
+        // Parse card group mappings
+        final CSVParser cardGroupParser = new CSVParser(new StringReader(data), CSVFormat.RFC4180.withHeader());
+
+        try {
+            for (CSVRecord record : cardGroupParser) {
+                importCardGroupMapping(database, db, record);
+
+                if (Thread.currentThread().isInterrupted()) {
+                    throw new InterruptedException();
+                }
+            }
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        } finally {
+            cardGroupParser.close();
+        }
+    }
+
     /**
      * Extract a string from the items array. The index into the array
      * is determined by looking up the index in the fields map using the
@@ -83,7 +228,7 @@ public class CsvDatabaseImporter implements DatabaseImporter
      * "key" as the key. If no such key exists, or the data is not a valid
      * int, a FormatException is thrown.
      */
-    private int extractInt(String key, CSVRecord record)
+    private Integer extractInt(String key, CSVRecord record, boolean nullIsOk)
             throws FormatException
     {
         if(record.isMapped(key) == false)
@@ -91,6 +236,12 @@ public class CsvDatabaseImporter implements DatabaseImporter
             throw new FormatException("Field not used but expected: " + key);
         }
 
+        String value = record.get(key);
+        if(value.isEmpty() && nullIsOk)
+        {
+            return null;
+        }
+
         try
         {
             return Integer.parseInt(record.get(key));
@@ -101,6 +252,36 @@ public class CsvDatabaseImporter implements DatabaseImporter
         }
     }
 
+    /**
+     * Extract a long from the items array. The index into the array
+     * is determined by looking up the index in the fields map using the
+     * "key" as the key. If no such key exists, or the data is not a valid
+     * int, a FormatException is thrown.
+     */
+    private Long extractLong(String key, CSVRecord record, boolean nullIsOk)
+            throws FormatException
+    {
+        if(record.isMapped(key) == false)
+        {
+            throw new FormatException("Field not used but expected: " + key);
+        }
+
+        String value = record.get(key);
+        if(value.isEmpty() && nullIsOk)
+        {
+            return null;
+        }
+
+        try
+        {
+            return Long.parseLong(record.get(key));
+        }
+        catch(NumberFormatException e)
+        {
+            throw new FormatException("Failed to parse field: " + key, e);
+        }
+    }
+
     /**
      * Import a single loyalty card into the database using the given
      * session.
@@ -108,7 +289,7 @@ public class CsvDatabaseImporter implements DatabaseImporter
     private void importLoyaltyCard(SQLiteDatabase database, DBHelper helper, CSVRecord record)
             throws IOException, FormatException
     {
-        int id = extractInt(DBHelper.LoyaltyCardDbIds.ID, record);
+        int id = extractInt(DBHelper.LoyaltyCardDbIds.ID, record, false);
 
         String store = extractString(DBHelper.LoyaltyCardDbIds.STORE, record, "");
         if(store.isEmpty())
@@ -117,6 +298,25 @@ public class CsvDatabaseImporter implements DatabaseImporter
         }
 
         String note = extractString(DBHelper.LoyaltyCardDbIds.NOTE, record, "");
+        Date expiry = null;
+        try {
+            expiry = new Date(extractLong(DBHelper.LoyaltyCardDbIds.EXPIRY, record, true));
+        } catch (NullPointerException | FormatException e) { }
+
+        BigDecimal balance;
+        try {
+            balance = new BigDecimal(extractString(DBHelper.LoyaltyCardDbIds.BALANCE, record, null));
+        } catch (FormatException _e ) {
+            // These fields did not exist in versions 1.8.1 and before
+            // We catch this exception so we can still import old backups
+            balance = new BigDecimal("0");
+        }
+
+        Currency balanceType = null;
+        String unparsedBalanceType = extractString(DBHelper.LoyaltyCardDbIds.BALANCE_TYPE, record, "");
+        if(!unparsedBalanceType.isEmpty()) {
+            balanceType = Currency.getInstance(unparsedBalanceType);
+        }
 
         String cardId = extractString(DBHelper.LoyaltyCardDbIds.CARD_ID, record, "");
         if(cardId.isEmpty())
@@ -125,11 +325,49 @@ public class CsvDatabaseImporter implements DatabaseImporter
         }
 
         String barcodeType = extractString(DBHelper.LoyaltyCardDbIds.BARCODE_TYPE, record, "");
-        if(barcodeType.isEmpty())
+
+        Integer headerColor = null;
+
+        if(record.isMapped(DBHelper.LoyaltyCardDbIds.HEADER_COLOR))
         {
-            throw new FormatException("No barcode type listed, but is required");
+            headerColor = extractInt(DBHelper.LoyaltyCardDbIds.HEADER_COLOR, record, true);
         }
 
-        helper.insertLoyaltyCard(database, id, store, note, cardId, barcodeType);
+        int starStatus = 0;
+        try {
+            starStatus = extractInt(DBHelper.LoyaltyCardDbIds.STAR_STATUS, record, false);
+        } catch (FormatException _e ) {
+            // This field did not exist in versions 0.28 and before
+            // We catch this exception so we can still import old backups
+        }
+        if (starStatus != 1) starStatus = 0;
+        helper.insertLoyaltyCard(database, id, store, note, expiry, balance, balanceType, cardId, barcodeType, headerColor, starStatus);
     }
-}
+
+    /**
+     * Import a single group into the database using the given
+     * session.
+     */
+    private void importGroup(SQLiteDatabase database, DBHelper helper, CSVRecord record)
+            throws IOException, FormatException
+    {
+        String id = extractString(DBHelper.LoyaltyCardDbGroups.ID, record, null);
+
+        helper.insertGroup(database, id);
+    }
+
+    /**
+     * Import a single card to group mapping into the database using the given
+     * session.
+     */
+    private void importCardGroupMapping(SQLiteDatabase database, DBHelper helper, CSVRecord record)
+            throws IOException, FormatException
+    {
+        Integer cardId = extractInt(DBHelper.LoyaltyCardDbIdsGroups.cardID, record, false);
+        String groupId = extractString(DBHelper.LoyaltyCardDbIdsGroups.groupID, record, null);
+
+        List<Group> cardGroups = helper.getLoyaltyCardGroups(cardId);
+        cardGroups.add(helper.getGroup(groupId));
+        helper.setLoyaltyCardGroups(database, cardId, cardGroups);
+    }
+}

app/src/main/java/protect/card_locker/DBHelper.java

@@ -1,26 +1,53 @@
 package protect.card_locker;
 
-
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteException;
 import android.database.sqlite.SQLiteOpenHelper;
+import android.graphics.Color;
+
+import java.math.BigDecimal;
+import java.util.Currency;
+import java.util.Date;
+import java.util.ArrayList;
+import java.util.List;
 
 public class DBHelper extends SQLiteOpenHelper
 {
-    public static final String DATABASE_NAME = "LoyaltyCards.db";
+    public static final String DATABASE_NAME = "Catima.db";
     public static final int ORIGINAL_DATABASE_VERSION = 1;
-    public static final int DATABASE_VERSION = 2;
+    public static final int DATABASE_VERSION = 8;
+
+    static class LoyaltyCardDbGroups
+    {
+        public static final String TABLE = "groups";
+        public static final String ID = "_id";
+        public static final String ORDER = "orderId";
+    }
 
     static class LoyaltyCardDbIds
     {
         public static final String TABLE = "cards";
         public static final String ID = "_id";
         public static final String STORE = "store";
+        public static final String EXPIRY = "expiry";
+        public static final String BALANCE = "balance";
+        public static final String BALANCE_TYPE = "balancetype";
         public static final String NOTE = "note";
+        public static final String HEADER_COLOR = "headercolor";
+        public static final String HEADER_TEXT_COLOR = "headertextcolor";
         public static final String CARD_ID = "cardid";
         public static final String BARCODE_TYPE = "barcodetype";
+        public static final String STAR_STATUS = "starstatus";
+    }
+
+    static class LoyaltyCardDbIdsGroups
+    {
+        public static final String TABLE = "cardsGroups";
+        public static final String cardID = "cardId";
+        public static final String groupID = "groupId";
     }
 
     public DBHelper(Context context)
@@ -31,13 +58,31 @@ public class DBHelper extends SQLiteOpenHelper
     @Override
     public void onCreate(SQLiteDatabase db)
     {
-        // create table for gift cards
+        // create table for card groups
+        db.execSQL("create table " + LoyaltyCardDbGroups.TABLE + "(" +
+                LoyaltyCardDbGroups.ID + " TEXT primary key not null," +
+                LoyaltyCardDbGroups.ORDER + " INTEGER DEFAULT '0')");
+
+        // create table for cards
+        // Balance is TEXT and not REAL to be able to store a BigDecimal without precision loss
         db.execSQL("create table " + LoyaltyCardDbIds.TABLE + "(" +
                 LoyaltyCardDbIds.ID + " INTEGER primary key autoincrement," +
                 LoyaltyCardDbIds.STORE + " TEXT not null," +
                 LoyaltyCardDbIds.NOTE + " TEXT not null," +
+                LoyaltyCardDbIds.EXPIRY + " INTEGER," +
+                LoyaltyCardDbIds.BALANCE + " TEXT not null DEFAULT '0'," +
+                LoyaltyCardDbIds.BALANCE_TYPE + " TEXT," +
+                LoyaltyCardDbIds.HEADER_COLOR + " INTEGER," +
+                LoyaltyCardDbIds.HEADER_TEXT_COLOR + " INTEGER," +
                 LoyaltyCardDbIds.CARD_ID + " TEXT not null," +
-                LoyaltyCardDbIds.BARCODE_TYPE + " TEXT not null)");
+                LoyaltyCardDbIds.BARCODE_TYPE + " TEXT not null," +
+                LoyaltyCardDbIds.STAR_STATUS + " INTEGER DEFAULT '0' )");
+
+        // create associative table for cards in groups
+        db.execSQL("create table " + LoyaltyCardDbIdsGroups.TABLE + "(" +
+                LoyaltyCardDbIdsGroups.cardID + " INTEGER," +
+                LoyaltyCardDbIdsGroups.groupID + " TEXT," +
+                "primary key (" + LoyaltyCardDbIdsGroups.cardID + "," + LoyaltyCardDbIdsGroups.groupID +"))");
     }
 
     @Override
@@ -49,45 +94,127 @@ public class DBHelper extends SQLiteOpenHelper
             db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
                     + " ADD COLUMN " + LoyaltyCardDbIds.NOTE + " TEXT not null default ''");
         }
+
+        // Upgrade from version 2 to version 3
+        if(oldVersion < 3 && newVersion >= 3)
+        {
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.HEADER_COLOR + " INTEGER");
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.HEADER_TEXT_COLOR + " INTEGER");
+        }
+
+        // Upgrade from version 3 to version 4
+        if(oldVersion < 4 && newVersion >= 4)
+        {
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.STAR_STATUS + " INTEGER DEFAULT '0'");
+        }
+
+        // Upgrade from version 4 to version 5
+        if(oldVersion < 5 && newVersion >= 5)
+        {
+            db.execSQL("create table " + LoyaltyCardDbGroups.TABLE + "(" +
+                    LoyaltyCardDbGroups.ID + " TEXT primary key not null)");
+
+            db.execSQL("create table " + LoyaltyCardDbIdsGroups.TABLE + "(" +
+                    LoyaltyCardDbIdsGroups.cardID + " INTEGER," +
+                    LoyaltyCardDbIdsGroups.groupID + " TEXT," +
+                    "primary key (" + LoyaltyCardDbIdsGroups.cardID + "," + LoyaltyCardDbIdsGroups.groupID +"))");
+        }
+
+        // Upgrade from version 5 to 6
+        if(oldVersion < 6 && newVersion >= 6)
+        {
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbGroups.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbGroups.ORDER + " INTEGER DEFAULT '0'");
+        }
+
+        if(oldVersion < 7 && newVersion >= 7)
+        {
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.EXPIRY + " INTEGER");
+        }
+
+        if(oldVersion < 8 && newVersion >= 8)
+        {
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.BALANCE + " TEXT not null DEFAULT '0'");
+            db.execSQL("ALTER TABLE " + LoyaltyCardDbIds.TABLE
+                    + " ADD COLUMN " + LoyaltyCardDbIds.BALANCE_TYPE + " TEXT");
+        }
     }
 
-    public long insertLoyaltyCard(final String store, final String note, final String cardId,
-                                     final String barcodeType)
+    public long insertLoyaltyCard(final String store, final String note, final Date expiry,
+                                  final BigDecimal balance, final Currency balanceType,
+                                  final String cardId, final String barcodeType,
+                                  final Integer headerColor, final int starStatus)
     {
         SQLiteDatabase db = getWritableDatabase();
         ContentValues contentValues = new ContentValues();
         contentValues.put(LoyaltyCardDbIds.STORE, store);
         contentValues.put(LoyaltyCardDbIds.NOTE, note);
+        contentValues.put(LoyaltyCardDbIds.EXPIRY, expiry != null ? expiry.getTime() : null);
+        contentValues.put(LoyaltyCardDbIds.BALANCE, balance.toString());
+        contentValues.put(LoyaltyCardDbIds.BALANCE_TYPE, balanceType != null ? balanceType.getCurrencyCode() : null);
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
+        contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
+        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, Color.WHITE);
+        contentValues.put(LoyaltyCardDbIds.STAR_STATUS, starStatus);
         final long newId = db.insert(LoyaltyCardDbIds.TABLE, null, contentValues);
         return newId;
     }
 
-    public boolean insertLoyaltyCard(final SQLiteDatabase db, final int id,
-                                     final String store, final String note, final String cardId,
-                                     final String barcodeType)
+    public boolean insertLoyaltyCard(final SQLiteDatabase db, final int id, final String store,
+                                     final String note, final Date expiry, final BigDecimal balance,
+                                     final Currency balanceType, final String cardId,
+                                     final String barcodeType, final Integer headerColor,
+                                     final int starStatus)
     {
         ContentValues contentValues = new ContentValues();
         contentValues.put(LoyaltyCardDbIds.ID, id);
         contentValues.put(LoyaltyCardDbIds.STORE, store);
         contentValues.put(LoyaltyCardDbIds.NOTE, note);
+        contentValues.put(LoyaltyCardDbIds.EXPIRY, expiry != null ? expiry.getTime() : null);
+        contentValues.put(LoyaltyCardDbIds.BALANCE, balance.toString());
+        contentValues.put(LoyaltyCardDbIds.BALANCE_TYPE, balanceType != null ? balanceType.getCurrencyCode() : null);
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
+        contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
+        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, Color.WHITE);
+        contentValues.put(LoyaltyCardDbIds.STAR_STATUS,starStatus);
         final long newId = db.insert(LoyaltyCardDbIds.TABLE, null, contentValues);
         return (newId != -1);
     }
 
-
     public boolean updateLoyaltyCard(final int id, final String store, final String note,
-                                     final String cardId, final String barcodeType)
+                                     final Date expiry, final BigDecimal balance,
+                                     final Currency balanceType, final String cardId,
+                                     final String barcodeType, final Integer headerColor)
     {
         SQLiteDatabase db = getWritableDatabase();
         ContentValues contentValues = new ContentValues();
         contentValues.put(LoyaltyCardDbIds.STORE, store);
         contentValues.put(LoyaltyCardDbIds.NOTE, note);
+        contentValues.put(LoyaltyCardDbIds.EXPIRY, expiry != null ? expiry.getTime() : null);
+        contentValues.put(LoyaltyCardDbIds.BALANCE, balance.toString());
+        contentValues.put(LoyaltyCardDbIds.BALANCE_TYPE, balanceType != null ? balanceType.getCurrencyCode() : null);
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
+        contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
+        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, Color.WHITE);
+        int rowsUpdated = db.update(LoyaltyCardDbIds.TABLE, contentValues,
+                LoyaltyCardDbIds.ID + "=?",
+                new String[]{Integer.toString(id)});
+        return (rowsUpdated == 1);
+    }
+
+    public boolean updateLoyaltyCardStarStatus(final int id, final int starStatus)
+    {
+        SQLiteDatabase db = getWritableDatabase();
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(LoyaltyCardDbIds.STAR_STATUS,starStatus);
         int rowsUpdated = db.update(LoyaltyCardDbIds.TABLE, contentValues,
                 LoyaltyCardDbIds.ID + "=?",
                 new String[]{Integer.toString(id)});
@@ -105,6 +232,7 @@ public class DBHelper extends SQLiteOpenHelper
         if(data.getCount() == 1)
         {
             data.moveToFirst();
+
             card = LoyaltyCard.toLoyaltyCard(data);
         }
 
@@ -113,27 +241,391 @@ public class DBHelper extends SQLiteOpenHelper
         return card;
     }
 
+    public List<Group> getLoyaltyCardGroups(final int id)
+    {
+        SQLiteDatabase db = getReadableDatabase();
+        Cursor data = db.rawQuery("select * from " + LoyaltyCardDbGroups.TABLE + " g " +
+                " LEFT JOIN " + LoyaltyCardDbIdsGroups.TABLE + " ig ON ig." + LoyaltyCardDbIdsGroups.groupID + " = g." + LoyaltyCardDbGroups.ID +
+                " where " + LoyaltyCardDbIdsGroups.cardID + "=?" +
+                " ORDER BY " + LoyaltyCardDbIdsGroups.groupID, new String[]{String.format("%d", id)});
+
+        List<Group> groups = new ArrayList<>();
+
+        if (!data.moveToFirst()) {
+            data.close();
+            return groups;
+        }
+
+        groups.add(Group.toGroup(data));
+
+        while (data.moveToNext()) {
+            groups.add(Group.toGroup(data));
+        }
+
+        data.close();
+
+        return groups;
+    }
+
+    public void setLoyaltyCardGroups(final int id, List<Group> groups)
+    {
+        SQLiteDatabase db = getWritableDatabase();
+
+        // First delete lookup table entries associated with this card
+        db.delete(LoyaltyCardDbIdsGroups.TABLE,
+                LoyaltyCardDbIdsGroups.cardID + " = ? ",
+                new String[]{String.format("%d", id)});
+
+        // Then create entries for selected values
+        for (Group group : groups) {
+            ContentValues contentValues = new ContentValues();
+            contentValues.put(LoyaltyCardDbIdsGroups.cardID, id);
+            contentValues.put(LoyaltyCardDbIdsGroups.groupID, group._id);
+            db.insert(LoyaltyCardDbIdsGroups.TABLE, null, contentValues);
+        }
+    }
+
+    public void setLoyaltyCardGroups(final SQLiteDatabase db, final int id, List<Group> groups)
+    {
+        // First delete lookup table entries associated with this card
+        db.delete(LoyaltyCardDbIdsGroups.TABLE,
+                LoyaltyCardDbIdsGroups.cardID + " = ? ",
+                new String[]{String.format("%d", id)});
+
+        // Then create entries for selected values
+        for (Group group : groups) {
+            ContentValues contentValues = new ContentValues();
+            contentValues.put(LoyaltyCardDbIdsGroups.cardID, id);
+            contentValues.put(LoyaltyCardDbIdsGroups.groupID, group._id);
+            db.insert(LoyaltyCardDbIdsGroups.TABLE, null, contentValues);
+        }
+    }
+
     public boolean deleteLoyaltyCard (final int id)
     {
         SQLiteDatabase db = getWritableDatabase();
-        int rowsDeleted =  db.delete(LoyaltyCardDbIds.TABLE,
+        // Delete card
+        int rowsDeleted = db.delete(LoyaltyCardDbIds.TABLE,
                 LoyaltyCardDbIds.ID + " = ? ",
                 new String[]{String.format("%d", id)});
+
+        // And delete lookup table entries associated with this card
+        db.delete(LoyaltyCardDbIdsGroups.TABLE,
+                LoyaltyCardDbIdsGroups.cardID + " = ? ",
+                new String[]{String.format("%d", id)});
+
         return (rowsDeleted == 1);
     }
 
     public Cursor getLoyaltyCardCursor()
     {
+        // An empty string will match everything
+        return getLoyaltyCardCursor("");
+    }
+
+    /**
+     * Returns a cursor to all loyalty cards with the filter text in either the store or note.
+     *
+     * @param filter
+     * @return Cursor
+     */
+    public Cursor getLoyaltyCardCursor(final String filter)
+    {
+        return getLoyaltyCardCursor(filter, null);
+    }
+
+    /**
+     * Returns a cursor to all loyalty cards with the filter text in either the store or note in a certain group.
+     *
+     * @param filter
+     * @param group
+     * @return Cursor
+     */
+    public Cursor getLoyaltyCardCursor(final String filter, Group group)
+    {
+        String actualFilter = String.format("%%%s%%", filter);
+        String[] selectionArgs = { actualFilter, actualFilter };
+        StringBuilder groupFilter = new StringBuilder();
+        String limitString = "";
+
         SQLiteDatabase db = getReadableDatabase();
-        Cursor res =  db.rawQuery("select * from " + LoyaltyCardDbIds.TABLE +
-                " ORDER BY " + LoyaltyCardDbIds.STORE, null);
+
+        if (group != null) {
+            List<Integer> allowedIds = getGroupCardIds(group._id);
+
+            // Empty group
+            if (allowedIds.size() > 0) {
+                groupFilter.append("AND (");
+
+                for (int i = 0; i < allowedIds.size(); i++) {
+                    groupFilter.append(LoyaltyCardDbIds.ID + " = " + allowedIds.get(i));
+                    if (i != allowedIds.size() - 1) {
+                        groupFilter.append(" OR ");
+                    }
+                }
+                groupFilter.append(") ");
+            } else {
+                limitString = "LIMIT 0";
+            }
+        }
+
+        Cursor res = db.rawQuery("select * from " + LoyaltyCardDbIds.TABLE +
+                " WHERE (" + LoyaltyCardDbIds.STORE + "  LIKE ? " +
+                " OR " + LoyaltyCardDbIds.NOTE + " LIKE ? )" +
+                groupFilter.toString() +
+                " ORDER BY " + LoyaltyCardDbIds.STAR_STATUS + " DESC," + LoyaltyCardDbIds.STORE + " COLLATE NOCASE ASC " +
+                limitString, selectionArgs, null);
+
         return res;
     }
 
     public int getLoyaltyCardCount()
     {
+        // An empty string will match everything
+        return getLoyaltyCardCount("");
+    }
+
+    /**
+     * Returns the amount of loyalty cards with the filter text in either the store or note.
+     *
+     * @param filter
+     * @return Integer
+     */
+    public int getLoyaltyCardCount(String filter)
+    {
+        String actualFilter = String.format("%%%s%%", filter);
+        String[] selectionArgs = { actualFilter, actualFilter };
+
         SQLiteDatabase db = getReadableDatabase();
-        Cursor data =  db.rawQuery("SELECT Count(*) FROM " + LoyaltyCardDbIds.TABLE, null);
+        Cursor data =  db.rawQuery("SELECT Count(*) FROM " + LoyaltyCardDbIds.TABLE +
+                " WHERE " + LoyaltyCardDbIds.STORE + "  LIKE ? " +
+                " OR " + LoyaltyCardDbIds.NOTE + " LIKE ? "
+                , selectionArgs, null);
+
+        int numItems = 0;
+
+        if(data.getCount() == 1)
+        {
+            data.moveToFirst();
+            numItems = data.getInt(0);
+        }
+
+        data.close();
+
+        return numItems;
+    }
+
+    /**
+     * Returns a cursor to all groups.
+     *
+     * @return Cursor
+     */
+    public Cursor getGroupCursor()
+    {
+        SQLiteDatabase db = getReadableDatabase();
+
+        Cursor res = db.rawQuery("select * from " + LoyaltyCardDbGroups.TABLE +
+                " ORDER BY " + LoyaltyCardDbGroups.ORDER + " ASC," + LoyaltyCardDbGroups.ID + " COLLATE NOCASE ASC", null, null);
+        return res;
+    }
+
+    public List<Group> getGroups() {
+        Cursor data = getGroupCursor();
+
+        List<Group> groups = new ArrayList<>();
+
+        if (!data.moveToFirst()) {
+            data.close();
+            return groups;
+        }
+
+        groups.add(Group.toGroup(data));
+
+        while (data.moveToNext()) {
+            groups.add(Group.toGroup(data));
+        }
+
+        data.close();
+
+        return groups;
+    }
+
+    public void reorderGroups(final List<Group> groups)
+    {
+        Integer order = 0;
+
+        SQLiteDatabase db = getWritableDatabase();
+        ContentValues contentValues;
+
+        for (Group group : groups)
+        {
+            contentValues = new ContentValues();
+            contentValues.put(LoyaltyCardDbGroups.ORDER, order);
+
+            db.update(LoyaltyCardDbGroups.TABLE, contentValues,
+                    LoyaltyCardDbGroups.ID + "=?",
+                    new String[]{group._id});
+
+            order++;
+        }
+    }
+
+    public Group getGroup(final String groupName)
+    {
+        SQLiteDatabase db = getReadableDatabase();
+        Cursor data = db.rawQuery("select * from " + LoyaltyCardDbGroups.TABLE +
+                " where " + LoyaltyCardDbGroups.ID + "=?", new String[]{groupName});
+
+        Group group = null;
+
+        if(data.getCount() == 1)
+        {
+            data.moveToFirst();
+
+            group = Group.toGroup(data);
+        }
+
+        data.close();
+
+        return group;
+    }
+
+    public int getGroupCount()
+    {
+        SQLiteDatabase db = getReadableDatabase();
+        Cursor data =  db.rawQuery("SELECT Count(*) FROM " + LoyaltyCardDbGroups.TABLE, null);
+
+        int numItems = 0;
+
+        if(data.getCount() == 1)
+        {
+            data.moveToFirst();
+            numItems = data.getInt(0);
+        }
+
+        data.close();
+
+        return numItems;
+    }
+
+    public List<Integer> getGroupCardIds(final String groupName)
+    {
+        SQLiteDatabase db = getReadableDatabase();
+        Cursor data =  db.rawQuery("SELECT " + LoyaltyCardDbIdsGroups.cardID +
+                " FROM " + LoyaltyCardDbIdsGroups.TABLE +
+                " WHERE " + LoyaltyCardDbIdsGroups.groupID + " =? ", new String[]{groupName});
+
+        List<Integer> cardIds = new ArrayList<>();
+
+        if (!data.moveToFirst()) {
+            return cardIds;
+        }
+
+        cardIds.add(data.getInt(0));
+
+        while (data.moveToNext()) {
+            cardIds.add(data.getInt(0));
+        }
+
+        data.close();
+
+        return cardIds;
+    }
+
+    public long insertGroup(final String name)
+    {
+        if (name.isEmpty()) return -1;
+
+        SQLiteDatabase db = getWritableDatabase();
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(LoyaltyCardDbGroups.ID, name);
+        contentValues.put(LoyaltyCardDbGroups.ORDER, getGroupCount());
+        final long newId = db.insert(LoyaltyCardDbGroups.TABLE, null, contentValues);
+        return newId;
+    }
+
+    public boolean insertGroup(final SQLiteDatabase db, final String name)
+    {
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(LoyaltyCardDbGroups.ID, name);
+        contentValues.put(LoyaltyCardDbGroups.ORDER, getGroupCount());
+        final long newId = db.insert(LoyaltyCardDbGroups.TABLE, null, contentValues);
+        return (newId != -1);
+    }
+
+    public boolean updateGroup(final String groupName, final String newName)
+    {
+        if (newName.isEmpty()) return false;
+
+        boolean success = false;
+
+        SQLiteDatabase db = getWritableDatabase();
+        ContentValues groupContentValues = new ContentValues();
+        groupContentValues.put(LoyaltyCardDbGroups.ID, newName);
+
+        ContentValues lookupContentValues = new ContentValues();
+        lookupContentValues.put(LoyaltyCardDbIdsGroups.groupID, newName);
+
+        db.beginTransaction();
+        try {
+            // Update group name
+            int groupsChanged = db.update(LoyaltyCardDbGroups.TABLE, groupContentValues,
+                    LoyaltyCardDbGroups.ID + "=?",
+                    new String[]{groupName});
+
+            // Also update lookup tables
+            db.update(LoyaltyCardDbIdsGroups.TABLE, lookupContentValues,
+                    LoyaltyCardDbIdsGroups.groupID + "=?",
+                    new String[]{groupName});
+
+            if (groupsChanged == 1) {
+                db.setTransactionSuccessful();
+                success = true;
+            }
+        } catch (SQLiteException e) {
+        } finally {
+            db.endTransaction();
+        }
+
+        return success;
+    }
+
+    public boolean deleteGroup(final String groupName)
+    {
+        boolean success = false;
+
+        SQLiteDatabase db = getWritableDatabase();
+
+        db.beginTransaction();
+        try {
+            // Delete group
+            int groupsDeleted = db.delete(LoyaltyCardDbGroups.TABLE,
+                    LoyaltyCardDbGroups.ID + " = ? ",
+                    new String[]{groupName});
+
+            // And delete lookup table entries associated with this group
+            db.delete(LoyaltyCardDbIdsGroups.TABLE,
+                    LoyaltyCardDbIdsGroups.groupID + " = ? ",
+                    new String[]{groupName});
+
+            if (groupsDeleted == 1) {
+                db.setTransactionSuccessful();
+                success = true;
+            }
+        } finally {
+            db.endTransaction();
+        }
+
+        return success;
+    }
+
+    public int getGroupCardCount(final String groupName)
+    {
+        SQLiteDatabase db = getReadableDatabase();
+
+        Cursor data =  db.rawQuery("SELECT Count(*) FROM " + LoyaltyCardDbIdsGroups.TABLE +
+                " where " + LoyaltyCardDbIdsGroups.groupID + "=?",
+                new String[]{groupName});
 
         int numItems = 0;
 

app/src/main/java/protect/card_locker/Group.java

@@ -0,0 +1,20 @@
+package protect.card_locker;
+
+import android.database.Cursor;
+
+public class Group
+{
+    public final String _id;
+
+    public Group(final String _id)
+    {
+        this._id = _id;
+    }
+
+    public static Group toGroup(Cursor cursor)
+    {
+        String _id = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbGroups.ID));
+
+        return new Group(_id);
+    }
+}

app/src/main/java/protect/card_locker/GroupCursorAdapter.java

@@ -0,0 +1,56 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CursorAdapter;
+import android.widget.TextView;
+
+import protect.card_locker.preferences.Settings;
+
+class GroupCursorAdapter extends CursorAdapter
+{
+    Settings settings;
+    DBHelper db;
+
+    public GroupCursorAdapter(Context context, Cursor cursor)
+    {
+        super(context, cursor, 0);
+        settings = new Settings(context);
+
+        db = new DBHelper(context);
+    }
+
+    // The newView method is used to inflate a new view and return it,
+    // you don't bind any data to the view at this point.
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent)
+    {
+        return LayoutInflater.from(context).inflate(R.layout.group_layout, parent, false);
+    }
+
+    // The bindView method is used to bind all data to a given view
+    // such as setting the text on a TextView.
+    @Override
+    public void bindView(View view, Context context, Cursor cursor)
+    {
+        // Find fields to populate in inflated template
+        TextView nameField = view.findViewById(R.id.name);
+        TextView countField = view.findViewById(R.id.cardCount);
+
+        // Extract properties from cursor
+        Group group = Group.toGroup(cursor);
+
+        Integer groupCardCount = db.getGroupCardCount(group._id);
+
+        // Populate fields with extracted properties
+        nameField.setText(group._id);
+
+        countField.setText(context.getResources().getQuantityString(R.plurals.groupCardCount, groupCardCount, groupCardCount));
+
+        nameField.setTextSize(settings.getCardTitleListFontSize());
+        countField.setTextSize(settings.getCardNoteListFontSize());
+    }
+}

app/src/main/java/protect/card_locker/ImportExportActivity.java

@@ -2,24 +2,20 @@ package protect.card_locker;
 
 import android.Manifest;
 import android.content.ActivityNotFoundException;
-import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.database.Cursor;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.os.Environment;
-import android.provider.OpenableColumns;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.content.ContextCompat;
-import android.support.v4.content.FileProvider;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.View;
@@ -29,27 +25,26 @@ import android.widget.Toast;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
 import java.io.InputStream;
-import java.util.List;
+import java.io.OutputStream;
 
 public class ImportExportActivity extends AppCompatActivity
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
 
     private static final int PERMISSIONS_EXTERNAL_STORAGE = 1;
-    private static final int CHOOSE_EXPORT_FILE = 2;
+    private static final int CHOOSE_EXPORT_LOCATION = 2;
+    private static final int CHOOSE_EXPORTED_FILE = 3;
 
     private ImportExportTask importExporter;
 
-    private final File sdcardDir = Environment.getExternalStorageDirectory();
-    private final File exportFile = new File(sdcardDir, "LoyaltyCardKeychain.csv");
-
     @Override
     protected void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.import_export_activity);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         ActionBar actionBar = getSupportActionBar();
         if(actionBar != null)
@@ -71,83 +66,47 @@ public class ImportExportActivity extends AppCompatActivity
                     PERMISSIONS_EXTERNAL_STORAGE);
         }
 
+        // Check that there is a file manager available
+        final Intent intentCreateDocumentAction = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+        intentCreateDocumentAction.addCategory(Intent.CATEGORY_OPENABLE);
+        intentCreateDocumentAction.setType("text/csv");
+        intentCreateDocumentAction.putExtra(Intent.EXTRA_TITLE, "Catima.csv");
 
-        Button exportButton = (Button)findViewById(R.id.exportButton);
+        Button exportButton = findViewById(R.id.exportButton);
         exportButton.setOnClickListener(new View.OnClickListener()
         {
             @Override
             public void onClick(View v)
             {
-                startExport();
+                chooseFileWithIntent(intentCreateDocumentAction, CHOOSE_EXPORT_LOCATION);
             }
         });
 
+        // Check that there is a file manager available
+        final Intent intentGetContentAction = new Intent(Intent.ACTION_GET_CONTENT);
+        intentGetContentAction.addCategory(Intent.CATEGORY_OPENABLE);
+        intentGetContentAction.setType("*/*");
 
-        // Check that there is an activity that can bring up a file chooser
-        final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
-
-        Button importFilesystem = (Button) findViewById(R.id.importOptionFilesystemButton);
+        Button importFilesystem = findViewById(R.id.importOptionFilesystemButton);
         importFilesystem.setOnClickListener(new View.OnClickListener()
         {
             @Override
             public void onClick(View v)
             {
-                chooseFileWithIntent(intentPickAction);
+                chooseFileWithIntent(intentGetContentAction, CHOOSE_EXPORTED_FILE);
             }
         });
 
-        if(isCallable(getApplicationContext(), intentPickAction) == false)
-        {
-            findViewById(R.id.dividerImportFilesystem).setVisibility(View.GONE);
-            findViewById(R.id.importOptionFilesystemTitle).setVisibility(View.GONE);
-            findViewById(R.id.importOptionFilesystemExplanation).setVisibility(View.GONE);
-            importFilesystem.setVisibility(View.GONE);
-        }
+        // Check that there is an app that data can be imported from
+        final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
 
-
-        // Check that there is an application that can find content
-        final Intent intentGetContentAction = new Intent(Intent.ACTION_GET_CONTENT);
-        intentGetContentAction.addCategory(Intent.CATEGORY_OPENABLE);
-        intentGetContentAction.setType("*/*");
-
-        Button importApplication = (Button) findViewById(R.id.importOptionApplicationButton);
+        Button importApplication = findViewById(R.id.importOptionApplicationButton);
         importApplication.setOnClickListener(new View.OnClickListener()
         {
             @Override
             public void onClick(View v)
             {
-                chooseFileWithIntent(intentGetContentAction);
-            }
-        });
-
-        if(isCallable(getApplicationContext(), intentGetContentAction) == false)
-        {
-            findViewById(R.id.dividerImportApplication).setVisibility(View.GONE);
-            findViewById(R.id.importOptionApplicationTitle).setVisibility(View.GONE);
-            findViewById(R.id.importOptionApplicationExplanation).setVisibility(View.GONE);
-            importApplication.setVisibility(View.GONE);
-        }
-
-
-        // This option, to import from the fixed location, should always be present
-
-        Button importButton = (Button)findViewById(R.id.importOptionFixedButton);
-        importButton.setOnClickListener(new View.OnClickListener()
-        {
-            @Override
-            public void onClick(View v)
-            {
-                Uri uri = Uri.fromFile(exportFile);
-                try
-                {
-                    FileInputStream stream = new FileInputStream(exportFile);
-                    startImport(stream, uri);
-                }
-                catch(FileNotFoundException e)
-                {
-                    Log.e(TAG, "Could not import file " + exportFile.getAbsolutePath(), e);
-                    onImportComplete(false, uri);
-                }
+                chooseFileWithIntent(intentPickAction, CHOOSE_EXPORTED_FILE);
             }
         });
     }
@@ -168,19 +127,19 @@ public class ImportExportActivity extends AppCompatActivity
         importExporter.execute();
     }
 
-    private void startExport()
+    private void startExport(final OutputStream target, final Uri targetUri)
     {
         ImportExportTask.TaskCompleteListener listener = new ImportExportTask.TaskCompleteListener()
         {
             @Override
             public void onTaskComplete(boolean success)
             {
-                onExportComplete(success, exportFile);
+                onExportComplete(success, targetUri);
             }
         };
 
         importExporter = new ImportExportTask(ImportExportActivity.this,
-                DataFormat.CSV, exportFile, listener);
+                DataFormat.CSV, target, listener);
         importExporter.execute();
     }
 
@@ -235,33 +194,6 @@ public class ImportExportActivity extends AppCompatActivity
         return super.onOptionsItemSelected(item);
     }
 
-    private String fileNameFromUri(Uri uri)
-    {
-        if("file".equals(uri.getScheme()))
-        {
-            return uri.getPath();
-        }
-
-        Cursor returnCursor =
-                getContentResolver().query(uri, null, null, null, null);
-        if(returnCursor == null)
-        {
-            return null;
-        }
-
-        int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
-        if(returnCursor.moveToFirst() == false)
-        {
-            returnCursor.close();
-            return null;
-        }
-
-        String name = returnCursor.getString(nameIndex);
-        returnCursor.close();
-
-        return name;
-    }
-
     private void onImportComplete(boolean success, Uri path)
     {
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
@@ -275,18 +207,9 @@ public class ImportExportActivity extends AppCompatActivity
             builder.setTitle(R.string.importFailedTitle);
         }
 
-        int messageId = success ? R.string.importedFrom : R.string.importFailed;
+        int messageId = success ? R.string.importSuccessful : R.string.importFailed;
+        final String message = getResources().getString(messageId);
 
-        final String template = getResources().getString(messageId);
-
-        // Get the filename of the file being imported
-        String filename = fileNameFromUri(path);
-        if(filename == null)
-        {
-            filename = "(unknown)";
-        }
-
-        final String message = String.format(template, filename);
         builder.setMessage(message);
         builder.setNeutralButton(R.string.ok, new DialogInterface.OnClickListener()
         {
@@ -300,7 +223,7 @@ public class ImportExportActivity extends AppCompatActivity
         builder.create().show();
     }
 
-    private void onExportComplete(boolean success, final File path)
+    private void onExportComplete(boolean success, final Uri path)
     {
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
 
@@ -313,10 +236,9 @@ public class ImportExportActivity extends AppCompatActivity
             builder.setTitle(R.string.exportFailedTitle);
         }
 
-        int messageId = success ? R.string.exportedTo : R.string.exportFailed;
+        int messageId = success ? R.string.exportSuccessful : R.string.exportFailed;
+        final String message = getResources().getString(messageId);
 
-        final String template = getResources().getString(messageId);
-        final String message = String.format(template, path.getAbsolutePath());
         builder.setMessage(message);
         builder.setNeutralButton(R.string.ok, new DialogInterface.OnClickListener()
         {
@@ -336,9 +258,8 @@ public class ImportExportActivity extends AppCompatActivity
                 @Override
                 public void onClick(DialogInterface dialog, int which)
                 {
-                    Uri outputUri = FileProvider.getUriForFile(ImportExportActivity.this, BuildConfig.APPLICATION_ID, path);
                     Intent sendIntent = new Intent(Intent.ACTION_SEND);
-                    sendIntent.putExtra(Intent.EXTRA_STREAM, outputUri);
+                    sendIntent.putExtra(Intent.EXTRA_STREAM, path);
                     sendIntent.setType("text/csv");
 
                     // set flag to give temporary permission to external app to use the FileProvider
@@ -355,39 +276,15 @@ public class ImportExportActivity extends AppCompatActivity
         builder.create().show();
     }
 
-    /**
-     * Determines if there is at least one activity that can perform the given intent
-     */
-    private boolean isCallable(Context context, final Intent intent)
-    {
-        PackageManager manager = context.getPackageManager();
-        if(manager == null)
-        {
-            return false;
-        }
-
-        List<ResolveInfo> list = manager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
-
-        for(ResolveInfo info : list)
-        {
-            if(info.activityInfo.exported)
-            {
-                // There is one activity which is available to be called
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    private void chooseFileWithIntent(Intent intent)
+    private void chooseFileWithIntent(Intent intent, int requestCode)
     {
         try
         {
-            startActivityForResult(intent, CHOOSE_EXPORT_FILE);
+            startActivityForResult(intent, requestCode);
         }
         catch (ActivityNotFoundException e)
         {
+            Toast.makeText(getApplicationContext(), R.string.failedOpeningFileManager, Toast.LENGTH_LONG).show();
             Log.e(TAG, "No activity found to handle intent", e);
         }
     }
@@ -397,7 +294,7 @@ public class ImportExportActivity extends AppCompatActivity
     {
         super.onActivityResult(requestCode, resultCode, data);
 
-        if (resultCode != RESULT_OK || requestCode != CHOOSE_EXPORT_FILE)
+        if (resultCode != RESULT_OK || (requestCode != CHOOSE_EXPORT_LOCATION && requestCode != CHOOSE_EXPORTED_FILE))
         {
             Log.w(TAG, "Failed onActivityResult(), result=" + resultCode);
             return;
@@ -412,13 +309,48 @@ public class ImportExportActivity extends AppCompatActivity
 
         try
         {
-            InputStream reader = getContentResolver().openInputStream(uri);
-            Log.e(TAG, "Starting file import with: " + uri.toString());
-            startImport(reader, uri);
+            if (requestCode == CHOOSE_EXPORT_LOCATION)
+            {
+                OutputStream writer;
+                if (uri.getScheme() != null)
+                {
+                    writer = getContentResolver().openOutputStream(uri);
+                }
+                else
+                {
+                    writer = new FileOutputStream(new File(uri.toString()));
+                }
+
+                Log.e(TAG, "Starting file export with: " + uri.toString());
+                startExport(writer, uri);
+            }
+            else
+            {
+                InputStream reader;
+                if(uri.getScheme() != null)
+                {
+                    reader = getContentResolver().openInputStream(uri);
+                }
+                else
+                {
+                    reader = new FileInputStream(new File(uri.toString()));
+                }
+
+                Log.e(TAG, "Starting file export with: " + uri.toString());
+                startImport(reader, uri);
+            }
         }
-        catch (FileNotFoundException e)
+        catch(FileNotFoundException e)
         {
-            Log.e(TAG, "Failed to import file: " + uri.toString(), e);
+            Log.e(TAG, "Failed to import/export file: " + uri.toString(), e);
+            if (requestCode == CHOOSE_EXPORT_LOCATION)
+            {
+                onExportComplete(false, uri);
+            }
+            else
+            {
+                onImportComplete(false, uri);
+            }
         }
     }
 }

app/src/main/java/protect/card_locker/ImportExportTask.java

@@ -4,27 +4,23 @@ import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.os.AsyncTask;
-import android.os.Environment;
 import android.util.Log;
-import android.widget.Toast;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.nio.charset.Charset;
 
 class ImportExportTask extends AsyncTask<Void, Void, Boolean>
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
 
     private Activity activity;
     private boolean doImport;
     private DataFormat format;
-    private File target;
+    private OutputStream outputStream;
     private InputStream inputStream;
     private TaskCompleteListener listener;
 
@@ -33,14 +29,14 @@ class ImportExportTask extends AsyncTask<Void, Void, Boolean>
     /**
      * Constructor which will setup a task for exporting to the given file
      */
-    ImportExportTask(Activity activity, DataFormat format, File target,
+    ImportExportTask(Activity activity, DataFormat format, OutputStream output,
             TaskCompleteListener listener)
     {
         super();
         this.activity = activity;
         this.doImport = false;
         this.format = format;
-        this.target = target;
+        this.outputStream = output;
         this.listener = listener;
     }
 
@@ -78,14 +74,13 @@ class ImportExportTask extends AsyncTask<Void, Void, Boolean>
         return result;
     }
 
-    private boolean performExport(File exportFile, DBHelper db)
+    private boolean performExport(OutputStream stream, DBHelper db)
     {
         boolean result = false;
 
         try
         {
-            FileOutputStream fileWriter = new FileOutputStream(exportFile);
-            OutputStreamWriter writer = new OutputStreamWriter(fileWriter, Charset.forName("UTF-8"));
+            OutputStreamWriter writer = new OutputStreamWriter(stream, Charset.forName("UTF-8"));
             result = MultiFormatExporter.exportData(db, writer, format);
             writer.close();
         }
@@ -94,7 +89,7 @@ class ImportExportTask extends AsyncTask<Void, Void, Boolean>
             Log.e(TAG, "Unable to export file", e);
         }
 
-        Log.i(TAG, "Export of '" + exportFile.getAbsolutePath() + "' result: " + result);
+        Log.i(TAG, "Export result: " + result);
 
         return result;
     }
@@ -127,7 +122,7 @@ class ImportExportTask extends AsyncTask<Void, Void, Boolean>
         }
         else
         {
-            result = performExport(target, db);
+            result = performExport(outputStream, db);
         }
 
         return result;

app/src/main/java/protect/card_locker/ImportURIHelper.java

@@ -0,0 +1,127 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import java.io.InvalidObjectException;
+import java.math.BigDecimal;
+import java.util.Currency;
+import java.util.Date;
+
+public class ImportURIHelper {
+    private static final String STORE = DBHelper.LoyaltyCardDbIds.STORE;
+    private static final String NOTE = DBHelper.LoyaltyCardDbIds.NOTE;
+    private static final String EXPIRY = DBHelper.LoyaltyCardDbIds.EXPIRY;
+    private static final String BALANCE = DBHelper.LoyaltyCardDbIds.BALANCE;
+    private static final String BALANCE_TYPE = DBHelper.LoyaltyCardDbIds.BALANCE_TYPE;
+    private static final String CARD_ID = DBHelper.LoyaltyCardDbIds.CARD_ID;
+    private static final String BARCODE_TYPE = DBHelper.LoyaltyCardDbIds.BARCODE_TYPE;
+
+    private static final String HEADER_COLOR = DBHelper.LoyaltyCardDbIds.HEADER_COLOR;
+
+    private final Context context;
+    private final String host;
+    private final String path;
+    private final String oldHost;
+    private final String oldPath;
+    private final String shareText;
+
+    public ImportURIHelper(Context context) {
+        this.context = context;
+        host = context.getResources().getString(R.string.intent_import_card_from_url_host);
+        path = context.getResources().getString(R.string.intent_import_card_from_url_path_prefix);
+        oldHost = "brarcher.github.io";
+        oldPath = "/loyalty-card-locker/share";
+        shareText = context.getResources().getString(R.string.intent_import_card_from_url_share_text);
+    }
+
+    private boolean isImportUri(Uri uri) {
+        return (uri.getHost().equals(host) && uri.getPath().equals(path)) || (uri.getHost().equals(oldHost) && uri.getPath().equals(oldPath));
+    }
+
+    public LoyaltyCard parse(Uri uri) throws InvalidObjectException {
+        if(!isImportUri(uri)) {
+            throw new InvalidObjectException("Not an import URI");
+        }
+
+        try {
+            // These values are allowed to be null
+            Date expiry = null;
+            BigDecimal balance = new BigDecimal("0");
+            Currency balanceType = null;
+            Integer headerColor = null;
+            Integer headerTextColor = null;
+
+            String store = uri.getQueryParameter(STORE);
+            String note = uri.getQueryParameter(NOTE);
+            String cardId = uri.getQueryParameter(CARD_ID);
+            String barcodeType = uri.getQueryParameter(BARCODE_TYPE);
+            if (store == null || note == null || cardId == null || barcodeType == null) throw new InvalidObjectException("Not a valid import URI");
+
+            String unparsedBalance = uri.getQueryParameter(BALANCE);
+            if(unparsedBalance != null && !unparsedBalance.equals(""))
+            {
+                balance = new BigDecimal(unparsedBalance);
+            }
+            String unparsedBalanceType = uri.getQueryParameter(BALANCE_TYPE);
+            if (unparsedBalanceType != null && !unparsedBalanceType.equals(""))
+            {
+                balanceType = Currency.getInstance(unparsedBalanceType);
+            }
+            String unparsedExpiry = uri.getQueryParameter(EXPIRY);
+            if(unparsedExpiry != null && !unparsedExpiry.equals(""))
+            {
+                expiry = new Date(Long.parseLong(unparsedExpiry));
+            }
+
+            String unparsedHeaderColor = uri.getQueryParameter(HEADER_COLOR);
+            if(unparsedHeaderColor != null)
+            {
+                headerColor = Integer.parseInt(unparsedHeaderColor);
+            }
+
+            return new LoyaltyCard(-1, store, note, expiry, balance, balanceType, cardId, barcodeType, headerColor, headerTextColor, 0);
+        } catch (NullPointerException | NumberFormatException ex) {
+            throw new InvalidObjectException("Not a valid import URI");
+        }
+    }
+
+    // Protected for usage in tests
+    protected Uri toUri(LoyaltyCard loyaltyCard) {
+        Uri.Builder uriBuilder = new Uri.Builder();
+        uriBuilder.scheme("https");
+        uriBuilder.authority(host);
+        uriBuilder.path(path);
+        uriBuilder.appendQueryParameter(STORE, loyaltyCard.store);
+        uriBuilder.appendQueryParameter(NOTE, loyaltyCard.note);
+        uriBuilder.appendQueryParameter(BALANCE, loyaltyCard.balance.toString());
+        if (loyaltyCard.balanceType != null) {
+            uriBuilder.appendQueryParameter(BALANCE_TYPE, loyaltyCard.balanceType.getCurrencyCode());
+        }
+        if (loyaltyCard.expiry != null) {
+            uriBuilder.appendQueryParameter(EXPIRY, String.valueOf(loyaltyCard.expiry.getTime()));
+        }
+        uriBuilder.appendQueryParameter(CARD_ID, loyaltyCard.cardId);
+        uriBuilder.appendQueryParameter(BARCODE_TYPE, loyaltyCard.barcodeType);
+        if(loyaltyCard.headerColor != null)
+        {
+            uriBuilder.appendQueryParameter(HEADER_COLOR, loyaltyCard.headerColor.toString());
+        }
+        //StarStatus will not be exported
+        return uriBuilder.build();
+    }
+
+    private void startShareIntent(Uri uri) {
+        Intent sendIntent = new Intent();
+        sendIntent.setAction(Intent.ACTION_SEND);
+        sendIntent.putExtra(Intent.EXTRA_TEXT, shareText + "\n" + uri.toString());
+        sendIntent.setType("text/plain");
+
+        Intent shareIntent = Intent.createChooser(sendIntent, null);
+        context.startActivity(shareIntent);
+    }
+
+    public void startShareIntent(LoyaltyCard loyaltyCard) {
+        startShareIntent(toUri(loyaltyCard));
+    }
+}

app/src/main/java/protect/card_locker/LetterBitmap.java

@@ -0,0 +1,140 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.Typeface;
+import android.text.TextPaint;
+
+/**
+ * Original from https://github.com/andOTP/andOTP/blob/master/app/src/main/java/org/shadowice/flocke/andotp/Utilities/LetterBitmap.java
+ * which was originally from http://stackoverflow.com/questions/23122088/colored-boxed-with-letters-a-la-gmail
+ * Used to create a {@link Bitmap} that contains a letter used in the English
+ * alphabet or digit, if there is no letter or digit available, a default image
+ * is shown instead.
+ */
+class LetterBitmap
+{
+
+    /**
+     * The number of available tile colors
+     */
+    private static final int NUM_OF_TILE_COLORS = 8;
+    /**
+     * The letter bitmap
+     */
+    private final Bitmap mBitmap;
+    /**
+     * The background color of the letter bitmap
+     */
+    private final Integer mColor;
+
+    /**
+     * Constructor for <code>LetterTileProvider</code>
+     *
+     * @param context The {@link Context} to use
+     * @param displayName The name used to create the letter for the tile
+     * @param key         The key used to generate the background color for the tile
+     * @param tileLetterFontSize The font size used to display the letter
+     * @param width       The desired width of the tile
+     * @param height      The desired height of the tile
+     * @param backgroundColor  (optional) color to use for background.
+     * @param textColor  (optional) color to use for text.
+     */
+    public LetterBitmap(Context context, String displayName, String key, int tileLetterFontSize,
+                        int width, int height, Integer backgroundColor, Integer textColor)
+    {
+        TextPaint paint = new TextPaint();
+        paint.setTypeface(Typeface.create("sans-serif-light", Typeface.BOLD));
+
+        if(textColor != null)
+        {
+            paint.setColor(textColor);
+        }
+        else
+        {
+            paint.setColor(Color.WHITE);
+        }
+
+        paint.setTextAlign(Paint.Align.CENTER);
+        paint.setAntiAlias(true);
+
+        if(backgroundColor == null)
+        {
+            mColor = getDefaultColor(context, key);
+        }
+        else
+        {
+            mColor = backgroundColor;
+        }
+
+        mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+        String firstChar = displayName.substring(0, 1);
+
+        final Canvas c = new Canvas();
+        c.setBitmap(mBitmap);
+        c.drawColor(mColor);
+
+        char [] firstCharArray = new char[1];
+        firstCharArray[0] = firstChar.toUpperCase().charAt(0);
+        paint.setTextSize(tileLetterFontSize);
+
+        // The bounds that enclose the letter
+        Rect bounds = new Rect();
+
+        paint.getTextBounds(firstCharArray, 0, 1, bounds);
+        c.drawText(firstCharArray, 0, 1, width / 2.0f, height / 2.0f
+                + (bounds.bottom - bounds.top) / 2.0f, paint);
+    }
+
+    /**
+     * @return A {@link Bitmap} that contains a letter used in the English
+     * alphabet or digit, if there is no letter or digit available, a
+     * default image is shown instead
+     */
+    public Bitmap getLetterTile()
+    {
+        return mBitmap;
+    }
+
+    /**
+     * @return background color used for letter title.
+     */
+    public int getBackgroundColor()
+    {
+        return mColor;
+    }
+
+    /**
+     * @param key The key used to generate the tile color
+     * @return A new or previously chosen color for <code>key</code> used as the
+     * tile background color
+     */
+    private static int pickColor(String key, TypedArray colors)
+    {
+        // String.hashCode() is not supposed to change across java versions, so
+        // this should guarantee the same key always maps to the same color
+        final int color = Math.abs(key.hashCode()) % NUM_OF_TILE_COLORS;
+        return colors.getColor(color, Color.BLACK);
+    }
+
+    /**
+     * Determine the color which the letter tile will use if no default
+     * color is provided.
+     */
+    public static int getDefaultColor(Context context, String key)
+    {
+        final Resources res = context.getResources();
+
+        TypedArray colors = res.obtainTypedArray(R.array.letter_tile_colors);
+        int color = pickColor(key, colors);
+        colors.recycle();
+
+        return color;
+    }
+}

app/src/main/java/protect/card_locker/LoyaltyCard.java

@@ -2,21 +2,47 @@ package protect.card_locker;
 
 import android.database.Cursor;
 
+import java.math.BigDecimal;
+import java.util.Currency;
+import java.util.Date;
+
+import androidx.annotation.Nullable;
+
 public class LoyaltyCard
 {
     public final int id;
     public final String store;
     public final String note;
+    public final Date expiry;
+    public final BigDecimal balance;
+    public final Currency balanceType;
     public final String cardId;
     public final String barcodeType;
 
-    public LoyaltyCard(final int id, final String store, final String note, final String cardId, final String barcodeType)
+    @Nullable
+    public final Integer headerColor;
+
+    @Nullable
+    public final Integer headerTextColor;
+
+    public final int starStatus;
+
+    public LoyaltyCard(final int id, final String store, final String note, final Date expiry,
+                       final BigDecimal balance, final Currency balanceType, final String cardId,
+                       final String barcodeType, final Integer headerColor, final Integer headerTextColor,
+                       final int starStatus)
     {
         this.id = id;
         this.store = store;
         this.note = note;
+        this.expiry = expiry;
+        this.balance = balance;
+        this.balanceType = balanceType;
         this.cardId = cardId;
         this.barcodeType = barcodeType;
+        this.headerColor = headerColor;
+        this.headerTextColor = headerTextColor;
+        this.starStatus = starStatus;
     }
 
     public static LoyaltyCard toLoyaltyCard(Cursor cursor)
@@ -24,9 +50,41 @@ public class LoyaltyCard
         int id = cursor.getInt(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.ID));
         String store = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.STORE));
         String note = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.NOTE));
+        long expiryLong = cursor.getLong(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.EXPIRY));
+        BigDecimal balance = new BigDecimal(cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.BALANCE)));
         String cardId = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.CARD_ID));
         String barcodeType = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.BARCODE_TYPE));
+        int starred = cursor.getInt(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.STAR_STATUS));
 
-        return new LoyaltyCard(id, store, note, cardId, barcodeType);
+        int balanceTypeColumn = cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.BALANCE_TYPE);
+        int headerColorColumn = cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.HEADER_COLOR);
+        int headerTextColorColumn = cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.HEADER_TEXT_COLOR);
+
+        Currency balanceType = null;
+        Date expiry = null;
+        Integer headerColor = null;
+        Integer headerTextColor = null;
+
+        if (cursor.isNull(balanceTypeColumn) == false)
+        {
+            balanceType = Currency.getInstance(cursor.getString(balanceTypeColumn));
+        }
+
+        if(expiryLong > 0)
+        {
+            expiry = new Date(expiryLong);
+        }
+
+        if(cursor.isNull(headerColorColumn) == false)
+        {
+            headerColor = cursor.getInt(headerColorColumn);
+        }
+
+        if(cursor.isNull(headerTextColorColumn) == false)
+        {
+            headerTextColor = cursor.getInt(headerTextColorColumn);
+        }
+
+        return new LoyaltyCard(id, store, note, expiry, balance, balanceType, cardId, barcodeType, headerColor, headerTextColor, starred);
     }
 }

app/src/main/java/protect/card_locker/LoyaltyCardCursorAdapter.java

@@ -6,13 +6,23 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
+import android.widget.ImageView;
 import android.widget.TextView;
 
+import java.math.BigDecimal;
+import java.text.DateFormat;
+import java.util.Date;
+
+import protect.card_locker.preferences.Settings;
+
 class LoyaltyCardCursorAdapter extends CursorAdapter
 {
+    Settings settings;
+
     public LoyaltyCardCursorAdapter(Context context, Cursor cursor)
     {
         super(context, cursor, 0);
+        settings = new Settings(context);
     }
 
     // The newView method is used to inflate a new view and return it,
@@ -29,25 +39,60 @@ class LoyaltyCardCursorAdapter extends CursorAdapter
     public void bindView(View view, Context context, Cursor cursor)
     {
         // Find fields to populate in inflated template
-        TextView storeField = (TextView) view.findViewById(R.id.store);
-        TextView cardIdField = (TextView) view.findViewById(R.id.cardId);
+        ImageView thumbnail = view.findViewById(R.id.thumbnail);
+        TextView storeField = view.findViewById(R.id.store);
+        TextView noteField = view.findViewById(R.id.note);
+        TextView balanceField = view.findViewById(R.id.balance);
+        TextView expiryField = view.findViewById(R.id.expiry);
+        ImageView star = view.findViewById(R.id.star);
 
         // Extract properties from cursor
         LoyaltyCard loyaltyCard = LoyaltyCard.toLoyaltyCard(cursor);
 
         // Populate fields with extracted properties
-        String storeAndNote = loyaltyCard.store;
-        if(loyaltyCard.note.isEmpty() == false)
+        storeField.setText(loyaltyCard.store);
+
+        storeField.setTextSize(settings.getCardTitleListFontSize());
+
+        if(!loyaltyCard.note.isEmpty())
         {
-            String storeNameAndNoteFormat = view.getResources().getString(R.string.storeNameAndNoteFormat);
-            storeAndNote = String.format(storeNameAndNoteFormat, loyaltyCard.store, loyaltyCard.note);
+            noteField.setVisibility(View.VISIBLE);
+            noteField.setText(loyaltyCard.note);
+            noteField.setTextSize(settings.getCardNoteListFontSize());
+        }
+        else
+        {
+            noteField.setVisibility(View.GONE);
         }
 
-        storeField.setText(storeAndNote);
+        if(!loyaltyCard.balance.equals(new BigDecimal("0"))) {
+            balanceField.setVisibility(View.VISIBLE);
+            balanceField.setText(context.getString(R.string.balanceSentence, Utils.formatBalance(context, loyaltyCard.balance, loyaltyCard.balanceType)));
+        }
+        else
+        {
+            balanceField.setVisibility(View.GONE);
+        }
 
-        String cardIdFormat = view.getResources().getString(R.string.cardIdFormat);
-        String cardIdLabel = view.getResources().getString(R.string.cardId);
-        String cardIdText = String.format(cardIdFormat, cardIdLabel, loyaltyCard.cardId);
-        cardIdField.setText(cardIdText);
+        if(loyaltyCard.expiry != null)
+        {
+            expiryField.setVisibility(View.VISIBLE);
+            int expiryString = R.string.expiryStateSentence;
+            if(Utils.hasExpired(loyaltyCard.expiry)) {
+                expiryString = R.string.expiryStateSentenceExpired;
+                expiryField.setTextColor(context.getResources().getColor(R.color.alert));
+            }
+            expiryField.setText(context.getString(expiryString, DateFormat.getDateInstance(DateFormat.LONG).format(loyaltyCard.expiry)));
+            expiryField.setTextSize(settings.getCardNoteListFontSize());
+        }
+        else
+        {
+            expiryField.setVisibility(View.GONE);
+        }
+
+        if (loyaltyCard.starStatus!=0) star.setVisibility(View.VISIBLE);
+            else star.setVisibility(View.GONE);
+
+        thumbnail.setImageBitmap(Utils.generateIcon(context, loyaltyCard.store, loyaltyCard.headerColor).getLetterTile());
     }
 }

app/src/main/java/protect/card_locker/LoyaltyCardEditActivity.java

@@ -0,0 +1,921 @@
+package protect.card_locker;
+
+import android.annotation.SuppressLint;
+import android.app.DatePickerDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.res.TypedArray;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+
+import com.google.android.material.chip.Chip;
+import com.google.android.material.chip.ChipGroup;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.fragment.app.DialogFragment;
+
+import android.os.LocaleList;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.ArrayAdapter;
+import android.widget.AutoCompleteTextView;
+import android.widget.Button;
+import android.widget.DatePicker;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.google.android.material.tabs.TabLayout;
+import com.google.zxing.BarcodeFormat;
+import com.jaredrummler.android.colorpicker.ColorPickerDialog;
+import com.jaredrummler.android.colorpicker.ColorPickerDialogListener;
+
+import java.io.InvalidObjectException;
+import java.math.BigDecimal;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.Currency;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+
+public class LoyaltyCardEditActivity extends AppCompatActivity
+{
+    private static final String TAG = "Catima";
+
+    TabLayout tabs;
+
+    ImageView thumbnail;
+    EditText storeFieldEdit;
+    EditText noteFieldEdit;
+    ChipGroup groupsChips;
+    AutoCompleteTextView expiryField;
+    EditText balanceField;
+    AutoCompleteTextView balanceCurrencyField;
+    TextView cardIdFieldView;
+    AutoCompleteTextView barcodeTypeField;
+    ImageView barcodeImage;
+    View barcodeImageLayout;
+    View barcodeCaptureLayout;
+
+    Button enterButton;
+
+    int loyaltyCardId;
+    boolean updateLoyaltyCard;
+    String barcodeType;
+    String cardId;
+
+    Uri importLoyaltyCardUri = null;
+    Integer headingColorValue = null;
+
+    DBHelper db;
+    ImportURIHelper importUriHelper;
+
+    boolean hasChanged = false;
+    boolean initDone = false;
+    AlertDialog confirmExitDialog = null;
+
+    boolean validBalance = true;
+
+    HashMap<String, Currency> currencies = new HashMap<>();
+
+    private void extractIntentFields(Intent intent)
+    {
+        final Bundle b = intent.getExtras();
+        loyaltyCardId = b != null ? b.getInt("id") : 0;
+        updateLoyaltyCard = b != null && b.getBoolean("update", false);
+
+        barcodeType = b != null ? b.getString("barcodeType") : null;
+        cardId = b != null ? b.getString("cardId") : null;
+
+        importLoyaltyCardUri = intent.getData();
+
+        Log.d(TAG, "View activity: id=" + loyaltyCardId
+                + ", updateLoyaltyCard=" + Boolean.toString(updateLoyaltyCard));
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.loyalty_card_edit_activity);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        extractIntentFields(getIntent());
+
+        db = new DBHelper(this);
+        importUriHelper = new ImportURIHelper(this);
+
+        for (Currency currency : Currency.getAvailableCurrencies()) {
+            currencies.put(currency.getSymbol(), currency);
+        }
+
+        tabs = findViewById(R.id.tabs);
+        thumbnail = findViewById(R.id.thumbnail);
+        storeFieldEdit = findViewById(R.id.storeNameEdit);
+        noteFieldEdit = findViewById(R.id.noteEdit);
+        groupsChips = findViewById(R.id.groupChips);
+        expiryField = findViewById(R.id.expiryField);
+        balanceField = findViewById(R.id.balanceField);
+        balanceCurrencyField = findViewById(R.id.balanceCurrencyField);
+        cardIdFieldView = findViewById(R.id.cardIdView);
+        barcodeTypeField = findViewById(R.id.barcodeTypeField);
+        barcodeImage = findViewById(R.id.barcode);
+        barcodeImageLayout = findViewById(R.id.barcodeLayout);
+        barcodeCaptureLayout = findViewById(R.id.barcodeCaptureLayout);
+
+        enterButton = findViewById(R.id.enterButton);
+
+        storeFieldEdit.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                generateIcon(s.toString());
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) { }
+        });
+
+        expiryField.addTextChangedListener(new TextWatcher() {
+            CharSequence lastValue;
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                lastValue = s;
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                if (s.toString().equals(getString(R.string.never))) {
+                    expiryField.setTag(null);
+                } else if (s.toString().equals(getString(R.string.chooseExpiryDate))) {
+                    if (!lastValue.toString().equals(getString(R.string.chooseExpiryDate))) {
+                        expiryField.setText(lastValue);
+                    };
+                    DialogFragment datePickerFragment = new DatePickerFragment(expiryField);
+                    datePickerFragment.show(getSupportFragmentManager(), "datePicker");
+                }
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                ArrayList<String> expiryList = new ArrayList<>();
+                expiryList.add(0, getString(R.string.never));
+                expiryList.add(1, getString(R.string.chooseExpiryDate));
+                ArrayAdapter<String> expiryAdapter = new ArrayAdapter<>(LoyaltyCardEditActivity.this, android.R.layout.select_dialog_item, expiryList);
+                expiryField.setAdapter(expiryAdapter);
+            }
+        });
+
+        balanceField.setOnFocusChangeListener((v, hasFocus) -> {
+            if (!hasFocus) {
+                balanceField.setText(Utils.formatBalanceWithoutCurrencySymbol((BigDecimal) balanceField.getTag(), (Currency) balanceCurrencyField.getTag()));
+            }
+        });
+
+        balanceField.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                try {
+                    BigDecimal balance = Utils.parseCurrency(s.toString());
+                    validBalance = true;
+
+                    balanceField.setTag(balance);
+                } catch (NumberFormatException e) {
+                    validBalance = false;
+                    e.printStackTrace();
+                }
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) { }
+        });
+
+        balanceCurrencyField.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                Currency currency;
+
+                if (s.toString().equals(getString(R.string.points))) {
+                    currency = null;
+                } else {
+                    currency = currencies.get(s.toString());
+                }
+
+                balanceCurrencyField.setTag(currency);
+
+                balanceField.setText(Utils.formatBalanceWithoutCurrencySymbol((BigDecimal) balanceField.getTag(), currency));
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                ArrayList<String> currencyList = new ArrayList<>(currencies.keySet());
+                Collections.sort(currencyList, (o1, o2) -> {
+                    boolean o1ascii = o1.matches("^[^a-zA-Z]*$");
+                    boolean o2ascii = o2.matches("^[^a-zA-Z]*$");
+
+                    if (!o1ascii && o2ascii) {
+                        return 1;
+                    } else if (o1ascii && !o2ascii) {
+                        return -1;
+                    }
+
+                    return o1.compareTo(o2);
+                });
+
+                // Sort locale currencies on top
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                    LocaleList locales = getApplicationContext().getResources().getConfiguration().getLocales();
+
+                    for (int i = locales.size() - 1; i > 0; i--) {
+                        Locale locale = locales.get(i);
+                        String currencySymbol = Currency.getInstance(locale).getSymbol();
+                        currencyList.remove(currencySymbol);
+                        currencyList.add(0, currencySymbol);
+                    }
+                } else {
+                    String currencySymbol = Currency.getInstance(getApplicationContext().getResources().getConfiguration().locale).getSymbol();
+                    currencyList.remove(currencySymbol);
+                    currencyList.add(0, currencySymbol);
+                }
+
+                currencyList.add(0, getString(R.string.points));
+                ArrayAdapter<String> currencyAdapter = new ArrayAdapter<>(LoyaltyCardEditActivity.this, android.R.layout.select_dialog_item, currencyList);
+                balanceCurrencyField.setAdapter(currencyAdapter);
+            }
+        });
+
+        cardIdFieldView.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                String formatString = barcodeTypeField.getText().toString();
+
+                if (!formatString.isEmpty()) {
+                    if (formatString.equals(getString(R.string.noBarcode))) {
+                        hideBarcode();
+                    } else {
+                        generateBarcode(s.toString(), BarcodeFormat.valueOf(formatString));
+                    }
+                }
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) { }
+        });
+
+        barcodeTypeField.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                hasChanged = true;
+
+                if (!s.toString().isEmpty()) {
+                    if (s.toString().equals(getString(R.string.noBarcode))) {
+                        hideBarcode();
+                    } else {
+                        generateBarcode(cardIdFieldView.getText().toString(), BarcodeFormat.valueOf(s.toString()));
+                    }
+                }
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) { }
+        });
+
+        tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            @edu.umd.cs.findbugs.annotations.SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
+            public void onTabSelected(TabLayout.Tab tab) {
+                showPart(tab.getText().toString());
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+
+            }
+
+            @Override
+            @edu.umd.cs.findbugs.annotations.SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
+            public void onTabReselected(TabLayout.Tab tab) {
+                showPart(tab.getText().toString());
+            }
+        });
+
+        tabs.selectTab(tabs.getTabAt(0));
+    }
+
+    @Override
+    public void onNewIntent(Intent intent)
+    {
+        super.onNewIntent(intent);
+
+        Log.i(TAG, "Received new intent");
+        extractIntentFields(intent);
+
+        // Reset these fields, so they are re-populated in onResume().
+        storeFieldEdit.setText("");
+        noteFieldEdit.setText("");
+        expiryField.setTag(null);
+        expiryField.setText("");
+        balanceField.setTag(null);
+        balanceField.setText("");
+        balanceCurrencyField.setTag(null);
+        balanceCurrencyField.setText("");
+        cardIdFieldView.setText("");
+        barcodeTypeField.setText("");
+    }
+
+    @SuppressLint("DefaultLocale")
+    @Override
+    public void onResume()
+    {
+        super.onResume();
+
+        Log.i(TAG, "To view card: " + loyaltyCardId);
+
+        if(updateLoyaltyCard)
+        {
+            final LoyaltyCard loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
+            if(loyaltyCard == null)
+            {
+                Log.w(TAG, "Could not lookup loyalty card " + loyaltyCardId);
+                Toast.makeText(this, R.string.noCardExistsError, Toast.LENGTH_LONG).show();
+                finish();
+                return;
+            }
+
+            if(storeFieldEdit.getText().length() == 0)
+            {
+                storeFieldEdit.setText(loyaltyCard.store);
+            }
+
+            if(noteFieldEdit.getText().length() == 0)
+            {
+                noteFieldEdit.setText(loyaltyCard.note);
+            }
+
+            if(expiryField.getText().length() == 0)
+            {
+                expiryField.setTag(loyaltyCard.expiry);
+                formatExpiryField(loyaltyCard.expiry);
+            }
+
+            if(balanceField.getText().length() == 0)
+            {
+                balanceField.setTag(loyaltyCard.balance);
+                balanceField.setText(Utils.formatBalanceWithoutCurrencySymbol(loyaltyCard.balance, loyaltyCard.balanceType));
+            }
+
+            if(balanceCurrencyField.getText().length() == 0)
+            {
+                balanceCurrencyField.setTag(loyaltyCard.balanceType);
+                formatBalanceCurrencyField(loyaltyCard.balanceType);
+            }
+
+            if(cardIdFieldView.getText().length() == 0)
+            {
+                cardIdFieldView.setText(loyaltyCard.cardId);
+            }
+
+            if(barcodeTypeField.getText().length() == 0)
+            {
+                barcodeTypeField.setText(loyaltyCard.barcodeType.isEmpty() ? getString(R.string.noBarcode) : loyaltyCard.barcodeType);
+            }
+
+            if(headingColorValue == null)
+            {
+                headingColorValue = loyaltyCard.headerColor;
+                if(headingColorValue == null)
+                {
+                    headingColorValue = LetterBitmap.getDefaultColor(this, loyaltyCard.store);
+                }
+            }
+
+            setTitle(R.string.editCardTitle);
+        }
+        else if(importLoyaltyCardUri != null)
+        {
+            // Try to parse
+            LoyaltyCard importCard;
+            try {
+                importCard = importUriHelper.parse(importLoyaltyCardUri);
+            } catch (InvalidObjectException ex) {
+                Toast.makeText(this, R.string.failedParsingImportUriError, Toast.LENGTH_LONG).show();
+                finish();
+                return;
+            }
+
+            storeFieldEdit.setText(importCard.store);
+            noteFieldEdit.setText(importCard.note);
+            expiryField.setTag(importCard.expiry);
+            formatExpiryField(importCard.expiry);
+            balanceField.setTag(importCard.balance);
+            balanceCurrencyField.setTag(importCard.balanceType);
+            formatBalanceCurrencyField(importCard.balanceType);
+            cardIdFieldView.setText(importCard.cardId);
+            barcodeTypeField.setText(importCard.barcodeType);
+            headingColorValue = importCard.headerColor;
+        }
+        else
+        {
+            setTitle(R.string.addCardTitle);
+            expiryField.setTag(null);
+            expiryField.setText(getString(R.string.never));
+            balanceField.setTag(new BigDecimal("0"));
+            balanceCurrencyField.setTag(null);
+            formatBalanceCurrencyField(null);
+            hideBarcode();
+        }
+
+        if(groupsChips.getChildCount() == 0)
+        {
+            List<Group> existingGroups = db.getGroups();
+
+            List<Group> loyaltyCardGroups = db.getLoyaltyCardGroups(loyaltyCardId);
+
+            if (existingGroups.isEmpty()) {
+                groupsChips.setVisibility(View.GONE);
+            } else {
+                groupsChips.setVisibility(View.VISIBLE);
+            }
+
+            for (Group group : db.getGroups()) {
+                Chip chip = (Chip) getLayoutInflater().inflate(R.layout.layout_chip_choice, groupsChips, false);
+                chip.setText(group._id);
+                chip.setTag(group);
+
+                chip.setChecked(false);
+                for (Group loyaltyCardGroup : loyaltyCardGroups) {
+                    if (loyaltyCardGroup._id.equals(group._id)) {
+                        chip.setChecked(true);
+                        break;
+                    }
+                }
+                chip.setOnTouchListener((v, event) -> {
+                    hasChanged = true;
+
+                    return false;
+                });
+
+                groupsChips.addView(chip);
+            }
+        }
+
+        if(headingColorValue == null)
+        {
+            // Select a random color to start out with.
+            TypedArray colors = getResources().obtainTypedArray(R.array.letter_tile_colors);
+            final int color = (int)(Math.random() * colors.length());
+            headingColorValue = colors.getColor(color, Color.BLACK);
+            colors.recycle();
+        }
+
+        thumbnail.setOnClickListener(new ColorSelectListener(headingColorValue));
+
+        if (!initDone) {
+            hasChanged = false;
+            initDone = true;
+        }
+
+        // Update from intent
+        if (barcodeType != null) {
+            barcodeTypeField.setText(barcodeType.isEmpty() ? getString(R.string.noBarcode) : barcodeType);
+            barcodeType = null;
+        }
+        if (cardId != null) {
+            cardIdFieldView.setText(cardId);
+            cardId = null;
+        }
+
+        if(cardIdFieldView.getText().length() > 0 && barcodeTypeField.getText().length() > 0)
+        {
+            String formatString = barcodeTypeField.getText().toString();
+
+            if(formatString.isEmpty() || formatString.equals(getString(R.string.noBarcode)))
+            {
+                hideBarcode();
+            }
+            else
+            {
+                final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
+                final String cardIdString = cardIdFieldView.getText().toString();
+
+                generateBarcode(cardIdString, format);
+            }
+        }
+
+        enterButton.setOnClickListener(new EditCardIdAndBarcode());
+        barcodeImage.setOnClickListener(new EditCardIdAndBarcode());
+
+        ArrayList<String> barcodeList = new ArrayList<>(BarcodeSelectorActivity.SUPPORTED_BARCODE_TYPES);
+        barcodeList.add(0, getString(R.string.noBarcode));
+        ArrayAdapter<String> barcodeAdapter = new ArrayAdapter<>(this, android.R.layout.select_dialog_item, barcodeList);
+        barcodeTypeField.setAdapter(barcodeAdapter);
+
+        FloatingActionButton saveButton = findViewById(R.id.fabSave);
+        saveButton.setOnClickListener(v -> doSave());
+
+        generateIcon(storeFieldEdit.getText().toString());
+    }
+
+    private void formatExpiryField(Date expiry) {
+        if (expiry == null) {
+            expiryField.setText(getString(R.string.never));
+        } else {
+            expiryField.setText(DateFormat.getDateInstance(DateFormat.LONG).format(expiry));
+        }
+    }
+
+    private void formatBalanceCurrencyField(Currency balanceType) {
+        if (balanceType == null) {
+            balanceCurrencyField.setText(getString(R.string.points));
+        } else {
+            balanceCurrencyField.setText(balanceType.getSymbol());
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        askBeforeQuitIfChanged();
+    }
+
+    private void askBeforeQuitIfChanged() {
+        if (!hasChanged) {
+            finish();
+            return;
+        }
+
+        if (confirmExitDialog == null) {
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            builder.setTitle(R.string.leaveWithoutSaveTitle);
+            builder.setMessage(R.string.leaveWithoutSaveConfirmation);
+            builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    finish();
+                    dialog.dismiss();
+                }
+            });
+            builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    dialog.dismiss();
+                }
+            });
+            confirmExitDialog = builder.create();
+        }
+        confirmExitDialog.show();
+    }
+
+    class EditCardIdAndBarcode implements View.OnClickListener
+    {
+        @Override
+        public void onClick(View v)
+        {
+
+            Intent i = new Intent(getApplicationContext(), ScanActivity.class);
+            final Bundle b = new Bundle();
+            b.putString("cardId", cardIdFieldView.getText().toString());
+            i.putExtras(b);
+            startActivityForResult(i, Utils.BARCODE_SCAN);
+        }
+    }
+
+    class ColorSelectListener implements View.OnClickListener
+    {
+        final int defaultColor;
+
+        ColorSelectListener(int defaultColor)
+        {
+            this.defaultColor = defaultColor;
+        }
+
+        @Override
+        public void onClick(View v)
+        {
+            ColorPickerDialog dialog = ColorPickerDialog.newBuilder().setColor(defaultColor).create();
+            dialog.setColorPickerDialogListener(new ColorPickerDialogListener()
+            {
+                @Override
+                public void onColorSelected(int dialogId, int color)
+                {
+                    hasChanged = true;
+
+                    headingColorValue = color;
+
+                    generateIcon(storeFieldEdit.getText().toString());
+                }
+
+                @Override
+                public void onDialogDismissed(int dialogId)
+                {
+                    // Nothing to do, no change made
+                }
+            });
+            dialog.show(getSupportFragmentManager(), "color-picker-dialog");
+        }
+    }
+
+    public static class DatePickerFragment extends DialogFragment
+            implements DatePickerDialog.OnDateSetListener {
+
+        final EditText expiryFieldEdit;
+
+        DatePickerFragment(EditText expiryFieldEdit) {
+            this.expiryFieldEdit = expiryFieldEdit;
+        }
+
+        @Override
+        public Dialog onCreateDialog(Bundle savedInstanceState) {
+            // Use the current date as the default date in the picker
+            final Calendar c = Calendar.getInstance();
+
+            Date date = (Date) expiryFieldEdit.getTag();
+            if (date != null) {
+                c.setTime(date);
+            }
+
+            int year = c.get(Calendar.YEAR);
+            int month = c.get(Calendar.MONTH);
+            int day = c.get(Calendar.DAY_OF_MONTH);
+
+            // Create a new instance of DatePickerDialog and return it
+            return new DatePickerDialog(getActivity(), this, year, month, day);
+        }
+
+        public void onDateSet(DatePicker view, int year, int month, int day) {
+            Calendar c = Calendar.getInstance();
+            c.set(Calendar.YEAR, year);
+            c.set(Calendar.MONTH, month);
+            c.set(Calendar.DAY_OF_MONTH, day);
+            c.set(Calendar.HOUR, 0);
+            c.set(Calendar.MINUTE, 0);
+            c.set(Calendar.SECOND, 0);
+            c.set(Calendar.MILLISECOND, 0);
+
+            long unixTime = c.getTimeInMillis();
+
+            Date date = new Date(unixTime);
+
+            expiryFieldEdit.setTag(date);
+            expiryFieldEdit.setText(DateFormat.getDateInstance(DateFormat.LONG).format(date));
+        }
+    }
+
+    private void doSave()
+    {
+        String store = storeFieldEdit.getText().toString();
+        String note = noteFieldEdit.getText().toString();
+        Date expiry = (Date) expiryField.getTag();
+        BigDecimal balance = (BigDecimal) balanceField.getTag();
+        Currency balanceType = balanceCurrencyField.getTag() != null ? ((Currency) balanceCurrencyField.getTag()) : null;
+        String cardId = cardIdFieldView.getText().toString();
+        String barcodeType = barcodeTypeField.getText().toString();
+
+        // We do not want to save the no barcode string to the database
+        // it is simply an empty there for no barcode
+        if(barcodeType.equals(getString(R.string.noBarcode)))
+        {
+            barcodeType = "";
+        }
+
+        if(store.isEmpty())
+        {
+            Snackbar.make(storeFieldEdit, R.string.noStoreError, Snackbar.LENGTH_LONG).show();
+            return;
+        }
+
+        if(cardId.isEmpty())
+        {
+            Snackbar.make(cardIdFieldView, R.string.noCardIdError, Snackbar.LENGTH_LONG).show();
+            return;
+        }
+
+        if(!validBalance)
+        {
+            Snackbar.make(balanceField, getString(R.string.parsingBalanceFailed, balanceField.getText().toString()), Snackbar.LENGTH_LONG).show();
+            return;
+        }
+
+        List<Group> selectedGroups = new ArrayList<>();
+
+        for (Integer chipId : groupsChips.getCheckedChipIds()) {
+            Chip chip = groupsChips.findViewById(chipId);
+            selectedGroups.add((Group) chip.getTag());
+        }
+
+        if(updateLoyaltyCard)
+        {   //update of "starStatus" not necessary, since it cannot be changed in this activity (only in ViewActivity)
+            db.updateLoyaltyCard(loyaltyCardId, store, note, expiry, balance, balanceType, cardId, barcodeType, headingColorValue);
+            Log.i(TAG, "Updated " + loyaltyCardId + " to " + cardId);
+        }
+        else
+        {
+            loyaltyCardId = (int)db.insertLoyaltyCard(store, note, expiry, balance, balanceType, cardId, barcodeType, headingColorValue, 0);
+        }
+
+        db.setLoyaltyCardGroups(loyaltyCardId, selectedGroups);
+
+        finish();
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu)
+    {
+        if(updateLoyaltyCard)
+        {
+            getMenuInflater().inflate(R.menu.card_update_menu, menu);
+        }
+        else
+        {
+            getMenuInflater().inflate(R.menu.card_add_menu, menu);
+        }
+
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item)
+    {
+        int id = item.getItemId();
+
+        switch(id)
+        {
+            case android.R.id.home:
+                askBeforeQuitIfChanged();
+                break;
+
+            case R.id.action_delete:
+                AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                builder.setTitle(R.string.deleteTitle);
+                builder.setMessage(R.string.deleteConfirmation);
+                builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener()
+                {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which)
+                    {
+                        Log.e(TAG, "Deleting card: " + loyaltyCardId);
+
+                        DBHelper db = new DBHelper(LoyaltyCardEditActivity.this);
+                        db.deleteLoyaltyCard(loyaltyCardId);
+
+                        ShortcutHelper.removeShortcut(LoyaltyCardEditActivity.this, loyaltyCardId);
+
+                        finish();
+                        dialog.dismiss();
+                    }
+                });
+                builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener()
+                {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which)
+                    {
+                        dialog.dismiss();
+                    }
+                });
+                AlertDialog dialog = builder.create();
+                dialog.show();
+
+                return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent intent)
+    {
+        super.onActivityResult(requestCode, resultCode, intent);
+
+        BarcodeValues barcodeValues = Utils.parseSetBarcodeActivityResult(requestCode, resultCode, intent);
+
+        barcodeType = barcodeValues.format();
+        cardId = barcodeValues.content();
+
+        onResume();
+    }
+
+    private void showBarcode() {
+        barcodeImageLayout.setVisibility(View.VISIBLE);
+    }
+
+    private void hideBarcode() {
+        barcodeImageLayout.setVisibility(View.GONE);
+    }
+
+    private void generateBarcode(final String cardId, final BarcodeFormat barcodeFormat) {
+        if (barcodeImage.getHeight() == 0) {
+            Log.d(TAG, "ImageView size is not known known at start, waiting for load");
+            // The size of the ImageView is not yet available as it has not
+            // yet been drawn. Wait for it to be drawn so the size is available.
+            barcodeImage.getViewTreeObserver().addOnGlobalLayoutListener(
+                    new ViewTreeObserver.OnGlobalLayoutListener() {
+                        @Override
+                        public void onGlobalLayout() {
+                            barcodeImage.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+
+                            Log.d(TAG, "ImageView size now known");
+                            new BarcodeImageWriterTask(barcodeImage, cardId, barcodeFormat).execute();
+                        }
+                    });
+        } else {
+            Log.d(TAG, "ImageView size known known, creating barcode");
+            new BarcodeImageWriterTask(barcodeImage, cardId, barcodeFormat).execute();
+        }
+
+        showBarcode();
+    }
+
+    private void generateIcon(String store) {
+        if (headingColorValue == null) {
+            return;
+        }
+
+        thumbnail.setBackgroundColor(headingColorValue);
+
+        LetterBitmap letterBitmap = Utils.generateIcon(this, store, headingColorValue);
+
+        if (letterBitmap != null) {
+            thumbnail.setImageBitmap(letterBitmap.getLetterTile());
+        } else {
+            thumbnail.setImageBitmap(null);
+        }
+
+        thumbnail.setMinimumWidth(thumbnail.getHeight());
+    }
+
+    private void showPart(String part) {
+        View cardPart = findViewById(R.id.cardPart);
+        View barcodePart = findViewById(R.id.barcodePart);
+
+        if (getString(R.string.card).equals(part)) {
+            cardPart.setVisibility(View.VISIBLE);
+            barcodePart.setVisibility(View.GONE);
+
+            // Explicitly hide barcode (fixes blurriness on redraw)
+            hideBarcode();
+        } else if (getString(R.string.barcode).equals(part)) {
+            cardPart.setVisibility(View.GONE);
+            barcodePart.setVisibility(View.VISIBLE);
+
+            // Redraw barcode due to size change (Visibility.GONE sets it to 0)
+            String formatString = barcodeTypeField.getText().toString();
+            if (formatString.isEmpty() || formatString.equals(getString(R.string.noBarcode))) {
+                hideBarcode();
+            } else {
+                generateBarcode(cardIdFieldView.getText().toString(), BarcodeFormat.valueOf(formatString));
+            }
+        } else {
+            throw new UnsupportedOperationException();
+        }
+    }
+}

app/src/main/java/protect/card_locker/LoyaltyCardLockerApplication.java

@@ -0,0 +1,15 @@
+package protect.card_locker;
+
+import android.app.Application;
+import androidx.appcompat.app.AppCompatDelegate;
+
+import protect.card_locker.preferences.Settings;
+
+public class LoyaltyCardLockerApplication extends Application {
+    public void onCreate() {
+        super.onCreate();
+
+        Settings settings = new Settings(getApplicationContext());
+        AppCompatDelegate.setDefaultNightMode(settings.getTheme());
+    }
+}

app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java

@@ -1,77 +1,109 @@
 package protect.card_locker;
 
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.res.Configuration;
+import android.graphics.Color;
+import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.design.widget.Snackbar;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+
+import androidx.annotation.NonNull;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.constraintlayout.widget.Guideline;
+import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.core.widget.TextViewCompat;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.content.res.AppCompatResources;
+import androidx.appcompat.widget.Toolbar;
+
+import android.util.DisplayMetrics;
 import android.util.Log;
+import android.util.TypedValue;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.Window;
 import android.view.WindowManager;
-import android.widget.Button;
-import android.widget.CheckBox;
-import android.widget.EditText;
+import android.widget.ImageButton;
 import android.widget.ImageView;
+import android.widget.SeekBar;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.google.android.material.appbar.AppBarLayout;
+import com.google.android.material.bottomsheet.BottomSheetBehavior;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.zxing.BarcodeFormat;
-import com.google.zxing.integration.android.IntentIntegrator;
-import com.google.zxing.integration.android.IntentResult;
 
+import java.math.BigDecimal;
+import java.text.DateFormat;
+import java.util.List;
+
+import protect.card_locker.preferences.Settings;
 
 public class LoyaltyCardViewActivity extends AppCompatActivity
 {
-    private static final String TAG = "CardLocker";
+    private static final String TAG = "Catima";
 
-    private static final int SELECT_BARCODE_REQUEST = 1;
-
-    EditText storeFieldEdit;
-    TextView storeFieldView;
-    EditText noteFieldEdit;
-    TextView noteFieldView;
     TextView cardIdFieldView;
-    View cardIdDivider;
-    View cardIdTableRow;
-    TextView barcodeTypeField;
+    BottomSheetBehavior behavior;
+    View bottomSheet;
+    ImageView bottomSheetButton;
+    TextView noteView;
+    TextView groupsView;
+    TextView balanceView;
+    TextView expiryView;
+    TextView storeName;
+    ImageButton maximizeButton;
     ImageView barcodeImage;
-    View barcodeImageLayout;
-    View barcodeCaptureLayout;
-
-    Button captureButton;
-    Button enterButton;
-
+    ImageButton minimizeButton;
+    View collapsingToolbarLayout;
+    AppBarLayout appBarLayout;
     int loyaltyCardId;
-    boolean updateLoyaltyCard;
-    boolean viewLoyaltyCard;
-
+    LoyaltyCard loyaltyCard;
     boolean rotationEnabled;
-
     DBHelper db;
+    ImportURIHelper importURIHelper;
+    Settings settings;
+
+    String cardIdString;
+    BarcodeFormat format;
+
+    FloatingActionButton editButton;
+
+    Guideline centerGuideline;
+    SeekBar barcodeScaler;
+
+    boolean starred;
+    boolean backgroundNeedsDarkIcons;
+    boolean barcodeIsFullscreen = false;
 
     private void extractIntentFields(Intent intent)
     {
         final Bundle b = intent.getExtras();
         loyaltyCardId = b != null ? b.getInt("id") : 0;
-        updateLoyaltyCard = b != null && b.getBoolean("update", false);
-        viewLoyaltyCard = b != null && b.getBoolean("view", false);
+        Log.d(TAG, "View activity: id=" + loyaltyCardId);
+    }
 
-        Log.d(TAG, "View activity: id=" + loyaltyCardId
-                + ", updateLoyaltyCard=" + Boolean.toString(updateLoyaltyCard)
-                + ", viewLoyaltyCard=" + Boolean.toString(viewLoyaltyCard));
+    private Drawable getIcon(int icon, boolean dark)
+    {
+        Drawable unwrappedIcon = AppCompatResources.getDrawable(this, icon);
+        assert unwrappedIcon != null;
+        Drawable wrappedIcon = DrawableCompat.wrap(unwrappedIcon);
+        if(dark)
+        {
+            DrawableCompat.setTint(wrappedIcon, Color.BLACK);
+        }
+        else
+        {
+            DrawableCompat.setTintList(wrappedIcon, null);
+        }
+
+        return wrappedIcon;
     }
 
     @Override
@@ -79,46 +111,118 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
     {
         super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.loyalty_card_view_activity);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
-        ActionBar actionBar = getSupportActionBar();
-        if(actionBar != null)
-        {
-            actionBar.setDisplayHomeAsUpEnabled(true);
-        }
+        settings = new Settings(this);
 
         extractIntentFields(getIntent());
 
+        setContentView(R.layout.loyalty_card_view_layout);
+
         db = new DBHelper(this);
+        importURIHelper = new ImportURIHelper(this);
 
-        storeFieldEdit = (EditText) findViewById(R.id.storeNameEdit);
-        storeFieldView = (TextView) findViewById(R.id.storeNameView);
-        noteFieldEdit = (EditText) findViewById(R.id.noteEdit);
-        noteFieldView = (TextView) findViewById(R.id.noteView);
-        cardIdFieldView = (TextView) findViewById(R.id.cardIdView);
-        cardIdDivider = findViewById(R.id.cardIdDivider);
-        cardIdTableRow = findViewById(R.id.cardIdTableRow);
-        barcodeTypeField = (TextView) findViewById(R.id.barcodeType);
-        barcodeImage = (ImageView) findViewById(R.id.barcode);
-        barcodeImageLayout = findViewById(R.id.barcodeLayout);
-        barcodeCaptureLayout = findViewById(R.id.barcodeCaptureLayout);
+        cardIdFieldView = findViewById(R.id.cardIdView);
+        bottomSheet = findViewById(R.id.bottom_sheet);
+        bottomSheetButton = findViewById(R.id.bottomSheetButton);
+        noteView = findViewById(R.id.noteView);
+        groupsView = findViewById(R.id.groupsView);
+        balanceView = findViewById(R.id.balanceView);
+        expiryView = findViewById(R.id.expiryView);
+        storeName = findViewById(R.id.storeName);
+        maximizeButton = findViewById(R.id.maximizeButton);
+        barcodeImage = findViewById(R.id.barcode);
+        minimizeButton = findViewById(R.id.minimizeButton);
+        collapsingToolbarLayout = findViewById(R.id.collapsingToolbarLayout);
+        appBarLayout = findViewById(R.id.app_bar_layout);
 
-        captureButton = (Button) findViewById(R.id.captureButton);
-        enterButton = (Button) findViewById(R.id.enterButton);
+        centerGuideline = findViewById(R.id.centerGuideline);
+        centerGuideline.setGuidelinePercent(0.5f);
+        barcodeScaler = findViewById(R.id.barcodeScaler);
+        barcodeScaler.setProgress(100);
+        barcodeScaler.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+            @Override
+            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+                Log.d(TAG, "Progress is " + progress);
+                Log.d(TAG, "Max is " + barcodeScaler.getMax());
+                float scale = (float) progress / (float) barcodeScaler.getMax();
+                Log.d(TAG, "Scaling to " + scale);
+
+                redrawBarcodeAfterResize();
+                centerGuideline.setGuidelinePercent(0.5f * scale);
+            }
+
+            @Override
+            public void onStartTrackingTouch(SeekBar seekBar) {
+
+            }
+
+            @Override
+            public void onStopTrackingTouch(SeekBar seekBar) {
+
+            }
+        });
+
+        rotationEnabled = true;
+
+        // Allow making barcode fullscreen on tap
+        maximizeButton.setOnClickListener(v -> setFullscreen(true));
+        barcodeImage.setOnClickListener(view -> {
+            if (barcodeIsFullscreen)
+            {
+                setFullscreen(false);
+            }
+            else
+            {
+                setFullscreen(true);
+            }
+        });
+        minimizeButton.setOnClickListener(v -> setFullscreen(false));
+
+        editButton = findViewById(R.id.fabEdit);
+        editButton.setOnClickListener(v -> {
+            Intent intent = new Intent(getApplicationContext(), LoyaltyCardEditActivity.class);
+            Bundle bundle = new Bundle();
+            bundle.putInt("id", loyaltyCardId);
+            bundle.putBoolean("update", true);
+            intent.putExtras(bundle);
+            startActivity(intent);
+            finish();
+        });
+
+        behavior = BottomSheetBehavior.from(bottomSheet);
+        behavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
+            @Override
+            public void onStateChanged(@NonNull View bottomSheet, int newState) {
+                if (newState == BottomSheetBehavior.STATE_DRAGGING) {
+                    editButton.hide();
+                } else if (newState == BottomSheetBehavior.STATE_EXPANDED) {
+                    bottomSheetButton.setImageResource(R.drawable.ic_baseline_arrow_drop_down_24);
+                    editButton.hide();
+                } else if (newState == BottomSheetBehavior.STATE_COLLAPSED) {
+                    bottomSheetButton.setImageResource(R.drawable.ic_baseline_arrow_drop_up_24);
+                    editButton.show();
+                }
+            }
+
+            @Override
+            public void onSlide(@NonNull View bottomSheet, float slideOffset) { }
+        });
+
+        bottomSheetButton.setOnClickListener(v -> {
+            if (behavior.getState() == BottomSheetBehavior.STATE_EXPANDED) {
+                behavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
+            } else {
+                behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
+            }
+        });
     }
 
     @Override
     public void onNewIntent(Intent intent)
     {
+        super.onNewIntent(intent);
+
         Log.i(TAG, "Received new intent");
         extractIntentFields(intent);
-
-        // Reset these fields, so they are re-populated in onResume().
-        storeFieldEdit.setText("");
-        noteFieldEdit.setText("");
-        cardIdFieldView.setText("");
-        barcodeTypeField.setText("");
     }
 
     @Override
@@ -128,108 +232,154 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
 
         Log.i(TAG, "To view card: " + loyaltyCardId);
 
-        if(viewLoyaltyCard)
+        // The brightness value is on a scale from [0, ..., 1], where
+        // '1' is the brightest. We attempt to maximize the brightness
+        // to help barcode readers scan the barcode.
+        Window window = getWindow();
+        if(window != null && settings.useMaxBrightnessDisplayingBarcode())
         {
-            // The brightness value is on a scale from [0, ..., 1], where
-            // '1' is the brightest. We attempt to maximize the brightness
-            // to help barcode readers scan the barcode.
-            Window window = getWindow();
-            if(window != null)
-            {
-                WindowManager.LayoutParams attributes = window.getAttributes();
-                attributes.screenBrightness = 1F;
-                window.setAttributes(attributes);
-            }
+            WindowManager.LayoutParams attributes = window.getAttributes();
+            attributes.screenBrightness = 1F;
+            window.setAttributes(attributes);
         }
 
-        if(updateLoyaltyCard || viewLoyaltyCard)
+        loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
+        if(loyaltyCard == null)
         {
-            final LoyaltyCard loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
-            if(loyaltyCard == null)
-            {
-                Log.w(TAG, "Could not lookup loyalty card " + loyaltyCardId);
-                Toast.makeText(this, R.string.noCardExistsError, Toast.LENGTH_LONG).show();
-                finish();
-                return;
-            }
+            Log.w(TAG, "Could not lookup loyalty card " + loyaltyCardId);
+            Toast.makeText(this, R.string.noCardExistsError, Toast.LENGTH_LONG).show();
+            finish();
+            return;
+        }
 
-            if(storeFieldEdit.getText().length() == 0)
-            {
-                storeFieldEdit.setText(loyaltyCard.store);
-                storeFieldView.setText(loyaltyCard.store);
-            }
+        setupOrientation();
 
-            if(noteFieldEdit.getText().length() == 0)
-            {
-                noteFieldEdit.setText(loyaltyCard.note);
-                noteFieldView.setText(loyaltyCard.note);
-            }
+        String formatString = loyaltyCard.barcodeType;
+        format = !formatString.isEmpty() ? BarcodeFormat.valueOf(formatString) : null;
+        cardIdString = loyaltyCard.cardId;
 
-            if(cardIdFieldView.getText().length() == 0)
-            {
-                cardIdFieldView.setText(loyaltyCard.cardId);
-            }
+        cardIdFieldView.setText(loyaltyCard.cardId);
+        TextViewCompat.setAutoSizeTextTypeUniformWithConfiguration(cardIdFieldView,
+                getResources().getInteger(R.integer.settings_card_id_min_font_size_sp)-1, settings.getCardIdFontSize(),
+                1, TypedValue.COMPLEX_UNIT_SP);
 
-            if(barcodeTypeField.getText().length() == 0)
-            {
-                barcodeTypeField.setText(loyaltyCard.barcodeType);
-            }
-
-            if(updateLoyaltyCard)
-            {
-                setTitle(R.string.editCardTitle);
-
-                storeFieldView.setVisibility(View.GONE);
-                noteFieldView.setVisibility(View.GONE);
-            }
-            else
-            {
-                barcodeCaptureLayout.setVisibility(View.GONE);
-                captureButton.setVisibility(View.GONE);
-                setTitle(R.string.viewCardTitle);
-
-                storeFieldEdit.setVisibility(View.GONE);
-                noteFieldEdit.setVisibility(View.GONE);
-            }
+        if(loyaltyCard.note.length() > 0)
+        {
+            noteView.setVisibility(View.VISIBLE);
+            noteView.setText(loyaltyCard.note);
         }
         else
         {
-            setTitle(R.string.addCardTitle);
-
-            storeFieldView.setVisibility(View.GONE);
-            noteFieldView.setVisibility(View.GONE);
+            noteView.setVisibility(View.GONE);
         }
 
-        if(cardIdFieldView.getText().length() > 0 && barcodeTypeField.getText().length() > 0)
-        {
-            String formatString = barcodeTypeField.getText().toString();
-            final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
-            final String cardIdString = cardIdFieldView.getText().toString();
+        List<Group> loyaltyCardGroups = db.getLoyaltyCardGroups(loyaltyCardId);
 
+        if(loyaltyCardGroups.size() > 0) {
+            StringBuilder groupsString = new StringBuilder();
+            for (Group group : loyaltyCardGroups) {
+                groupsString.append(group._id);
+                groupsString.append(" ");
+            }
+
+            groupsView.setVisibility(View.VISIBLE);
+            groupsView.setText(getString(R.string.groupsList, groupsString.toString()));
+        }
+        else
+        {
+            groupsView.setVisibility(View.GONE);
+        }
+
+        if(!loyaltyCard.balance.equals(new BigDecimal(0))) {
+            balanceView.setVisibility(View.VISIBLE);
+            balanceView.setText(getString(R.string.balanceSentence, Utils.formatBalance(this, loyaltyCard.balance, loyaltyCard.balanceType)));
+        }
+        else
+        {
+            balanceView.setVisibility(View.GONE);
+        }
+
+        if(loyaltyCard.expiry != null) {
+            expiryView.setVisibility(View.VISIBLE);
+
+            int expiryString = R.string.expiryStateSentence;
+            if(Utils.hasExpired(loyaltyCard.expiry)) {
+                expiryString = R.string.expiryStateSentenceExpired;
+                expiryView.setTextColor(getResources().getColor(R.color.alert));
+            }
+            expiryView.setText(getString(expiryString, DateFormat.getDateInstance(DateFormat.LONG).format(loyaltyCard.expiry)));
+        }
+        else
+        {
+            expiryView.setVisibility(View.GONE);
+        }
+        expiryView.setTag(loyaltyCard.expiry);
+
+        if (!barcodeIsFullscreen) {
+            makeBottomSheetVisibleIfUseful();
+        }
+
+        storeName.setText(loyaltyCard.store);
+        storeName.setTextSize(settings.getCardTitleFontSize());
+
+        int backgroundHeaderColor;
+        if(loyaltyCard.headerColor != null)
+        {
+            backgroundHeaderColor = loyaltyCard.headerColor;
+        }
+        else
+        {
+            backgroundHeaderColor = LetterBitmap.getDefaultColor(this, loyaltyCard.store);
+        }
+
+        collapsingToolbarLayout.setBackgroundColor(backgroundHeaderColor);
+        appBarLayout.setBackgroundColor(backgroundHeaderColor);
+
+        int textColor;
+        if(Utils.needsDarkForeground(backgroundHeaderColor))
+        {
+            textColor = Color.BLACK;
+        }
+        else
+        {
+            textColor = Color.WHITE;
+        }
+        storeName.setTextColor(textColor);
+        ((Toolbar) findViewById(R.id.toolbar_landscape)).setTitleTextColor(textColor);
+
+        // If the background is very bright, we should use dark icons
+        backgroundNeedsDarkIcons = Utils.needsDarkForeground(backgroundHeaderColor);
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setHomeAsUpIndicator(getIcon(R.drawable.ic_arrow_back_white, backgroundNeedsDarkIcons));
+        }
+
+        // Make notification area light if dark icons are needed
+        if(Build.VERSION.SDK_INT >= 23)
+        {
+            window.getDecorView().setSystemUiVisibility(backgroundNeedsDarkIcons ? View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR : 0);
+        }
+        if(Build.VERSION.SDK_INT >= 21)
+        {
+            window.setStatusBarColor(Color.TRANSPARENT);
+        }
+
+        // Set shadow colour of store text so even same color on same color would be readable
+        storeName.setShadowLayer(1, 1, 1, backgroundNeedsDarkIcons ? Color.BLACK : Color.WHITE);
+
+        if(format != null)
+        {
+            if (!barcodeIsFullscreen) {
+                maximizeButton.setVisibility(View.VISIBLE);
+            }
+            barcodeImage.setVisibility(View.VISIBLE);
             if(barcodeImage.getHeight() == 0)
             {
                 Log.d(TAG, "ImageView size is not known known at start, waiting for load");
                 // The size of the ImageView is not yet available as it has not
                 // yet been drawn. Wait for it to be drawn so the size is available.
-                barcodeImage.getViewTreeObserver().addOnGlobalLayoutListener(
-                    new ViewTreeObserver.OnGlobalLayoutListener()
-                    {
-                        @Override
-                        public void onGlobalLayout()
-                        {
-                            if (Build.VERSION.SDK_INT < 16)
-                            {
-                                barcodeImage.getViewTreeObserver().removeGlobalOnLayoutListener(this);
-                            }
-                            else
-                            {
-                                barcodeImage.getViewTreeObserver().removeOnGlobalLayoutListener(this);
-                            }
-
-                            Log.d(TAG, "ImageView size now known");
-                            new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
-                        }
-                    });
+                redrawBarcodeAfterResize();
             }
             else
             {
@@ -237,111 +387,64 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
                 new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
             }
 
-            barcodeImageLayout.setVisibility(View.VISIBLE);
-        }
-
-        View.OnClickListener captureCallback = new View.OnClickListener()
-        {
-            @Override
-            public void onClick(View v)
-            {
-                IntentIntegrator integrator = new IntentIntegrator(LoyaltyCardViewActivity.this);
-                integrator.setDesiredBarcodeFormats(BarcodeSelectorActivity.SUPPORTED_BARCODE_TYPES);
-
-                String prompt = getResources().getString(R.string.scanCardBarcode);
-                integrator.setPrompt(prompt);
-                integrator.initiateScan();
-            }
-        };
-
-        captureButton.setOnClickListener(captureCallback);
-
-        enterButton.setOnClickListener(new View.OnClickListener()
-        {
-            @Override
-            public void onClick(View v)
-            {
-                Intent i = new Intent(getApplicationContext(), BarcodeSelectorActivity.class);
-
-                String cardId = cardIdFieldView.getText().toString();
-                if(cardId.length() > 0)
-                {
-                    final Bundle b = new Bundle();
-                    b.putString("initialCardId", cardId);
-                    i.putExtras(b);
-                }
-
-                startActivityForResult(i, SELECT_BARCODE_REQUEST);
-            }
-        });
-
-        if(cardIdFieldView.getText().length() > 0)
-        {
-            cardIdDivider.setVisibility(View.VISIBLE);
-            cardIdTableRow.setVisibility(View.VISIBLE);
-            enterButton.setText(R.string.editCard);
+            // Force redraw fullscreen state
+            setFullscreen(barcodeIsFullscreen);
         }
         else
         {
-            cardIdDivider.setVisibility(View.GONE);
-            cardIdTableRow.setVisibility(View.GONE);
-            enterButton.setText(R.string.enterCard);
+            maximizeButton.setVisibility(View.GONE);
+            barcodeImage.setVisibility(View.GONE);
         }
     }
 
-    private void doSave()
-    {
-        String store = storeFieldEdit.getText().toString();
-        String note = noteFieldEdit.getText().toString();
-        String cardId = cardIdFieldView.getText().toString();
-        String barcodeType = barcodeTypeField.getText().toString();
-
-        if(store.isEmpty())
+    @Override
+    public void onBackPressed() {
+        if (barcodeIsFullscreen)
         {
-            Snackbar.make(storeFieldEdit, R.string.noStoreError, Snackbar.LENGTH_LONG).show();
+            setFullscreen(false);
             return;
         }
 
-        if(cardId.isEmpty() || barcodeType.isEmpty())
-        {
-            Snackbar.make(cardIdFieldView, R.string.noCardIdError, Snackbar.LENGTH_LONG).show();
-            return;
-        }
-
-        if(updateLoyaltyCard)
-        {
-            db.updateLoyaltyCard(loyaltyCardId, store, note, cardId, barcodeType);
-            Log.i(TAG, "Updated " + loyaltyCardId + " to " + cardId);
-        }
-        else
-        {
-            loyaltyCardId = (int)db.insertLoyaltyCard(store, note, cardId, barcodeType);
-        }
-
-        finish();
+        super.onBackPressed();
     }
 
     @Override
     public boolean onCreateOptionsMenu(Menu menu)
     {
-        if(viewLoyaltyCard)
+        getMenuInflater().inflate(R.menu.card_view_menu, menu);
+
+        // Always calculate lockscreen icon, it may need a black color
+        boolean lockBarcodeScreenOrientation = settings.getLockBarcodeScreenOrientation();
+        MenuItem item = menu.findItem(R.id.action_lock_unlock);
+        setOrientatonLock(item, lockBarcodeScreenOrientation);
+        if(lockBarcodeScreenOrientation)
         {
-            getMenuInflater().inflate(R.menu.card_view_menu, menu);
-        }
-        else if(updateLoyaltyCard)
-        {
-            getMenuInflater().inflate(R.menu.card_update_menu, menu);
-        }
-        else
-        {
-            getMenuInflater().inflate(R.menu.card_add_menu, menu);
+            item.setVisible(false);
         }
 
-        rotationEnabled = true;
+        loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
+        starred = loyaltyCard.starStatus != 0;
+
+        menu.findItem(R.id.action_share).setIcon(getIcon(R.drawable.ic_share_white, backgroundNeedsDarkIcons));
 
         return super.onCreateOptionsMenu(menu);
     }
 
+
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+        if (starred) {
+            menu.findItem(R.id.action_star_unstar).setIcon(getIcon(R.drawable.ic_starred_white, backgroundNeedsDarkIcons));
+            menu.findItem(R.id.action_star_unstar).setTitle(R.string.unstar);
+        }
+        else {
+            menu.findItem(R.id.action_star_unstar).setIcon(getIcon(R.drawable.ic_unstarred_white, backgroundNeedsDarkIcons));
+            menu.findItem(R.id.action_star_unstar).setTitle(R.string.star);
+        }
+        return true;
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item)
     {
@@ -353,107 +456,205 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
                 finish();
                 break;
 
-            case R.id.action_delete:
-                AlertDialog.Builder builder = new AlertDialog.Builder(this);
-                builder.setTitle(R.string.deleteTitle);
-                builder.setMessage(R.string.deleteConfirmation);
-                builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener()
-                {
-                    @Override
-                    public void onClick(DialogInterface dialog, int which)
-                    {
-                        Log.e(TAG, "Deleting card: " + loyaltyCardId);
-
-                        DBHelper db = new DBHelper(LoyaltyCardViewActivity.this);
-                        db.deleteLoyaltyCard(loyaltyCardId);
-
-                        ShortcutHelper.removeShortcut(LoyaltyCardViewActivity.this, loyaltyCardId);
-
-                        finish();
-                        dialog.dismiss();
-                    }
-                });
-                builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener()
-                {
-                    @Override
-                    public void onClick(DialogInterface dialog, int which)
-                    {
-                        dialog.dismiss();
-                    }
-                });
-                AlertDialog dialog = builder.create();
-                dialog.show();
-
-                return true;
-            case R.id.action_edit:
-                Intent intent = new Intent(getApplicationContext(), LoyaltyCardViewActivity.class);
-                Bundle bundle = new Bundle();
-                bundle.putInt("id", loyaltyCardId);
-                bundle.putBoolean("update", true);
-                intent.putExtras(bundle);
-                startActivity(intent);
-                finish();
+            case R.id.action_share:
+                importURIHelper.startShareIntent(loyaltyCard);
                 return true;
 
             case R.id.action_lock_unlock:
                 if(rotationEnabled)
                 {
-                    item.setIcon(R.drawable.ic_lock_outline_white_24dp);
-                    item.setTitle(R.string.unlockScreen);
-                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
+                    setOrientatonLock(item, true);
                 }
                 else
                 {
-                    item.setIcon(R.drawable.ic_lock_open_white_24dp);
-                    item.setTitle(R.string.lockScreen);
-                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
+                    setOrientatonLock(item, false);
                 }
                 rotationEnabled = !rotationEnabled;
                 return true;
 
-            case R.id.action_save:
-                doSave();
+            case R.id.action_star_unstar:
+                starred = !starred;
+                db.updateLoyaltyCardStarStatus(loyaltyCardId, starred ? 1 : 0);
+                invalidateOptionsMenu();
                 return true;
         }
 
         return super.onOptionsItemSelected(item);
     }
 
-    @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent intent)
+    private void setupOrientation()
     {
-        String contents = null;
-        String format = null;
+        Toolbar portraitToolbar = findViewById(R.id.toolbar);
+        Toolbar landscapeToolbar = findViewById(R.id.toolbar_landscape);
 
-        IntentResult result =
-                IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
-        if (result != null)
-        {
-            Log.i(TAG, "Received barcode information from capture");
-            contents = result.getContents();
-            format = result.getFormatName();
+        int orientation = getResources().getConfiguration().orientation;
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            Log.d(TAG, "Detected landscape mode");
+
+            setTitle(loyaltyCard.store);
+
+            collapsingToolbarLayout.setVisibility(View.GONE);
+            portraitToolbar.setVisibility(View.GONE);
+            landscapeToolbar.setVisibility(View.VISIBLE);
+
+            setSupportActionBar(landscapeToolbar);
+        } else {
+            Log.d(TAG, "Detected portrait mode");
+
+            setTitle("");
+
+            collapsingToolbarLayout.setVisibility(View.VISIBLE);
+            portraitToolbar.setVisibility(View.VISIBLE);
+            landscapeToolbar.setVisibility(View.GONE);
+
+            setSupportActionBar(portraitToolbar);
         }
 
-        if(requestCode == SELECT_BARCODE_REQUEST && resultCode == Activity.RESULT_OK)
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
         {
-            Log.i(TAG, "Received barcode information from capture");
-
-            contents = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_CONTENTS);
-            format = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_FORMAT);
-        }
-
-        if(contents != null && contents.isEmpty() == false &&
-                format != null && format.isEmpty() == false)
-        {
-            Log.i(TAG, "Read barcode id: " + contents);
-            Log.i(TAG, "Read format: " + format);
-
-            TextView cardIdView = (TextView)findViewById(R.id.cardIdView);
-            cardIdView.setText(contents);
-
-            final TextView barcodeTypeField = (TextView) findViewById(R.id.barcodeType);
-            barcodeTypeField.setText(format);
-            onResume();
+            actionBar.setDisplayHomeAsUpEnabled(true);
         }
     }
-}
+    private void setOrientatonLock(MenuItem item, boolean lock)
+    {
+        if(lock)
+        {
+
+            item.setIcon(getIcon(R.drawable.ic_lock_outline_white_24dp, backgroundNeedsDarkIcons));
+            item.setTitle(R.string.unlockScreen);
+            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
+        }
+        else
+        {
+            item.setIcon(getIcon(R.drawable.ic_lock_open_white_24dp, backgroundNeedsDarkIcons));
+            item.setTitle(R.string.lockScreen);
+            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
+        }
+    }
+
+    private void makeBottomSheetVisibleIfUseful()
+    {
+        if (noteView.getVisibility() == View.VISIBLE || groupsView.getVisibility() == View.VISIBLE || balanceView.getVisibility() == View.VISIBLE || expiryView.getVisibility() == View.VISIBLE) {
+            bottomSheet.setVisibility(View.VISIBLE);
+        }
+        else
+        {
+            bottomSheet.setVisibility(View.GONE);
+        }
+    }
+
+    private void redrawBarcodeAfterResize()
+    {
+        if (format != null) {
+            barcodeImage.getViewTreeObserver().addOnGlobalLayoutListener(
+                    new ViewTreeObserver.OnGlobalLayoutListener() {
+                        @Override
+                        public void onGlobalLayout() {
+                            barcodeImage.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+
+                            Log.d(TAG, "ImageView size now known");
+                            new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
+                        }
+                    });
+        };
+    }
+
+    /**
+     * When enabled, hides the status bar and moves the barcode to the top of the screen.
+     *
+     * The purpose of this function is to make sure the barcode can be scanned from the phone
+     * by machines which offer no space to insert the complete device.
+     */
+    private void setFullscreen(boolean enable)
+    {
+        ActionBar actionBar = getSupportActionBar();
+        if(enable)
+        {
+            Log.d(TAG, "Move into of fullscreen");
+            // Prepare redraw after size change
+            redrawBarcodeAfterResize();
+
+            // Hide maximize and show minimize button and scaler
+            maximizeButton.setVisibility(View.GONE);
+            minimizeButton.setVisibility(View.VISIBLE);
+            barcodeScaler.setVisibility(View.VISIBLE);
+
+            // Hide actionbar
+            if(actionBar != null)
+            {
+                actionBar.hide();
+            }
+
+            // Hide toolbars
+            //
+            // Appbar needs to be invisible and have padding removed
+            // Or the barcode will be centered instead of on top of the screen
+            // Don't ask me why...
+            appBarLayout.setVisibility(View.INVISIBLE);
+            appBarLayout.setPadding(0, 0, 0, 0);
+            collapsingToolbarLayout.setVisibility(View.GONE);
+            findViewById(R.id.toolbar_landscape).setVisibility(View.GONE);
+
+            // Hide other UI elements
+            cardIdFieldView.setVisibility(View.GONE);
+            bottomSheet.setVisibility(View.GONE);
+            behavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
+            editButton.hide();
+
+            // Set Android to fullscreen mode
+            getWindow().getDecorView().setSystemUiVisibility(
+                    getWindow().getDecorView().getSystemUiVisibility()
+                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                            | View.SYSTEM_UI_FLAG_FULLSCREEN
+            );
+
+            // Set current state
+            barcodeIsFullscreen = true;
+        }
+        else if(!enable)
+        {
+            Log.d(TAG, "Move out of fullscreen");
+
+            // Reset center guideline
+            barcodeScaler.setProgress(100);
+
+            // Prepare redraw after size change
+            redrawBarcodeAfterResize();
+
+            // Show maximize and hide minimize button and scaler
+            maximizeButton.setVisibility(View.VISIBLE);
+            minimizeButton.setVisibility(View.GONE);
+            barcodeScaler.setVisibility(View.GONE);
+
+            // Show actionbar
+            if(actionBar != null)
+            {
+                actionBar.show();
+            }
+
+            // Show appropriate toolbar
+            // And restore 24dp paddingTop for appBarLayout
+            appBarLayout.setVisibility(View.VISIBLE);
+            DisplayMetrics metrics = new DisplayMetrics();
+            getWindowManager().getDefaultDisplay().getMetrics(metrics);
+            appBarLayout.setPadding(0, (int) Math.ceil(metrics.density * 24), 0, 0);
+            setupOrientation();
+
+            // Show other UI elements
+            cardIdFieldView.setVisibility(View.VISIBLE);
+            makeBottomSheetVisibleIfUseful();
+            editButton.show();
+
+            // Unset fullscreen mode
+            getWindow().getDecorView().setSystemUiVisibility(
+                    getWindow().getDecorView().getSystemUiVisibility()
+                            & ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                            & ~View.SYSTEM_UI_FLAG_FULLSCREEN
+            );
+
+            // Set current state
+            barcodeIsFullscreen = false;
+        }
+    }
+}

app/src/main/java/protect/card_locker/MainActivity.java

@@ -1,84 +1,240 @@
 package protect.card_locker;
 
+import android.app.SearchManager;
 import android.content.ClipData;
-import android.content.DialogInterface;
-import android.content.Intent;
 import android.content.ClipboardManager;
+import android.content.Context;
+import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
+import android.content.res.Configuration;
 import android.database.Cursor;
 import android.os.Bundle;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.SearchView;
+import androidx.appcompat.widget.Toolbar;
 import android.util.Log;
 import android.view.ContextMenu;
+import android.view.GestureDetector;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.MotionEvent;
 import android.view.View;
-import android.webkit.WebView;
 import android.widget.AdapterView;
 import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.tabs.TabLayout;
+import java.util.List;
 
-import com.google.common.collect.ImmutableMap;
+import protect.card_locker.preferences.SettingsActivity;
 
-import java.util.Calendar;
-import java.util.Map;
-
-import protect.card_locker.intro.IntroActivity;
-
-public class MainActivity extends AppCompatActivity
+public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
+
+    private Menu menu;
+    private GestureDetector gestureDetector;
+    protected String filter = "";
+    protected int selectedTab = 0;
 
     @Override
     protected void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main_activity);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        updateLoyaltyCardList();
+        updateLoyaltyCardList(filter, null);
 
-        SharedPreferences prefs = getSharedPreferences("protect.card_locker", MODE_PRIVATE);
-        if (prefs.getBoolean("firstrun", true)) {
-            startIntro();
-            prefs.edit().putBoolean("firstrun", false).commit();
+        TabLayout groupsTabLayout = findViewById(R.id.groups);
+        groupsTabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                selectedTab = tab.getPosition();
+                updateLoyaltyCardList(filter, tab.getTag());
+
+                // Store active tab in Shared Preference to restore next app launch
+                SharedPreferences activeTabPref = getApplicationContext().getSharedPreferences(
+                        getString(R.string.sharedpreference_active_tab),
+                        Context.MODE_PRIVATE);
+                SharedPreferences.Editor activeTabPrefEditor = activeTabPref.edit();
+                activeTabPrefEditor.putInt(getString(R.string.sharedpreference_active_tab), selectedTab);
+                activeTabPrefEditor.apply();
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+
+            }
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+
+            }
+        });
+
+        gestureDetector = new GestureDetector(this, this);
+
+        View.OnTouchListener gestureTouchListener = new View.OnTouchListener() {
+            @Override
+            public boolean onTouch(final View v, final MotionEvent event){
+                return gestureDetector.onTouchEvent(event);
+            }
+        };
+
+        final View helpText = findViewById(R.id.helpText);
+        final View noMatchingCardsText = findViewById(R.id.noMatchingCardsText);
+        final View list = findViewById(R.id.list);
+
+        helpText.setOnTouchListener(gestureTouchListener);
+        noMatchingCardsText.setOnTouchListener(gestureTouchListener);
+        list.setOnTouchListener(gestureTouchListener);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        if (menu != null)
+        {
+            SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
+
+            if (!searchView.isIconified()) {
+                filter = searchView.getQuery().toString();
+            }
+        }
+
+        // Start of active tab logic
+        TabLayout groupsTabLayout = findViewById(R.id.groups);
+        updateTabGroups(groupsTabLayout);
+
+        // Restore active tab from Shared Preference
+        SharedPreferences activeTabPref = getApplicationContext().getSharedPreferences(
+                getString(R.string.sharedpreference_active_tab),
+                Context.MODE_PRIVATE);
+        selectedTab = activeTabPref.getInt(getString(R.string.sharedpreference_active_tab), 0);
+
+        Object group = null;
+
+        if (groupsTabLayout.getTabCount() != 0) {
+            TabLayout.Tab tab = groupsTabLayout.getTabAt(selectedTab);
+            if (tab == null) {
+                tab = groupsTabLayout.getTabAt(0);
+            }
+
+            groupsTabLayout.selectTab(tab);
+            assert tab != null;
+            group = tab.getTag();
+        }
+        updateLoyaltyCardList(filter, group);
+        // End of active tab logic
+
+        FloatingActionButton addButton = findViewById(R.id.fabAdd);
+        addButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent i = new Intent(getApplicationContext(), ScanActivity.class);
+                startActivityForResult(i, Utils.BARCODE_SCAN);
+            }
+        });
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
+        super.onActivityResult(requestCode, resultCode, intent);
+
+        if (requestCode == Utils.MAIN_REQUEST) {
+            // We're coming back from another view so clear the search
+            // We only do this now to prevent a flash of all entries right after picking one
+            filter = "";
+            if (menu != null)
+            {
+                MenuItem searchItem = menu.findItem(R.id.action_search);
+                searchItem.collapseActionView();
+            }
+
+            // In case the theme changed
+            recreate();
+
+            return;
+        }
+
+        BarcodeValues barcodeValues = Utils.parseSetBarcodeActivityResult(requestCode, resultCode, intent);
+
+        if(!barcodeValues.isEmpty()) {
+            Intent newIntent = new Intent(getApplicationContext(), LoyaltyCardEditActivity.class);
+            Bundle newBundle = new Bundle();
+            newBundle.putString("barcodeType", barcodeValues.format());
+            newBundle.putString("cardId", barcodeValues.content());
+            newIntent.putExtras(newBundle);
+            startActivity(newIntent);
         }
     }
 
     @Override
-    protected void onResume()
-    {
-        super.onResume();
+    public void onBackPressed() {
+        if (menu == null)
+        {
+            super.onBackPressed();
+            return;
+        }
 
-        updateLoyaltyCardList();
+        SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
+
+        if (!searchView.isIconified()) {
+            searchView.setIconified(true);
+        } else {
+            TabLayout groupsTabLayout = findViewById(R.id.groups);
+
+            if (groupsTabLayout.getVisibility() == View.VISIBLE && selectedTab != 0) {
+                selectedTab = 0;
+                groupsTabLayout.selectTab(groupsTabLayout.getTabAt(0));
+            } else {
+                super.onBackPressed();
+            }
+        }
     }
 
-    private void updateLoyaltyCardList()
+    private void updateLoyaltyCardList(String filterText, Object tag)
     {
-        final ListView cardList = (ListView) findViewById(R.id.list);
-        final TextView helpText = (TextView) findViewById(R.id.helpText);
+        Group group = null;
+        if (tag != null) {
+            group = (Group) tag;
+        }
+
+        final ListView cardList = findViewById(R.id.list);
+        final TextView helpText = findViewById(R.id.helpText);
+        final TextView noMatchingCardsText = findViewById(R.id.noMatchingCardsText);
         final DBHelper db = new DBHelper(this);
 
+        Cursor cardCursor = db.getLoyaltyCardCursor(filterText, group);
+
         if(db.getLoyaltyCardCount() > 0)
         {
+            // We want the cardList to be visible regardless of the filtered match count
+            // to ensure that the noMatchingCardsText doesn't end up being shown below
+            // the keyboard
             cardList.setVisibility(View.VISIBLE);
             helpText.setVisibility(View.GONE);
+            if(cardCursor.getCount() > 0)
+            {
+                noMatchingCardsText.setVisibility(View.GONE);
+            }
+            else
+            {
+                noMatchingCardsText.setVisibility(View.VISIBLE);
+            }
         }
         else
         {
             cardList.setVisibility(View.GONE);
             helpText.setVisibility(View.VISIBLE);
+            noMatchingCardsText.setVisibility(View.GONE);
         }
 
-        Cursor cardCursor = db.getLoyaltyCardCursor();
-
         final LoyaltyCardCursorAdapter adapter = new LoyaltyCardCursorAdapter(this, cardCursor);
         cardList.setAdapter(adapter);
 
@@ -96,16 +252,44 @@ public class MainActivity extends AppCompatActivity
                 i.setAction("");
                 final Bundle b = new Bundle();
                 b.putInt("id", loyaltyCard.id);
-                b.putBoolean("view", true);
                 i.putExtras(b);
 
                 ShortcutHelper.updateShortcuts(MainActivity.this, loyaltyCard, i);
 
-                startActivity(i);
+                startActivityForResult(i, Utils.MAIN_REQUEST);
             }
         });
     }
 
+    public void updateTabGroups(TabLayout groupsTabLayout)
+    {
+        final DBHelper db = new DBHelper(this);
+
+        List<Group> newGroups = db.getGroups();
+
+        if (newGroups.size() == 0) {
+            groupsTabLayout.removeAllTabs();
+            groupsTabLayout.setVisibility(View.GONE);
+            return;
+        }
+
+        groupsTabLayout.removeAllTabs();
+
+        TabLayout.Tab allTab = groupsTabLayout.newTab();
+        allTab.setText(R.string.all);
+        allTab.setTag(null);
+        groupsTabLayout.addTab(allTab, false);
+
+        for (Group group : newGroups) {
+            TabLayout.Tab tab = groupsTabLayout.newTab();
+            tab.setText(group._id);
+            tab.setTag(group);
+            groupsTabLayout.addTab(tab, false);
+        }
+
+        groupsTabLayout.setVisibility(View.VISIBLE);
+    }
+
     @Override
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
     {
@@ -121,12 +305,12 @@ public class MainActivity extends AppCompatActivity
     public boolean onContextItemSelected(MenuItem item)
     {
         AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
-        ListView listView = (ListView) findViewById(R.id.list);
+        ListView listView = findViewById(R.id.list);
 
         Cursor cardCursor = (Cursor)listView.getItemAtPosition(info.position);
         LoyaltyCard card = LoyaltyCard.toLoyaltyCard(cardCursor);
 
-        if(card != null && item.getItemId() == R.id.action_clipboard)
+        if(item.getItemId() == R.id.action_clipboard)
         {
             ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
             ClipData clip = ClipData.newPlainText(card.store, card.cardId);
@@ -135,6 +319,12 @@ public class MainActivity extends AppCompatActivity
             Toast.makeText(this, R.string.copy_to_clipboard_toast, Toast.LENGTH_LONG).show();
             return true;
         }
+        else if(item.getItemId() == R.id.action_share)
+        {
+            final ImportURIHelper importURIHelper = new ImportURIHelper(this);
+            importURIHelper.startShareIntent(card);
+            return true;
+        }
 
         return super.onContextItemSelected(item);
     }
@@ -142,7 +332,47 @@ public class MainActivity extends AppCompatActivity
     @Override
     public boolean onCreateOptionsMenu(Menu menu)
     {
+        this.menu = menu;
+
         getMenuInflater().inflate(R.menu.main_menu, menu);
+
+        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
+        if (searchManager != null) {
+            SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
+            searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
+            searchView.setSubmitButtonEnabled(false);
+
+            searchView.setOnCloseListener(new SearchView.OnCloseListener() {
+                @Override
+                public boolean onClose() {
+                    invalidateOptionsMenu();
+                    return false;
+                }
+            });
+
+            searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+                @Override
+                public boolean onQueryTextSubmit(String query) {
+                    return false;
+                }
+
+                @Override
+                public boolean onQueryTextChange(String newText) {
+                    filter = newText;
+
+                    TabLayout groupsTabLayout = findViewById(R.id.groups);
+                    TabLayout.Tab currentTab = groupsTabLayout.getTabAt(groupsTabLayout.getSelectedTabPosition());
+
+                    updateLoyaltyCardList(
+                        newText,
+                        currentTab != null ? currentTab.getTag() : null
+                    );
+
+                    return true;
+                }
+            });
+        }
+
         return super.onCreateOptionsMenu(menu);
     }
 
@@ -151,123 +381,111 @@ public class MainActivity extends AppCompatActivity
     {
         int id = item.getItemId();
 
-        if (id == R.id.action_add)
+        if (id == R.id.action_manage_groups)
         {
-            Intent i = new Intent(getApplicationContext(), LoyaltyCardViewActivity.class);
-            startActivity(i);
+            Intent i = new Intent(getApplicationContext(), ManageGroupsActivity.class);
+            startActivityForResult(i, Utils.MAIN_REQUEST);
             return true;
         }
 
         if(id == R.id.action_import_export)
         {
             Intent i = new Intent(getApplicationContext(), ImportExportActivity.class);
-            startActivity(i);
+            startActivityForResult(i, Utils.MAIN_REQUEST);
             return true;
         }
 
-        if(id == R.id.action_intro)
+        if(id == R.id.action_settings)
         {
-            startIntro();
+            Intent i = new Intent(getApplicationContext(), SettingsActivity.class);
+            startActivityForResult(i, Utils.MAIN_REQUEST);
             return true;
         }
 
         if(id == R.id.action_about)
         {
-            displayAboutDialog();
+            Intent i = new Intent(getApplicationContext(), AboutActivity.class);
+            startActivityForResult(i, Utils.MAIN_REQUEST);
             return true;
         }
 
         return super.onOptionsItemSelected(item);
     }
 
-    private void displayAboutDialog()
+    protected static boolean isDarkModeEnabled(Context inputContext)
     {
-        final Map<String, String> USED_LIBRARIES = ImmutableMap.of
-        (
-            "Commons CSV", "https://commons.apache.org/proper/commons-csv/",
-            "Guava", "https://github.com/google/guava",
-            "ZXing", "https://github.com/zxing/zxing",
-            "ZXing Android Embedded", "https://github.com/journeyapps/zxing-android-embedded",
-            "AppIntro", "https://github.com/apl-devs/AppIntro"
-        );
-
-        final Map<String, String> USED_ASSETS = ImmutableMap.of
-        (
-            "Save by Bernar Novalyi", "https://thenounproject.com/term/save/716011"
-        );
-
-        StringBuilder libs = new StringBuilder().append("<ul>");
-        for (Map.Entry<String, String> entry : USED_LIBRARIES.entrySet())
-        {
-            libs.append("<li><a href=\"").append(entry.getValue()).append("\">").append(entry.getKey()).append("</a></li>");
-        }
-        libs.append("</ul>");
-
-        StringBuilder resources = new StringBuilder().append("<ul>");
-        for (Map.Entry<String, String> entry : USED_ASSETS.entrySet())
-        {
-            resources.append("<li><a href=\"").append(entry.getValue()).append("\">").append(entry.getKey()).append("</a></li>");
-        }
-        resources.append("</ul>");
-
-        String appName = getString(R.string.app_name);
-        int year = Calendar.getInstance().get(Calendar.YEAR);
-
-        String version = "?";
-        try
-        {
-            PackageInfo pi = getPackageManager().getPackageInfo(getPackageName(), 0);
-            version = pi.versionName;
-        }
-        catch (PackageManager.NameNotFoundException e)
-        {
-            Log.w(TAG, "Package name not found", e);
-        }
-
-        WebView wv = new WebView(this);
-        String html =
-            "<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\" />" +
-            "<img src=\"file:///android_res/mipmap/ic_launcher.png\" alt=\"" + appName + "\"/>" +
-            "<h1>" +
-            String.format(getString(R.string.about_title_fmt),
-                    "<a href=\"" + getString(R.string.app_webpage_url)) + "\">" +
-            appName +
-            "</a>" +
-            "</h1><p>" +
-            appName +
-            " " +
-            String.format(getString(R.string.debug_version_fmt), version) +
-            "</p><p>" +
-            String.format(getString(R.string.app_revision_fmt),
-                    "<a href=\"" + getString(R.string.app_revision_url) + "\">" +
-                            getString(R.string.app_revision_url) +
-                            "</a>") +
-            "</p><hr/><p>" +
-            String.format(getString(R.string.app_copyright_fmt), year) +
-            "</p><hr/><p>" +
-            getString(R.string.app_license) +
-            "</p><hr/><p>" +
-            String.format(getString(R.string.app_libraries), appName, libs.toString()) +
-            "</p><hr/><p>" +
-            String.format(getString(R.string.app_resources), appName, resources.toString());
-
-        wv.loadDataWithBaseURL("file:///android_res/drawable/", html, "text/html", "utf-8", null);
-        new AlertDialog.Builder(this)
-            .setView(wv)
-            .setCancelable(true)
-            .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener()
-            {
-                public void onClick(DialogInterface dialog, int which)
-                {
-                    dialog.dismiss();
-                }
-            })
-            .show();
+        Configuration config = inputContext.getResources().getConfiguration();
+        int currentNightMode = config.uiMode & Configuration.UI_MODE_NIGHT_MASK;
+        return (currentNightMode == Configuration.UI_MODE_NIGHT_YES);
     }
 
-    private void startIntro()
-    {
-        Intent intent = new Intent(this, IntroActivity.class);
-        startActivity(intent);
+    @Override
+    public boolean onDown(MotionEvent e) {
+        return false;
+    }
+
+    @Override
+    public void onShowPress(MotionEvent e) {
+
+    }
+
+    @Override
+    public boolean onSingleTapUp(MotionEvent e) {
+        return false;
+    }
+
+    @Override
+    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
+        return false;
+    }
+
+    @Override
+    public void onLongPress(MotionEvent e) {
+
+    }
+
+    @Override
+    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
+        Log.d(TAG, "On fling");
+
+        // Don't swipe if we have too much vertical movement
+        if (Math.abs(velocityY) > (0.75 * Math.abs(velocityX))) {
+            return false;
+        }
+
+        TabLayout groupsTabLayout = findViewById(R.id.groups);
+        if (groupsTabLayout.getTabCount() < 2) {
+            return false;
+        }
+
+        Integer currentTab = groupsTabLayout.getSelectedTabPosition();
+
+        // Swipe right
+        if (velocityX < -150) {
+            Integer nextTab = currentTab + 1;
+
+            if (nextTab == groupsTabLayout.getTabCount()) {
+                groupsTabLayout.selectTab(groupsTabLayout.getTabAt(0));
+            } else {
+                groupsTabLayout.selectTab(groupsTabLayout.getTabAt(nextTab));
+            }
+
+            return true;
+        }
+
+        // Swipe left
+        if (velocityX > 150) {
+            Integer nextTab = currentTab - 1;
+
+            if (nextTab < 0) {
+                groupsTabLayout.selectTab(groupsTabLayout.getTabAt(groupsTabLayout.getTabCount() - 1));
+            } else {
+                groupsTabLayout.selectTab(groupsTabLayout.getTabAt(nextTab));
+            }
+
+            return true;
+        }
+
+        return false;
     }
 }

app/src/main/java/protect/card_locker/ManageGroupsActivity.java

@@ -0,0 +1,255 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.text.InputType;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.WindowManager;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+
+import java.util.List;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+
+public class ManageGroupsActivity extends AppCompatActivity
+{
+    private static final String TAG = "Catima";
+
+    private final DBHelper db = new DBHelper(this);
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.manage_groups_activity);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        updateGroupList();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        updateGroupList();
+
+        FloatingActionButton addButton = findViewById(R.id.fabAdd);
+        addButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                createGroup();
+            }
+        });
+    }
+
+    @Override
+    public void onBackPressed() {
+        super.onBackPressed();
+    }
+
+    private void updateGroupList()
+    {
+        final ListView groupList = findViewById(R.id.list);
+        final TextView helpText = findViewById(R.id.helpText);
+        final DBHelper db = new DBHelper(this);
+
+        if(db.getGroupCount() > 0)
+        {
+            groupList.setVisibility(View.VISIBLE);
+            helpText.setVisibility(View.GONE);
+        }
+        else
+        {
+            groupList.setVisibility(View.GONE);
+            helpText.setVisibility(View.VISIBLE);
+        }
+
+        Cursor groupCursor = db.getGroupCursor();
+
+        final GroupCursorAdapter adapter = new GroupCursorAdapter(this, groupCursor);
+        groupList.setAdapter(adapter);
+
+        registerForContextMenu(groupList);
+    }
+
+    private void invalidateHomescreenActiveTab()
+    {
+        SharedPreferences activeTabPref = getApplicationContext().getSharedPreferences(
+                getString(R.string.sharedpreference_active_tab),
+                Context.MODE_PRIVATE);
+        SharedPreferences.Editor activeTabPrefEditor = activeTabPref.edit();
+        activeTabPrefEditor.putInt(getString(R.string.sharedpreference_active_tab), 0);
+        activeTabPrefEditor.apply();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item)
+    {
+        int id = item.getItemId();
+
+        if (id == android.R.id.home) {
+            finish();
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    public void moveGroupUp(View view) {
+        moveGroup(view, true);
+    }
+
+    public void moveGroupDown(View view) {
+        moveGroup(view, false);
+    }
+
+    public void editGroup(View view) {
+        final String groupName = getGroupname(view);
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.enter_group_name);
+        final EditText input = new EditText(this);
+        input.setInputType(InputType.TYPE_CLASS_TEXT);
+        input.setText(groupName);
+        builder.setView(input);
+
+        builder.setPositiveButton(getString(R.string.ok), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                db.updateGroup(groupName, input.getText().toString());
+                updateGroupList();
+            }
+        });
+        builder.setNegativeButton(getString(R.string.cancel), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                dialog.cancel();
+            }
+        });
+        AlertDialog dialog = builder.create();
+        dialog.show();
+        dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
+        input.requestFocus();
+    }
+
+    public void deleteGroup(View view) {
+        final String groupName = getGroupname(view);
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.deleteConfirmationGroup);
+        builder.setMessage(groupName);
+
+        builder.setPositiveButton(getString(R.string.ok), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                db.deleteGroup(groupName);
+                updateGroupList();
+                // Delete may change ordering, so invalidate
+                invalidateHomescreenActiveTab();
+            }
+        });
+        builder.setNegativeButton(getString(R.string.cancel), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                dialog.cancel();
+            }
+        });
+        AlertDialog dialog = builder.create();
+        dialog.show();
+    }
+
+    private void createGroup() {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.enter_group_name);
+        final EditText input = new EditText(this);
+        input.setInputType(InputType.TYPE_CLASS_TEXT);
+        builder.setView(input);
+
+        builder.setPositiveButton(getString(R.string.ok), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                db.insertGroup(input.getText().toString());
+                updateGroupList();
+            }
+        });
+        builder.setNegativeButton(getString(R.string.cancel), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                dialog.cancel();
+            }
+        });
+        AlertDialog dialog = builder.create();
+        dialog.show();
+        dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
+        input.requestFocus();
+    }
+
+    private String getGroupname(View view) {
+        LinearLayout parentRow = (LinearLayout) view.getParent().getParent();
+        TextView groupNameTextView = parentRow.findViewById(R.id.name);
+        return (String) groupNameTextView.getText();
+    }
+
+    private void moveGroup(View view, boolean up) {
+        final String groupName = getGroupname(view);
+
+        List<Group> groups = db.getGroups();
+
+        int currentIndex = -1;
+        Integer newIndex;
+
+        // Get current index in group list
+        for (int i = 0; i < groups.size(); i++) {
+            if (groups.get(i)._id.equals(groupName)) {
+                currentIndex = i;
+
+                break;
+            }
+        }
+
+        if (currentIndex == -1) {
+            throw new IndexOutOfBoundsException();
+        }
+
+        // Reinsert group in correct position
+        if (up) {
+            newIndex = currentIndex - 1;
+        } else {
+            newIndex = currentIndex + 1;
+        }
+
+        // Don't try to move out of bounds
+        if (newIndex < 0 || newIndex >= groups.size()) {
+            return;
+        }
+
+        Group group = groups.remove(currentIndex);
+        groups.add(newIndex, group);
+
+        // Update database
+        db.reorderGroups(groups);
+
+        // Update UI
+        updateGroupList();
+
+        // Ordering may have changed, so invalidate
+        invalidateHomescreenActiveTab();
+    }
+}

app/src/main/java/protect/card_locker/MultiFormatExporter.java

@@ -7,7 +7,7 @@ import java.io.OutputStreamWriter;
 
 public class MultiFormatExporter
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
 
     /**
      * Attempts to export data to the output stream in the

app/src/main/java/protect/card_locker/MultiFormatImporter.java

@@ -7,7 +7,7 @@ import java.io.InputStreamReader;
 
 public class MultiFormatImporter
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    private static final String TAG = "Catima";
 
     /**
      * Attempts to import data from the input stream of the
@@ -31,32 +31,23 @@ public class MultiFormatImporter
                 break;
         }
 
-        if(importer != null)
+        if (importer != null)
         {
             try
             {
                 importer.importData(db, input);
                 return true;
             }
-            catch(IOException e)
+            catch(IOException | FormatException | InterruptedException e)
             {
-                Log.e(TAG, "Failed to input data", e);
-            }
-            catch(FormatException e)
-            {
-                Log.e(TAG, "Failed to input data", e);
-            }
-            catch(InterruptedException e)
-            {
-                Log.e(TAG, "Failed to input data", e);
+                Log.e(TAG, "Failed to import data", e);
             }
 
-            return false;
         }
         else
         {
             Log.e(TAG, "Unsupported data format imported: " + format.name());
-            return false;
         }
+        return false;
     }
 }

app/src/main/java/protect/card_locker/ScanActivity.java

@@ -0,0 +1,157 @@
+package protect.card_locker;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.view.MenuItem;
+import android.view.View;
+
+import com.google.zxing.ResultPoint;
+import com.google.zxing.client.android.Intents;
+import com.journeyapps.barcodescanner.BarcodeCallback;
+import com.journeyapps.barcodescanner.BarcodeResult;
+import com.journeyapps.barcodescanner.CaptureManager;
+import com.journeyapps.barcodescanner.DecoratedBarcodeView;
+
+import java.util.List;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+
+/**
+ * Custom Scannner Activity extending from Activity to display a custom layout form scanner view.
+ *
+ * Based on https://github.com/journeyapps/zxing-android-embedded/blob/0fdfbce9fb3285e985bad9971c5f7c0a7a334e7b/sample/src/main/java/example/zxing/CustomScannerActivity.java
+ * originally licensed under Apache 2.0
+ */
+public class ScanActivity extends AppCompatActivity {
+    private static final String TAG = "Catima";
+
+    private CaptureManager capture;
+    private DecoratedBarcodeView barcodeScannerView;
+
+    private String cardId;
+
+    private void extractIntentFields(Intent intent) {
+        final Bundle b = intent.getExtras();
+        cardId = b != null ? b.getString("cardId") : null;
+        Log.d(TAG, "Scan activity: id=" + cardId);
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.scan_activity);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        extractIntentFields(getIntent());
+
+        barcodeScannerView = findViewById(R.id.zxing_barcode_scanner);
+
+        // Even though we do the actual decoding with the barcodeScannerView
+        // CaptureManager needs to be running to show the camera and scanning bar
+        capture = new CaptureManager(this, barcodeScannerView);
+        Intent captureIntent = new Intent();
+        Bundle captureIntentBundle = new Bundle();
+        captureIntentBundle.putBoolean(Intents.Scan.BEEP_ENABLED, false);
+        captureIntent.putExtras(captureIntentBundle);
+        capture.initializeFromIntent(captureIntent, savedInstanceState);
+
+        barcodeScannerView.decodeSingle(new BarcodeCallback() {
+            @Override
+            public void barcodeResult(BarcodeResult result) {
+                Intent scanResult = new Intent();
+                Bundle scanResultBundle = new Bundle();
+                scanResultBundle.putString(BarcodeSelectorActivity.BARCODE_CONTENTS, result.getText());
+                scanResultBundle.putString(BarcodeSelectorActivity.BARCODE_FORMAT, result.getBarcodeFormat().toString());
+                scanResult.putExtras(scanResultBundle);
+                ScanActivity.this.setResult(RESULT_OK, scanResult);
+                finish();
+            }
+
+            @Override
+            public void possibleResultPoints(List<ResultPoint> resultPoints) {
+
+            }
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        capture.onResume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        capture.onPause();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        capture.onDestroy();
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        capture.onSaveInstanceState(outState);
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        return barcodeScannerView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item)
+    {
+        if (item.getItemId() == android.R.id.home)
+        {
+            setResult(Activity.RESULT_CANCELED);
+            finish();
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent intent)
+    {
+        super.onActivityResult(requestCode, resultCode, intent);
+
+        BarcodeValues barcodeValues = Utils.parseSetBarcodeActivityResult(requestCode, resultCode, intent);
+
+        if (!barcodeValues.isEmpty()) {
+            Intent manualResult = new Intent();
+            Bundle manualResultBundle = new Bundle();
+            manualResultBundle.putString(BarcodeSelectorActivity.BARCODE_CONTENTS, barcodeValues.content());
+            manualResultBundle.putString(BarcodeSelectorActivity.BARCODE_FORMAT, barcodeValues.format());
+            manualResult.putExtras(manualResultBundle);
+            ScanActivity.this.setResult(RESULT_OK, manualResult);
+            finish();
+        }
+    }
+
+    public void addManually(View view) {
+        Intent i = new Intent(getApplicationContext(), BarcodeSelectorActivity.class);
+        if (cardId != null) {
+            final Bundle b = new Bundle();
+            b.putString("initialCardId", cardId);
+            i.putExtras(b);
+        }
+        startActivityForResult(i, Utils.SELECT_BARCODE_REQUEST);
+    }
+}

app/src/main/java/protect/card_locker/Utils.java

@@ -0,0 +1,128 @@
+package protect.card_locker;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Color;
+import android.util.Log;
+
+import java.math.BigDecimal;
+import java.text.NumberFormat;
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.Currency;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.List;
+import java.util.Locale;
+
+import androidx.core.graphics.ColorUtils;
+
+public class Utils {
+    private static final String TAG = "Catima";
+
+    // Activity request codes
+    public static final int MAIN_REQUEST = 1;
+    public static final int SELECT_BARCODE_REQUEST = 2;
+    public static final int BARCODE_SCAN = 3;
+
+    static final double LUMINANCE_MIDPOINT = 0.5;
+
+    static public LetterBitmap generateIcon(Context context, String store, Integer backgroundColor) {
+        if (store.length() == 0) {
+            return null;
+        }
+
+        int tileLetterFontSize = context.getResources().getDimensionPixelSize(R.dimen.tileLetterFontSize);
+        int pixelSize = context.getResources().getDimensionPixelSize(R.dimen.cardThumbnailSize);
+
+        if (backgroundColor == null) {
+            backgroundColor = LetterBitmap.getDefaultColor(context, store);
+        }
+
+        return new LetterBitmap(context, store, store,
+                tileLetterFontSize, pixelSize, pixelSize, backgroundColor, needsDarkForeground(backgroundColor) ? Color.BLACK : Color.WHITE);
+    }
+
+    static public boolean needsDarkForeground(Integer backgroundColor) {
+        return ColorUtils.calculateLuminance(backgroundColor) > LUMINANCE_MIDPOINT;
+    }
+
+    static public BarcodeValues parseSetBarcodeActivityResult(int requestCode, int resultCode, Intent intent) {
+        String contents = null;
+        String format = null;
+
+        if (resultCode == Activity.RESULT_OK)
+        {
+            if (requestCode == Utils.BARCODE_SCAN) {
+                Log.i(TAG, "Received barcode information from camera");
+            } else if (requestCode == Utils.SELECT_BARCODE_REQUEST) {
+                Log.i(TAG, "Received barcode information from typing it");
+            } else {
+                return new BarcodeValues(null, null);
+            }
+
+            contents = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_CONTENTS);
+            format = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_FORMAT);
+        }
+
+        Log.i(TAG, "Read barcode id: " + contents);
+        Log.i(TAG, "Read format: " + format);
+
+        return new BarcodeValues(format, contents);
+    }
+
+    static public Boolean hasExpired(Date expiryDate) {
+        // today
+        Calendar date = new GregorianCalendar();
+        // reset hour, minutes, seconds and millis
+        date.set(Calendar.HOUR_OF_DAY, 0);
+        date.set(Calendar.MINUTE, 0);
+        date.set(Calendar.SECOND, 0);
+        date.set(Calendar.MILLISECOND, 0);
+
+        return expiryDate.before(date.getTime());
+    }
+
+    static public String formatBalance(Context context, BigDecimal value, Currency currency) {
+        NumberFormat numberFormat = NumberFormat.getInstance();
+
+        if (currency == null) {
+            numberFormat.setMaximumFractionDigits(0);
+            return context.getString(R.string.balancePoints, numberFormat.format(value));
+        }
+
+        NumberFormat currencyFormat = NumberFormat.getCurrencyInstance();
+        currencyFormat.setCurrency(currency);
+
+        return currencyFormat.format(value);
+    }
+
+    static public String formatBalanceWithoutCurrencySymbol(BigDecimal value, Currency currency) {
+        NumberFormat numberFormat = NumberFormat.getInstance();
+
+        if (currency == null) {
+            numberFormat.setMaximumFractionDigits(0);
+            return numberFormat.format(value);
+        }
+
+        numberFormat.setMinimumFractionDigits(currency.getDefaultFractionDigits());
+        numberFormat.setMaximumFractionDigits(currency.getDefaultFractionDigits());
+
+        return numberFormat.format(value);
+    }
+
+    static public BigDecimal parseCurrency(String value) throws NumberFormatException {
+        // There are many ways users can write a currency, so we fix it up a bit
+        // 1. Replace all commas with dots
+        value = value.replace(',', '.');
+
+        // 2. Remove all but the last dot
+        while (value.split("\\.").length > 2) {
+            value = value.replaceFirst("\\.", "");
+        }
+
+        // Parse as BigDecimal
+        return new BigDecimal(value);
+    }
+}

app/src/main/java/protect/card_locker/intro/IntroActivity.java

@@ -1,33 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-
-import com.github.paolorotolo.appintro.AppIntro;
-
-
-public class IntroActivity extends AppIntro
-{
-    @Override
-    public void init(Bundle savedInstanceState)
-    {
-        addSlide(new IntroSlide1());
-        addSlide(new IntroSlide2());
-        addSlide(new IntroSlide3());
-        addSlide(new IntroSlide4());
-        addSlide(new IntroSlide5());
-        addSlide(new IntroSlide6());
-    }
-
-    @Override
-    public void onSkipPressed(Fragment fragment) {
-        finish();
-    }
-
-    @Override
-    public void onDonePressed(Fragment fragment) {
-        finish();
-    }
-}
-
-

app/src/main/java/protect/card_locker/intro/IntroSlide1.java

@@ -1,19 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide1 extends Fragment
-{
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro1_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/intro/IntroSlide2.java

@@ -1,20 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide2 extends Fragment
-{
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro2_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/intro/IntroSlide3.java

@@ -1,19 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide3 extends Fragment
-{
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro3_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/intro/IntroSlide4.java

@@ -1,19 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide4 extends Fragment
-{
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro4_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/intro/IntroSlide5.java

@@ -1,19 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide5 extends Fragment
-{
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro5_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/intro/IntroSlide6.java

@@ -1,19 +0,0 @@
-package protect.card_locker.intro;
-
-import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import protect.card_locker.R;
-
-public class IntroSlide6 extends Fragment
-{
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
-    {
-        View v = inflater.inflate(R.layout.intro6_layout, container, false);
-        return v;
-    }
-}

app/src/main/java/protect/card_locker/preferences/Settings.java

@@ -0,0 +1,93 @@
+package protect.card_locker.preferences;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import androidx.preference.PreferenceManager;
+import androidx.annotation.IntegerRes;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatDelegate;
+
+import protect.card_locker.R;
+
+public class Settings
+{
+    private Context context;
+    private SharedPreferences settings;
+
+    public Settings(Context context)
+    {
+        this.context = context;
+        this.settings = PreferenceManager.getDefaultSharedPreferences(context);
+    }
+
+    private String getResString(@StringRes int resId)
+    {
+        return context.getString(resId);
+    }
+
+    private int getResInt(@IntegerRes int resId)
+    {
+        return context.getResources().getInteger(resId);
+    }
+
+    private String getString(@StringRes int keyId, String defaultValue)
+    {
+        return settings.getString(getResString(keyId), defaultValue);
+    }
+
+    private int getInt(@StringRes int keyId, @IntegerRes int defaultId)
+    {
+        return settings.getInt(getResString(keyId), getResInt(defaultId));
+    }
+
+    private boolean getBoolean(@StringRes int keyId, boolean defaultValue)
+    {
+        return settings.getBoolean(getResString(keyId), defaultValue);
+    }
+
+    public int getTheme()
+    {
+        String value = getString(R.string.settings_key_theme, getResString(R.string.settings_key_system_theme));
+
+        if(value.equals(getResString(R.string.settings_key_light_theme)))
+        {
+            return AppCompatDelegate.MODE_NIGHT_NO;
+        }
+        else if(value.equals(getResString(R.string.settings_key_dark_theme)))
+        {
+            return AppCompatDelegate.MODE_NIGHT_YES;
+        }
+
+        return AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
+    }
+
+    public int getCardTitleListFontSize()
+    {
+        return getInt(R.string.settings_key_card_title_list_font_size, R.integer.settings_card_title_list_font_size_sp);
+    }
+
+    public int getCardNoteListFontSize()
+    {
+        return getInt(R.string.settings_key_card_note_list_font_size, R.integer.settings_card_note_list_font_size_sp);
+    }
+
+    public int getCardTitleFontSize()
+    {
+        return getInt(R.string.settings_key_card_title_font_size, R.integer.settings_card_title_font_size_sp);
+    }
+
+    public int getCardIdFontSize()
+    {
+        return getInt(R.string.settings_key_card_id_font_size, R.integer.settings_card_id_font_size_sp);
+    }
+
+    public boolean useMaxBrightnessDisplayingBarcode()
+    {
+        return getBoolean(R.string.settings_key_display_barcode_max_brightness, true);
+    }
+
+    public boolean getLockBarcodeScreenOrientation()
+    {
+        return getBoolean(R.string.settings_key_lock_barcode_orientation, false);
+    }
+}

app/src/main/java/protect/card_locker/preferences/SettingsActivity.java

@@ -0,0 +1,111 @@
+package protect.card_locker.preferences;
+
+import android.os.Bundle;
+import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragmentCompat;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
+import android.view.MenuItem;
+
+import nl.invissvenska.numberpickerpreference.NumberDialogPreference;
+import nl.invissvenska.numberpickerpreference.NumberPickerPreferenceDialogFragment;
+import protect.card_locker.R;
+
+public class SettingsActivity extends AppCompatActivity
+{
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+
+        ActionBar actionBar = getSupportActionBar();
+        if(actionBar != null)
+        {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        // Display the fragment as the main content.
+        getSupportFragmentManager().beginTransaction()
+                .replace(android.R.id.content, new SettingsFragment())
+                .commit();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item)
+    {
+        int id = item.getItemId();
+
+        if(id == android.R.id.home)
+        {
+            finish();
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    public static class SettingsFragment extends PreferenceFragmentCompat
+    {
+        private static final String DIALOG_FRAGMENT_TAG = "SettingsFragment";
+        @Override
+        public void onCreatePreferences(Bundle savedInstanceState, String rootKey)
+        {
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.preferences);
+
+            Preference themePreference = findPreference(getResources().getString(R.string.settings_key_theme));
+            assert themePreference != null;
+            themePreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener()
+            {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object o)
+                {
+                    if(o.toString().equals(getResources().getString(R.string.settings_key_light_theme)))
+                    {
+                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
+                    }
+                    else if(o.toString().equals(getResources().getString(R.string.settings_key_dark_theme)))
+                    {
+                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
+                    }
+                    else
+                    {
+                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
+                    }
+
+                    FragmentActivity activity = getActivity();
+                    if (activity != null) {
+                        activity.recreate();
+                    }
+                    return true;
+                }
+            });
+        }
+
+        @Override
+        public void onDisplayPreferenceDialog(Preference preference)
+        {
+            if (preference instanceof NumberDialogPreference)
+            {
+                NumberDialogPreference dialogPreference = (NumberDialogPreference) preference;
+                DialogFragment dialogFragment = NumberPickerPreferenceDialogFragment
+                        .newInstance(
+                                dialogPreference.getKey(),
+                                dialogPreference.getMinValue(),
+                                dialogPreference.getMaxValue(),
+                                dialogPreference.getUnitText()
+                        );
+                dialogFragment.setTargetFragment(this, 0);
+                dialogFragment.show(getParentFragmentManager(), DIALOG_FRAGMENT_TAG);
+            }
+            else
+            {
+                super.onDisplayPreferenceDialog(preference);
+            }
+        }
+    }
+}
+