Release 1.4.1

Translations update from Weblate

.github/workflows/android.yml

@@ -0,0 +1,27 @@
+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: FindBugs
+      run: ./gradlew findbugs

.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

@@ -6,3 +6,5 @@
 .DS_Store
 /build
 /captures
+/app/release
+/app/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
-- yes | sdkmanager "platforms;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

@@ -1,94 +1,310 @@
+# Changelog
+
+## 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. (https://github.com/brarcher/loyalty-card-locker/pull/200)
-- Add options to configure the colors used for the store name font and background. (https://github.com/brarcher/loyalty-card-locker/pull/203)
-- Add options to adjust font sizes on the card listing page and single card page. (https://github.com/brarcher/loyalty-card-locker/pull/204)
+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. (https://github.com/brarcher/loyalty-card-locker/pull/197)
+
+- 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. (https://github.com/brarcher/loyalty-card-locker/pull/188)
-- Improved layout when viewing a card. (https://github.com/brarcher/loyalty-card-locker/pull/190)
+
+- 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). (https://github.com/brarcher/loyalty-card-locker/pull/184)
+
+- 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. (https://github.com/brarcher/loyalty-card-locker/pull/177)
-- Fix importing backups directly from the file system. (https://github.com/brarcher/loyalty-card-locker/pull/180)
-- Fix importing backups from certain types of content providers. (https://github.com/brarcher/loyalty-card-locker/pull/179)
+
+- 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. (https://github.com/brarcher/loyalty-card-locker/pull/170)
-- New icon and color scheme. (https://github.com/brarcher/loyalty-card-locker/pull/171)
+
+- 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)
 
@@ -96,43 +312,50 @@ 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
@@ -144,17 +367,18 @@ 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)
@@ -163,7 +387,6 @@ 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

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://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-01.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-01.png)
-[<img src="https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-03.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-03.png)
-[<img src="https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-02.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-02.png)
-
-[<img src="https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-04.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-04.png)
-[<img src="https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-05.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-05.png)
-[<img src="https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-06.png" width=250>](https://github.com/brarcher/loyalty-card-locker/raw/master/metadata/en-US/images/phoneScreenshots/screenshot-06.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/build.gradle

@@ -7,20 +7,24 @@ findbugs {
 }
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 29
 
     defaultConfig {
-        applicationId "protect.card_locker"
-        minSdkVersion 17
-        targetSdkVersion 27
-        versionCode 24
-        versionName "0.22"
+        applicationId "me.hackerchick.catima"
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode 49
+        versionName "1.4.1"
+        vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
+        debug {
+            applicationIdSuffix ".debug"
+        }
     }
     lintOptions {
         disable "GoogleAppIndexingWarning"
@@ -37,26 +41,23 @@ android {
             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.android.support:support-v4:27.0.2'
-    compile 'com.journeyapps:zxing-android-embedded:3.5.0@aar'
-    compile 'com.google.zxing:core:3.3.0'
-    compile 'org.apache.commons:commons-csv:1.5'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
-    compile 'com.jaredrummler:colorpicker:1.0.2'
-    compile group: 'com.google.guava', name: 'guava', version: '20.0'
-    compile 'com.github.apl-devs:appintro:v4.2.0'
-    compile "com.vanniktech:vntnumberpickerpreference:1.0.0"
-    testCompile 'junit:junit:4.12'
-    testCompile "org.robolectric:robolectric:3.3.2"
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    implementation 'com.journeyapps:zxing-android-embedded:3.5.0@aar'
+    implementation 'com.google.zxing:core:3.3.0'
+    implementation 'org.apache.commons:commons-csv:1.5'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.jaredrummler:colorpicker:1.0.2'
+    implementation group: 'com.google.guava', name: 'guava', version: '20.0'
+    implementation "com.vanniktech:vntnumberpickerpreference:1.0.0"
+    implementation 'androidx.cardview:cardview:1.0.0'
+    testImplementation 'junit:junit:4.12'
+    testImplementation "org.robolectric:robolectric:4.0.2"
 }
 
 task findbugs(type: FindBugs, dependsOn: 'assembleDebug') {
@@ -64,7 +65,7 @@ task findbugs(type: FindBugs, dependsOn: 'assembleDebug') {
     description 'Run findbugs'
     group 'verification'
 
-    classes = fileTree('build/intermediates/classes/debug/')
+    classes = fileTree('build/intermediates/javac/debug/compileDebugJavaWithJavac/classes')
     source = fileTree('src/main/java')
     classpath = files()
 

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

@@ -12,4 +12,4 @@ public class ApplicationTest extends ApplicationTestCase<Application>
     {
         super(Application.class);
     }
-}
+}

app/src/main/AndroidManifest.xml

@@ -17,7 +17,8 @@
         android:required="false" />
 
     <application
-        android:allowBackup="false"
+        android:name=".LoyaltyCardLockerApplication"
+        android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
@@ -32,6 +33,16 @@
                 <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"
@@ -41,33 +52,36 @@
         <activity
             android:name=".LoyaltyCardEditActivity"
             android:theme="@style/AppTheme.NoActionBar"
-            android:configChanges="orientation|screenSize"
             android:windowSoftInputMode="stateHidden"
-            android:exported="true"/>
+            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=".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"
-            android:configChanges="orientation|screenSize"/>
+            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"/>
@@ -75,7 +89,7 @@
             </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 +1,125 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.text.InputType;
+import android.text.method.LinkMovementMethod;
+import android.text.util.Linkify;
+import android.util.Log;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.common.collect.ImmutableMap;
+
+import org.w3c.dom.Text;
+
+import java.util.Calendar;
+import java.util.Map;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AlertDialog;
+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("VNTNumberPickerPreference", "https://github.com/vanniktech/VNTNumberPickerPreference")
+                .build();
+
+        final Map<String, String> USED_ASSETS = ImmutableMap.of
+                (
+                        "Save by Bernar Novalyi", "https://thenounproject.com/term/save/716011"
+                );
+
+        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;
@@ -20,7 +21,7 @@ import java.lang.ref.WeakReference;
  */
 class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
 {
-    private static final String TAG = "LoyaltyCardLocker";
+    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.
@@ -28,16 +29,18 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
     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;
@@ -58,6 +61,11 @@ 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)
@@ -90,6 +98,11 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
 
     public Bitmap doInBackground(Void... params)
     {
+        if (cardId.isEmpty())
+        {
+            return null;
+        }
+
         MultiFormatWriter writer = new MultiFormatWriter();
         BitMatrix bitMatrix;
         try
@@ -149,6 +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;
     }
@@ -164,16 +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

@@ -5,17 +5,19 @@ 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 +36,7 @@ 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 +60,7 @@ 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
@@ -75,18 +77,18 @@ 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 = findViewById(R.id.cardId);
@@ -113,9 +115,14 @@ public class BarcodeSelectorActivity extends AppCompatActivity
                 // Update barcodes
                 for(String key : barcodeViewMap.keySet())
                 {
-                    ImageView image = 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 +141,22 @@ 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)
@@ -179,7 +201,7 @@ public class BarcodeSelectorActivity extends AppCompatActivity
                         }
 
                         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 +210,7 @@ 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)

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

@@ -18,28 +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.HEADER_COLOR,
-                DBHelper.LoyaltyCardDbIds.HEADER_TEXT_COLOR,
-                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.headerColor,
-                    card.headerTextColor,
-                    card.barcodeType);
+            printer.printRecord(group._id);
 
             if(Thread.currentThread().isInterrupted())
             {
@@ -47,7 +40,66 @@ 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.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.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 +6,11 @@ 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.util.List;
 
 /**
  * Class for importing a database from CSV (Comma Separate Values)
@@ -19,6 +22,34 @@ 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));
+        }
+    }
+
+    public void parseV1(DBHelper db, BufferedReader input) throws IOException, FormatException, InterruptedException
     {
         final CSVParser parser = new CSVParser(input, CSVFormat.RFC4180.withHeader());
 
@@ -51,6 +82,116 @@ 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();
+                }
+            }
+
+            groupParser.close();
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        }
+    }
+
+    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();
+                }
+            }
+
+            cardParser.close();
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        }
+    }
+
+    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();
+                }
+            }
+
+            cardGroupParser.close();
+        } catch (IllegalArgumentException | IllegalStateException e) {
+            throw new FormatException("Issue parsing CSV data", e);
+        }
+    }
+
     /**
      * 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
@@ -131,21 +272,49 @@ public class CsvDatabaseImporter implements DatabaseImporter
         }
 
         String barcodeType = extractString(DBHelper.LoyaltyCardDbIds.BARCODE_TYPE, record, "");
-        if(barcodeType.isEmpty())
-        {
-            throw new FormatException("No barcode type listed, but is required");
-        }
 
         Integer headerColor = null;
-        Integer headerTextColor = null;
 
-        if(record.isMapped(DBHelper.LoyaltyCardDbIds.HEADER_COLOR) &&
-           record.isMapped(DBHelper.LoyaltyCardDbIds.HEADER_TEXT_COLOR))
+        if(record.isMapped(DBHelper.LoyaltyCardDbIds.HEADER_COLOR))
         {
             headerColor = extractInt(DBHelper.LoyaltyCardDbIds.HEADER_COLOR, record, true);
-            headerTextColor = extractInt(DBHelper.LoyaltyCardDbIds.HEADER_TEXT_COLOR, record, true);
         }
 
-        helper.insertLoyaltyCard(database, id, store, note, cardId, barcodeType, headerColor, headerTextColor);
+        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, 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

@@ -1,17 +1,27 @@
 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.SQLiteOpenHelper;
+import android.graphics.Color;
+
+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 = 3;
+    public static final int DATABASE_VERSION = 6;
+
+    static class LoyaltyCardDbGroups
+    {
+        public static final String TABLE = "groups";
+        public static final String ID = "_id";
+        public static final String ORDER = "orderId";
+    }
 
     static class LoyaltyCardDbIds
     {
@@ -23,6 +33,14 @@ public class DBHelper extends SQLiteOpenHelper
         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)
@@ -33,7 +51,12 @@ 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
         db.execSQL("create table " + LoyaltyCardDbIds.TABLE + "(" +
                 LoyaltyCardDbIds.ID + " INTEGER primary key autoincrement," +
                 LoyaltyCardDbIds.STORE + " TEXT not null," +
@@ -41,7 +64,14 @@ public class DBHelper extends SQLiteOpenHelper
                 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
@@ -62,11 +92,37 @@ public class DBHelper extends SQLiteOpenHelper
             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'");
+        }
     }
 
     public long insertLoyaltyCard(final String store, final String note, final String cardId,
                                   final String barcodeType, final Integer headerColor,
-                                  final Integer headerTextColor)
+                                  final int starStatus)
     {
         SQLiteDatabase db = getWritableDatabase();
         ContentValues contentValues = new ContentValues();
@@ -75,15 +131,16 @@ public class DBHelper extends SQLiteOpenHelper
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
         contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
-        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, headerTextColor);
+        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,
+    public boolean insertLoyaltyCard(final SQLiteDatabase db, final int id, final String store,
+                                     final String note, final String cardId,
                                      final String barcodeType, final Integer headerColor,
-                                     final Integer headerTextColor)
+                                     final int starStatus)
     {
         ContentValues contentValues = new ContentValues();
         contentValues.put(LoyaltyCardDbIds.ID, id);
@@ -92,15 +149,15 @@ public class DBHelper extends SQLiteOpenHelper
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
         contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
-        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, headerTextColor);
+        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 Integer headerColor, final Integer headerTextColor)
+                                     final Integer headerColor)
     {
         SQLiteDatabase db = getWritableDatabase();
         ContentValues contentValues = new ContentValues();
@@ -109,7 +166,18 @@ public class DBHelper extends SQLiteOpenHelper
         contentValues.put(LoyaltyCardDbIds.CARD_ID, cardId);
         contentValues.put(LoyaltyCardDbIds.BARCODE_TYPE, barcodeType);
         contentValues.put(LoyaltyCardDbIds.HEADER_COLOR, headerColor);
-        contentValues.put(LoyaltyCardDbIds.HEADER_TEXT_COLOR, headerTextColor);
+        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)});
@@ -127,6 +195,7 @@ public class DBHelper extends SQLiteOpenHelper
         if(data.getCount() == 1)
         {
             data.moveToFirst();
+
             card = LoyaltyCard.toLoyaltyCard(data);
         }
 
@@ -135,27 +204,352 @@ 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()) {
+            return groups;
+        }
+
+        groups.add(Group.toGroup(data));
+
+        while (data.moveToNext()) {
+            groups.add(Group.toGroup(data));
+        }
+
+        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()) {
+            return groups;
+        }
+
+        groups.add(Group.toGroup(data));
+
+        while (data.moveToNext()) {
+            groups.add(Group.toGroup(data));
+        }
+
+        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;
+
+        SQLiteDatabase db = getWritableDatabase();
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(LoyaltyCardDbGroups.ID, newName);
+        try {
+            int rowsUpdated = db.update(LoyaltyCardDbGroups.TABLE, contentValues,
+                    LoyaltyCardDbGroups.ID + "=?",
+                    new String[]{groupName});
+            return (rowsUpdated == 1);
+        } catch (android.database.sqlite.SQLiteConstraintException _e) {
+            return false;
+        }
+    }
+
+    public boolean deleteGroup(final String groupName)
+    {
+        SQLiteDatabase db = getWritableDatabase();
+        // Delete group
+        int rowsDeleted = 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});
+
+        return (rowsDeleted == 1);
+    }
+
+    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

@@ -7,19 +7,17 @@ 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;
@@ -29,21 +27,21 @@ 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.io.OutputStream;
 import java.util.List;
 
 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)
     {
@@ -71,6 +69,11 @@ 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 = findViewById(R.id.exportButton);
         exportButton.setOnClickListener(new View.OnClickListener()
@@ -78,13 +81,14 @@ public class ImportExportActivity extends AppCompatActivity
             @Override
             public void onClick(View v)
             {
-                startExport();
+                chooseFileWithIntent(intentCreateDocumentAction, CHOOSE_EXPORT_LOCATION);
             }
         });
 
-
-        // Check that there is an activity that can bring up a file chooser
-        final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
+        // Check that there is a file manager available
+        final Intent intentGetContentAction = new Intent(Intent.ACTION_GET_CONTENT);
+        intentGetContentAction.addCategory(Intent.CATEGORY_OPENABLE);
+        intentGetContentAction.setType("*/*");
 
         Button importFilesystem = findViewById(R.id.importOptionFilesystemButton);
         importFilesystem.setOnClickListener(new View.OnClickListener()
@@ -92,23 +96,12 @@ public class ImportExportActivity extends AppCompatActivity
             @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 application that can find content
-        final Intent intentGetContentAction = new Intent(Intent.ACTION_GET_CONTENT);
-        intentGetContentAction.addCategory(Intent.CATEGORY_OPENABLE);
-        intentGetContentAction.setType("*/*");
+        // Check that there is an app that data can be imported from
+        final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
 
         Button importApplication = findViewById(R.id.importOptionApplicationButton);
         importApplication.setOnClickListener(new View.OnClickListener()
@@ -116,38 +109,7 @@ public class ImportExportActivity extends AppCompatActivity
             @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 = 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 +130,19 @@ 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();
     }
 
@@ -248,13 +210,9 @@ public class ImportExportActivity extends AppCompatActivity
             builder.setTitle(R.string.importFailedTitle);
         }
 
-        int messageId = success ? R.string.importedFrom : R.string.importFailed;
-        final String template = getResources().getString(messageId);
+        int messageId = success ? R.string.importSuccessful : R.string.importFailed;
+        final String message = getResources().getString(messageId);
 
-        // Get the filename of the file being imported
-        String filename = path.toString();
-
-        final String message = String.format(template, filename);
         builder.setMessage(message);
         builder.setNeutralButton(R.string.ok, new DialogInterface.OnClickListener()
         {
@@ -268,7 +226,7 @@ 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);
 
@@ -281,10 +239,9 @@ 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()
         {
@@ -304,9 +261,8 @@ 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
@@ -323,39 +279,15 @@ 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);
             Log.e(TAG, "No activity found to handle intent", e);
         }
     }
@@ -365,7 +297,7 @@ 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;
@@ -380,24 +312,48 @@ public class ImportExportActivity extends AppCompatActivity
 
         try
         {
-            InputStream reader;
-
-            if(uri.getScheme() != null)
+            if (requestCode == CHOOSE_EXPORT_LOCATION)
             {
-                reader = getContentResolver().openInputStream(uri);
+                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
             {
-                reader = new FileInputStream(new File(uri.toString()));
-            }
+                InputStream reader;
+                if(uri.getScheme() != null)
+                {
+                    reader = getContentResolver().openInputStream(uri);
+                }
+                else
+                {
+                    reader = new FileInputStream(new File(uri.toString()));
+                }
 
-            Log.e(TAG, "Starting file import with: " + uri.toString());
-            startImport(reader, uri);
+                Log.e(TAG, "Starting file export with: " + uri.toString());
+                startImport(reader, uri);
+            }
         }
         catch(FileNotFoundException e)
         {
-            Log.e(TAG, "Failed to import file: " + uri.toString(), e);
-            onImportComplete(false, uri);
+            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 +1,95 @@
+package protect.card_locker;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import java.io.InvalidObjectException;
+
+public class ImportURIHelper {
+    private static final String STORE = DBHelper.LoyaltyCardDbIds.STORE;
+    private static final String NOTE = DBHelper.LoyaltyCardDbIds.NOTE;
+    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
+            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 unparsedHeaderColor = uri.getQueryParameter(HEADER_COLOR);
+            if(unparsedHeaderColor != null)
+            {
+                headerColor = Integer.parseInt(unparsedHeaderColor);
+            }
+
+            return new LoyaltyCard(-1, store, note, 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(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/LoyaltyCard.java

@@ -1,7 +1,8 @@
 package protect.card_locker;
 
 import android.database.Cursor;
-import android.support.annotation.Nullable;
+
+import androidx.annotation.Nullable;
 
 public class LoyaltyCard
 {
@@ -17,8 +18,11 @@ public class LoyaltyCard
     @Nullable
     public final Integer headerTextColor;
 
+    public final int starStatus;
+
     public LoyaltyCard(final int id, final String store, final String note, final String cardId,
-                       final String barcodeType, final Integer headerColor, final Integer headerTextColor)
+                       final String barcodeType, final Integer headerColor, final Integer headerTextColor,
+                       final int starStatus)
     {
         this.id = id;
         this.store = store;
@@ -27,6 +31,7 @@ public class LoyaltyCard
         this.barcodeType = barcodeType;
         this.headerColor = headerColor;
         this.headerTextColor = headerTextColor;
+        this.starStatus = starStatus;
     }
 
     public static LoyaltyCard toLoyaltyCard(Cursor cursor)
@@ -36,6 +41,8 @@ public class LoyaltyCard
         String note = cursor.getString(cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.NOTE));
         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));
+
 
         int headerColorColumn = cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.HEADER_COLOR);
         int headerTextColorColumn = cursor.getColumnIndexOrThrow(DBHelper.LoyaltyCardDbIds.HEADER_TEXT_COLOR);
@@ -53,6 +60,6 @@ public class LoyaltyCard
             headerTextColor = cursor.getInt(headerTextColorColumn);
         }
 
-        return new LoyaltyCard(id, store, note, cardId, barcodeType, headerColor, headerTextColor);
+        return new LoyaltyCard(id, store, note, cardId, barcodeType, headerColor, headerTextColor, starred);
     }
 }

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

@@ -2,23 +2,27 @@ package protect.card_locker;
 
 import android.content.Context;
 import android.database.Cursor;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
 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 protect.card_locker.preferences.Settings;
 
 class LoyaltyCardCursorAdapter extends CursorAdapter
 {
     Settings settings;
+    boolean darkModeEnabled;
 
     public LoyaltyCardCursorAdapter(Context context, Cursor cursor)
     {
         super(context, cursor, 0);
         settings = new Settings(context);
+        darkModeEnabled= MainActivity.isDarkModeEnabled(context);
+
     }
 
     // The newView method is used to inflate a new view and return it,
@@ -36,8 +40,14 @@ class LoyaltyCardCursorAdapter extends CursorAdapter
     {
         // Find fields to populate in inflated template
         ImageView thumbnail = view.findViewById(R.id.thumbnail);
-        TextView storeField = (TextView) view.findViewById(R.id.store);
-        TextView noteField = (TextView) view.findViewById(R.id.note);
+        TextView storeField = view.findViewById(R.id.store);
+        TextView noteField = view.findViewById(R.id.note);
+        ImageView star = view.findViewById(R.id.star);
+
+        if(darkModeEnabled)
+        {
+            star.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_ATOP);
+        }
 
         // Extract properties from cursor
         LoyaltyCard loyaltyCard = LoyaltyCard.toLoyaltyCard(cursor);
@@ -47,7 +57,7 @@ class LoyaltyCardCursorAdapter extends CursorAdapter
 
         storeField.setTextSize(settings.getCardTitleListFontSize());
 
-        if(loyaltyCard.note.isEmpty() == false)
+        if(!loyaltyCard.note.isEmpty())
         {
             noteField.setVisibility(View.VISIBLE);
             noteField.setText(loyaltyCard.note);
@@ -58,13 +68,9 @@ class LoyaltyCardCursorAdapter extends CursorAdapter
             noteField.setVisibility(View.GONE);
         }
 
-        int tileLetterFontSize = context.getResources().getDimensionPixelSize(R.dimen.tileLetterFontSize);
-        int pixelSize = context.getResources().getDimensionPixelSize(R.dimen.cardThumbnailSize);
+        if (loyaltyCard.starStatus!=0) star.setVisibility(View.VISIBLE);
+            else star.setVisibility(View.GONE);
 
-        Integer letterBackgroundColor = loyaltyCard.headerColor;
-        Integer letterTextColor = loyaltyCard.headerTextColor;
-        LetterBitmap letterBitmap = new LetterBitmap(context, loyaltyCard.store, loyaltyCard.store,
-                tileLetterFontSize, pixelSize, pixelSize, letterBackgroundColor, letterTextColor);
-        thumbnail.setImageBitmap(letterBitmap.getLetterTile());
+        thumbnail.setImageBitmap(Utils.generateIcon(context, loyaltyCard.store, loyaltyCard.headerColor).getLetterTile());
     }
 }

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

@@ -5,18 +5,29 @@ 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 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 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 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.EditText;
 import android.widget.ImageView;
@@ -29,35 +40,42 @@ import com.google.zxing.integration.android.IntentResult;
 import com.jaredrummler.android.colorpicker.ColorPickerDialog;
 import com.jaredrummler.android.colorpicker.ColorPickerDialogListener;
 
+import java.io.InvalidObjectException;
+import java.util.ArrayList;
+import java.util.List;
+
 public class LoyaltyCardEditActivity extends AppCompatActivity
 {
-    private static final String TAG = "CardLocker";
-
-    private static final int SELECT_BARCODE_REQUEST = 1;
+    private static final String TAG = "Catima";
 
+    ImageView thumbnail;
     EditText storeFieldEdit;
     EditText noteFieldEdit;
-    ImageView headingColorSample;
-    Button headingColorSelectButton;
-    ImageView headingStoreTextColorSample;
-    Button headingStoreTextColorSelectButton;
+    ChipGroup groupsChips;
+    View cardAndBarcodeLayout;
     TextView cardIdFieldView;
-    View cardIdDivider;
-    View cardIdTableRow;
-    TextView barcodeTypeField;
+    View barcodeTypeView;
+    AutoCompleteTextView barcodeTypeField;
     ImageView barcodeImage;
     View barcodeImageLayout;
     View barcodeCaptureLayout;
 
-    Button captureButton;
     Button enterButton;
 
     int loyaltyCardId;
     boolean updateLoyaltyCard;
+    String barcodeType;
+    String cardId;
+
+    Uri importLoyaltyCardUri = null;
     Integer headingColorValue = null;
-    Integer headingStoreTextColorValue = null;
 
     DBHelper db;
+    ImportURIHelper importUriHelper;
+
+    boolean hasChanged = false;
+    boolean initDone = false;
+    AlertDialog confirmExitDialog = null;
 
     private void extractIntentFields(Intent intent)
     {
@@ -65,6 +83,11 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
         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));
     }
@@ -86,28 +109,87 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
         extractIntentFields(getIntent());
 
         db = new DBHelper(this);
+        importUriHelper = new ImportURIHelper(this);
 
+        thumbnail = findViewById(R.id.thumbnail);
         storeFieldEdit = findViewById(R.id.storeNameEdit);
         noteFieldEdit = findViewById(R.id.noteEdit);
-        headingColorSample = findViewById(R.id.headingColorSample);
-        headingColorSelectButton = findViewById(R.id.headingColorSelectButton);
-        headingStoreTextColorSample = findViewById(R.id.headingStoreTextColorSample);
-        headingStoreTextColorSelectButton = findViewById(R.id.headingStoreTextColorSelectButton);
+        groupsChips = findViewById(R.id.groupChips);
+        cardAndBarcodeLayout = findViewById(R.id.cardAndBarcodeLayout);
         cardIdFieldView = findViewById(R.id.cardIdView);
-        cardIdDivider = findViewById(R.id.cardIdDivider);
-        cardIdTableRow = findViewById(R.id.cardIdTableRow);
-        barcodeTypeField = findViewById(R.id.barcodeType);
+        barcodeTypeView = findViewById(R.id.barcodeTypeView);
+        barcodeTypeField = findViewById(R.id.barcodeTypeField);
         barcodeImage = findViewById(R.id.barcode);
         barcodeImageLayout = findViewById(R.id.barcodeLayout);
         barcodeCaptureLayout = findViewById(R.id.barcodeCaptureLayout);
 
-        captureButton = findViewById(R.id.captureButton);
         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) { }
+        });
+
+        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) { }
+        });
     }
 
     @Override
     public void onNewIntent(Intent intent)
     {
+        super.onNewIntent(intent);
+
         Log.i(TAG, "Received new intent");
         extractIntentFields(intent);
 
@@ -153,7 +235,7 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
 
             if(barcodeTypeField.getText().length() == 0)
             {
-                barcodeTypeField.setText(loyaltyCard.barcodeType);
+                barcodeTypeField.setText(loyaltyCard.barcodeType.isEmpty() ? getString(R.string.noBarcode) : loyaltyCard.barcodeType);
             }
 
             if(headingColorValue == null)
@@ -163,24 +245,69 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
                 {
                     headingColorValue = LetterBitmap.getDefaultColor(this, loyaltyCard.store);
                 }
-                headingColorSample.setBackgroundColor(headingColorValue);
-            }
-
-            if(headingStoreTextColorValue == null)
-            {
-                headingStoreTextColorValue = loyaltyCard.headerTextColor;
-                if(headingStoreTextColorValue == null)
-                {
-                    headingStoreTextColorValue = Color.WHITE;
-                }
-                headingStoreTextColorSample.setBackgroundColor(headingStoreTextColorValue);
             }
 
             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);
+            cardIdFieldView.setText(importCard.cardId);
+            barcodeTypeField.setText(importCard.barcodeType);
+            headingColorValue = importCard.headerColor;
+        }
         else
         {
             setTitle(R.string.addCardTitle);
+            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(new View.OnTouchListener() {
+                    @Override
+                    public boolean onTouch(View v, MotionEvent event) {
+                        hasChanged = true;
+
+                        return false;
+                    }
+                });
+
+                groupsChips.addView(chip);
+            }
         }
 
         if(headingColorValue == null)
@@ -190,117 +317,110 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
             final int color = (int)(Math.random() * colors.length());
             headingColorValue = colors.getColor(color, Color.BLACK);
             colors.recycle();
-
-            headingColorSample.setBackgroundColor(headingColorValue);
         }
 
-        if(headingStoreTextColorValue == null)
-        {
-            headingStoreTextColorValue = Color.WHITE;
-            headingStoreTextColorSample.setBackgroundColor(headingStoreTextColorValue);
+        thumbnail.setOnClickListener(new ColorSelectListener(headingColorValue));
+
+        if (!initDone) {
+            hasChanged = false;
+            initDone = true;
         }
 
-        headingColorSelectButton.setOnClickListener(new ColorSelectListener(headingColorValue, true));
-        headingStoreTextColorSelectButton.setOnClickListener(new ColorSelectListener(headingStoreTextColorValue, false));
+        // 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();
-            final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
-            final String cardIdString = cardIdFieldView.getText().toString();
 
-            if(barcodeImage.getHeight() == 0)
+            if(formatString.isEmpty() || formatString.equals(getString(R.string.noBarcode)))
             {
-                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();
-                            }
-                        });
+                hideBarcode();
             }
             else
             {
-                Log.d(TAG, "ImageView size known known, creating barcode");
-                new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
-            }
+                final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
+                final String cardIdString = cardIdFieldView.getText().toString();
 
-            barcodeImageLayout.setVisibility(View.VISIBLE);
+                generateBarcode(cardIdString, format);
+            }
         }
 
-        View.OnClickListener captureCallback = new View.OnClickListener()
-        {
+        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(new View.OnClickListener() {
             @Override
-            public void onClick(View v)
-            {
-                IntentIntegrator integrator = new IntentIntegrator(LoyaltyCardEditActivity.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);
+            public void onClick(View v) {
+                doSave();
             }
         });
 
-        if(cardIdFieldView.getText().length() > 0)
-        {
-            cardIdDivider.setVisibility(View.VISIBLE);
-            cardIdTableRow.setVisibility(View.VISIBLE);
-            enterButton.setText(R.string.editCard);
+        generateIcon(storeFieldEdit.getText().toString());
+    }
+
+    @Override
+    public void onBackPressed() {
+        askBeforeQuitIfChanged();
+    }
+
+    private void askBeforeQuitIfChanged() {
+        if (!hasChanged) {
+            finish();
+            return;
         }
-        else
+
+        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)
         {
-            cardIdDivider.setVisibility(View.GONE);
-            cardIdTableRow.setVisibility(View.GONE);
-            enterButton.setText(R.string.enterCard);
+            Utils.createSetBarcodeDialog(LoyaltyCardEditActivity.this, LoyaltyCardEditActivity.this, true, cardIdFieldView.getText().toString());
         }
     }
 
     class ColorSelectListener implements View.OnClickListener
     {
         final int defaultColor;
-        final boolean isBackgroundColor;
 
-        ColorSelectListener(int defaultColor, boolean isBackgroundColor)
+        ColorSelectListener(int defaultColor)
         {
             this.defaultColor = defaultColor;
-            this.isBackgroundColor = isBackgroundColor;
         }
 
         @Override
@@ -312,16 +432,11 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
                 @Override
                 public void onColorSelected(int dialogId, int color)
                 {
-                    if(isBackgroundColor)
-                    {
-                        headingColorSample.setBackgroundColor(color);
-                        headingColorValue = color;
-                    }
-                    else
-                    {
-                        headingStoreTextColorSample.setBackgroundColor(color);
-                        headingStoreTextColorValue = color;
-                    }
+                    hasChanged = true;
+
+                    headingColorValue = color;
+
+                    generateIcon(storeFieldEdit.getText().toString());
                 }
 
                 @Override
@@ -341,28 +456,44 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
         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() || barcodeType.isEmpty())
+        if(cardId.isEmpty())
         {
             Snackbar.make(cardIdFieldView, R.string.noCardIdError, 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)
-        {
-            db.updateLoyaltyCard(loyaltyCardId, store, note, cardId, barcodeType, headingColorValue, headingStoreTextColorValue);
+        {   //update of "starStatus" not necessary, since it cannot be changed in this activity (only in ViewActivity)
+            db.updateLoyaltyCard(loyaltyCardId, store, note, cardId, barcodeType, headingColorValue);
             Log.i(TAG, "Updated " + loyaltyCardId + " to " + cardId);
         }
         else
         {
-            loyaltyCardId = (int)db.insertLoyaltyCard(store, note, cardId, barcodeType, headingColorValue, headingStoreTextColorValue);
+            loyaltyCardId = (int)db.insertLoyaltyCard(store, note, cardId, barcodeType, headingColorValue, 0);
         }
 
+        db.setLoyaltyCardGroups(loyaltyCardId, selectedGroups);
+
         finish();
     }
 
@@ -389,7 +520,7 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
         switch(id)
         {
             case android.R.id.home:
-                finish();
+                askBeforeQuitIfChanged();
                 break;
 
             case R.id.action_delete:
@@ -424,10 +555,6 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
                 dialog.show();
 
                 return true;
-
-            case R.id.action_save:
-                doSave();
-                return true;
         }
 
         return super.onOptionsItemSelected(item);
@@ -436,38 +563,66 @@ public class LoyaltyCardEditActivity extends AppCompatActivity
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent intent)
     {
-        String contents = null;
-        String format = null;
+        super.onActivityResult(requestCode, resultCode, intent);
 
-        IntentResult result =
-                IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
-        if (result != null)
-        {
-            Log.i(TAG, "Received barcode information from capture");
-            contents = result.getContents();
-            format = result.getFormatName();
+        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() {
+                            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, cardId, barcodeFormat).execute();
+                        }
+                    });
+        } else {
+            Log.d(TAG, "ImageView size known known, creating barcode");
+            new BarcodeImageWriterTask(barcodeImage, cardId, barcodeFormat).execute();
         }
 
-        if(requestCode == SELECT_BARCODE_REQUEST && resultCode == Activity.RESULT_OK)
-        {
-            Log.i(TAG, "Received barcode information from capture");
+        showBarcode();
+    }
 
-            contents = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_CONTENTS);
-            format = intent.getStringExtra(BarcodeSelectorActivity.BARCODE_FORMAT);
+    private void generateIcon(String store) {
+        if (headingColorValue == null) {
+            return;
         }
 
-        if(contents != null && contents.isEmpty() == false &&
-                format != null && format.isEmpty() == false)
-        {
-            Log.i(TAG, "Read barcode id: " + contents);
-            Log.i(TAG, "Read format: " + format);
+        thumbnail.setBackgroundColor(headingColorValue);
 
-            TextView cardIdView = findViewById(R.id.cardIdView);
-            cardIdView.setText(contents);
+        LetterBitmap letterBitmap = Utils.generateIcon(this, store, headingColorValue);
 
-            final TextView barcodeTypeField = findViewById(R.id.barcodeType);
-            barcodeTypeField.setText(format);
-            onResume();
+        if (letterBitmap != null) {
+            thumbnail.setImageBitmap(letterBitmap.getLetterTile());
+        } else {
+            thumbnail.setImageBitmap(null);
         }
+
+        thumbnail.setMinimumWidth(thumbnail.getHeight());
     }
 }

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

@@ -1,20 +1,25 @@
 package protect.card_locker;
 
-
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.graphics.Color;
+import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v4.widget.TextViewCompat;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+
+import androidx.constraintlayout.widget.ConstraintLayout;
+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.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;
@@ -22,14 +27,14 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.zxing.BarcodeFormat;
 
 import protect.card_locker.preferences.Settings;
 
-
 public class LoyaltyCardViewActivity extends AppCompatActivity
 {
-    private static final String TAG = "CardLocker";
+    private static final String TAG = "Catima";
 
     TextView cardIdFieldView;
     TextView noteView;
@@ -38,10 +43,20 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
     ImageView barcodeImage;
     View collapsingToolbarLayout;
     int loyaltyCardId;
+    LoyaltyCard loyaltyCard;
     boolean rotationEnabled;
     DBHelper db;
+    ImportURIHelper importURIHelper;
     Settings settings;
 
+    String cardIdString;
+    BarcodeFormat format;
+
+    boolean starred;
+    boolean backgroundNeedsDarkIcons;
+    boolean barcodeIsFullscreen = false;
+    ViewGroup.LayoutParams barcodeImageState;
+
     private void extractIntentFields(Intent intent)
     {
         final Bundle b = intent.getExtras();
@@ -49,6 +64,22 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         Log.d(TAG, "View activity: id=" + loyaltyCardId);
     }
 
+    private Drawable getIcon(int icon, boolean dark)
+    {
+        Drawable unwrappedIcon = AppCompatResources.getDrawable(this, icon);
+        Drawable wrappedIcon = DrawableCompat.wrap(unwrappedIcon);
+        if(dark)
+        {
+            DrawableCompat.setTint(wrappedIcon, Color.BLACK);
+        }
+        else
+        {
+            DrawableCompat.setTintList(wrappedIcon, null);
+        }
+
+        return wrappedIcon;
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState)
     {
@@ -69,6 +100,7 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         }
 
         db = new DBHelper(this);
+        importURIHelper = new ImportURIHelper(this);
 
         cardIdFieldView = findViewById(R.id.cardIdView);
         noteView = findViewById(R.id.noteView);
@@ -76,11 +108,30 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         storeName = findViewById(R.id.storeName);
         barcodeImage = findViewById(R.id.barcode);
         collapsingToolbarLayout = findViewById(R.id.collapsingToolbarLayout);
+
+        rotationEnabled = true;
+
+        // Allow making barcode fullscreen on tap
+        barcodeImage.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                if(barcodeIsFullscreen)
+                {
+                    setFullscreen(false);
+                }
+                else
+                {
+                    setFullscreen(true);
+                }
+            }
+        });
     }
 
     @Override
     public void onNewIntent(Intent intent)
     {
+        super.onNewIntent(intent);
+
         Log.i(TAG, "Received new intent");
         extractIntentFields(intent);
     }
@@ -92,18 +143,27 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
 
         Log.i(TAG, "To view card: " + loyaltyCardId);
 
+        if(barcodeIsFullscreen)
+        {
+            // Completely reset state
+            //
+            // This prevents the barcode from taking up the entire screen
+            // on resume and thus being stretched out of proportion.
+            recreate();
+        }
+
         // 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)
+        if(window != null && settings.useMaxBrightnessDisplayingBarcode())
         {
             WindowManager.LayoutParams attributes = window.getAttributes();
             attributes.screenBrightness = 1F;
             window.setAttributes(attributes);
         }
 
-        final LoyaltyCard loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
+        loyaltyCard = db.getLoyaltyCard(loyaltyCardId);
         if(loyaltyCard == null)
         {
             Log.w(TAG, "Could not lookup loyalty card " + loyaltyCardId);
@@ -113,8 +173,8 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         }
 
         String formatString = loyaltyCard.barcodeType;
-        final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
-        final String cardIdString = loyaltyCard.cardId;
+        format = !formatString.isEmpty() ? BarcodeFormat.valueOf(formatString) : null;
+        cardIdString = loyaltyCard.cardId;
 
         cardIdFieldView.setText(loyaltyCard.cardId);
         TextViewCompat.setAutoSizeTextTypeUniformWithConfiguration(cardIdFieldView,
@@ -137,17 +197,6 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         storeName.setText(loyaltyCard.store);
         storeName.setTextSize(settings.getCardTitleFontSize());
 
-        int textColor;
-        if(loyaltyCard.headerTextColor != null)
-        {
-            textColor = loyaltyCard.headerTextColor;
-        }
-        else
-        {
-            textColor = Color.WHITE;
-        }
-        storeName.setTextColor(textColor);
-
         int backgroundHeaderColor;
         if(loyaltyCard.headerColor != null)
         {
@@ -160,37 +209,95 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
 
         collapsingToolbarLayout.setBackgroundColor(backgroundHeaderColor);
 
-        if(barcodeImage.getHeight() == 0)
+        int textColor;
+        if(Utils.needsDarkForeground(backgroundHeaderColor))
         {
-            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();
-                        }
-                    });
+            textColor = Color.BLACK;
         }
         else
         {
-            Log.d(TAG, "ImageView size known known, creating barcode");
-            new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
+            textColor = Color.WHITE;
+        }
+        storeName.setTextColor(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)
+        {
+            findViewById(R.id.barcode).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()
+                            {
+                                barcodeImage.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+
+                                Log.d(TAG, "ImageView size now known");
+                                new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
+                            }
+                        });
+            }
+            else
+            {
+                Log.d(TAG, "ImageView size known known, creating barcode");
+                new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
+            }
+        }
+        else
+        {
+            findViewById(R.id.barcode).setVisibility(View.GONE);
+        }
+
+        FloatingActionButton editButton = findViewById(R.id.fabEdit);
+        editButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View 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();
+            }
+        });
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (barcodeIsFullscreen)
+        {
+            setFullscreen(false);
+            return;
+        }
+
+        super.onBackPressed();
+        return;
     }
 
     @Override
@@ -198,11 +305,38 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
     {
         getMenuInflater().inflate(R.menu.card_view_menu, menu);
 
-        rotationEnabled = true;
+        // 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)
+        {
+            item.setVisible(false);
+        }
+
+        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)
     {
@@ -214,33 +348,121 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
                 finish();
                 break;
 
-            case R.id.action_edit:
-                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();
+            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_star_unstar:
+                starred = !starred;
+                db.updateLoyaltyCardStarStatus(loyaltyCardId, starred ? 1 : 0);
+                invalidateOptionsMenu();
+                return true;
         }
 
         return super.onOptionsItemSelected(item);
     }
-}
+
+
+    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);
+        }
+    }
+
+    /**
+     * 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 && !barcodeIsFullscreen)
+        {
+            // Save previous barcodeImage state
+            barcodeImageState = barcodeImage.getLayoutParams();
+
+            // Hide actionbar
+            if(actionBar != null)
+            {
+                actionBar.hide();
+            }
+
+            // Hide collapsingToolbar
+            collapsingToolbarLayout.setVisibility(View.GONE);
+
+            // Set Android to fullscreen mode
+            getWindow().getDecorView().setSystemUiVisibility(
+                getWindow().getDecorView().getSystemUiVisibility()
+                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                | View.SYSTEM_UI_FLAG_FULLSCREEN
+            );
+
+            // Make barcode take all space
+            barcodeImage.setLayoutParams(new ConstraintLayout.LayoutParams(
+                ConstraintLayout.LayoutParams.MATCH_PARENT,
+                ConstraintLayout.LayoutParams.MATCH_PARENT
+            ));
+
+            // Move barcode to top
+            barcodeImage.setScaleType(ImageView.ScaleType.FIT_START);
+
+            // Prevent centering
+            barcodeImage.setAdjustViewBounds(false);
+
+            // Set current state
+            barcodeIsFullscreen = true;
+        }
+        else if(!enable && barcodeIsFullscreen)
+        {
+            // Show actionbar
+            if(actionBar != null)
+            {
+                actionBar.show();
+            }
+
+            // Show collapsingToolbar
+            collapsingToolbarLayout.setVisibility(View.VISIBLE);
+
+            // Unset fullscreen mode
+            getWindow().getDecorView().setSystemUiVisibility(
+                getWindow().getDecorView().getSystemUiVisibility()
+                & ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                & ~View.SYSTEM_UI_FLAG_FULLSCREEN
+            );
+
+            // Turn barcode back to normal
+            barcodeImage.setLayoutParams(barcodeImageState);
+
+            // Fix barcode centering
+            barcodeImage.setAdjustViewBounds(true);
+
+            // Set current state
+            barcodeIsFullscreen = false;
+        }
+    }
+}

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

@@ -1,40 +1,48 @@
 package protect.card_locker;
 
+import android.app.AlertDialog;
+import android.app.SearchManager;
 import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.ClipboardManager;
 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.LayoutInflater;
 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 com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentResult;
 
-import com.google.common.collect.ImmutableMap;
-
-import java.util.Calendar;
-import java.util.Map;
-
-import protect.card_locker.intro.IntroActivity;
+import java.util.List;
 import protect.card_locker.preferences.SettingsActivity;
 
-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)
@@ -44,42 +52,193 @@ public class MainActivity extends AppCompatActivity
         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(0);
+
+            if (selectedTab < groupsTabLayout.getTabCount()) {
+                tab = groupsTabLayout.getTabAt(selectedTab);
+            }
+
+            groupsTabLayout.selectTab(tab);
+            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) {
+                Utils.createSetBarcodeDialog(MainActivity.this, MainActivity.this, false, null);
+            }
+        });
+    }
+
+    @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)
     {
+        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);
 
@@ -101,11 +260,40 @@ public class MainActivity extends AppCompatActivity
 
                 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)
     {
@@ -126,7 +314,7 @@ public class MainActivity extends AppCompatActivity
         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 +323,12 @@ 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 +336,42 @@ 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);
+
+                    updateLoyaltyCardList(newText, groupsTabLayout.getTabCount() > 0 ? groupsTabLayout.getTabAt(groupsTabLayout.getSelectedTabPosition()).getTag() : null);
+                    return true;
+                }
+            });
+        }
+
         return super.onCreateOptionsMenu(menu);
     }
 
@@ -151,131 +380,111 @@ 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(), LoyaltyCardEditActivity.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_settings)
         {
             Intent i = new Intent(getApplicationContext(), SettingsActivity.class);
-            startActivity(i);
-            return true;
-        }
-
-        if(id == R.id.action_intro)
-        {
-            startIntro();
+            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 = 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("AppIntro", "https://github.com/apl-devs/AppIntro")
-            .put("Color Picker", "https://github.com/jaredrummler/ColorPicker")
-            .put("VNTNumberPickerPreference", "https://github.com/vanniktech/VNTNumberPickerPreference")
-            .build();
-
-        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 +1,254 @@
+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.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 AlertDialog newGroupDialog;
+    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);
+        }
+
+        newGroupDialog = createNewGroupDialog();
+
+        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) {
+                newGroupDialog.show();
+            }
+        });
+    }
+
+    @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();
+    }
+
+    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 AlertDialog createNewGroupDialog() {
+        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();
+
+        return dialog;
+    }
+
+    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

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

@@ -0,0 +1,138 @@
+package protect.card_locker;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.graphics.Color;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+
+import com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentResult;
+
+import androidx.core.graphics.ColorUtils;
+
+public class Utils {
+    private static final String TAG = "Catima";
+
+    // Barcode config dialog
+    private static AlertDialog setBarcodeDialog;
+
+    // Activity request codes
+    public static final int MAIN_REQUEST = 1;
+    public static final int SELECT_BARCODE_REQUEST = 2;
+
+    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 void startCameraBarcodeScan(Context context, Activity activity) {
+        IntentIntegrator integrator = new IntentIntegrator(activity);
+        integrator.setDesiredBarcodeFormats(BarcodeSelectorActivity.SUPPORTED_BARCODE_TYPES);
+
+        String prompt = context.getResources().getString(R.string.scanCardBarcode);
+        integrator.setPrompt(prompt);
+        integrator.setBeepEnabled(false);
+        integrator.initiateScan();
+    }
+
+    static public void createSetBarcodeDialog(final Context context, final Activity activity, boolean isUpdate, final String initialCardId) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        // Get the layout inflater
+        LayoutInflater inflater = activity.getLayoutInflater();
+
+        // Inflate and set the layout for the dialog
+        // Pass null as the parent view because its going in the dialog layout
+        builder.setView(inflater.inflate(R.layout.dialog_create, null));
+
+        if (isUpdate) {
+            builder.setTitle(context.getString(R.string.editCardTitle));
+        } else {
+            builder.setTitle(context.getString(R.string.addCardTitle));
+        }
+
+        builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                setBarcodeDialog.cancel();
+            }
+        });
+        setBarcodeDialog = builder.create();
+        setBarcodeDialog.show();
+
+        View addFromCamera = setBarcodeDialog.getWindow().findViewById(R.id.add_from_camera);
+        View addManually = setBarcodeDialog.getWindow().findViewById(R.id.add_manually);
+
+        addFromCamera.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Utils.startCameraBarcodeScan(context, activity);
+
+                setBarcodeDialog.hide();
+            }
+        });
+
+        addManually.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent i = new Intent(context, BarcodeSelectorActivity.class);
+                if (initialCardId != null) {
+                    final Bundle b = new Bundle();
+                    b.putString("initialCardId", initialCardId);
+                    i.putExtras(b);
+                }
+                activity.startActivityForResult(i, Utils.SELECT_BARCODE_REQUEST);
+
+                setBarcodeDialog.hide();
+            }
+        });
+    }
+
+    static public BarcodeValues parseSetBarcodeActivityResult(int requestCode, int resultCode, Intent intent) {
+        String contents = null;
+        String format = null;
+
+        IntentResult result =
+                IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
+        if (result != null)
+        {
+            Log.i(TAG, "Received barcode information from capture");
+            contents = result.getContents();
+            format = result.getFormatName();
+        }
+
+        if(requestCode == Utils.SELECT_BARCODE_REQUEST && resultCode == Activity.RESULT_OK)
+        {
+            Log.i(TAG, "Received barcode information from typing it");
+
+            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);
+    }
+}

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

@@ -3,8 +3,9 @@ package protect.card_locker.preferences;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.support.annotation.IntegerRes;
-import android.support.annotation.StringRes;
+import androidx.annotation.IntegerRes;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatDelegate;
 
 import protect.card_locker.R;
 
@@ -29,11 +30,37 @@ public class Settings
         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);
@@ -58,4 +85,14 @@ public class Settings
     {
         return getInt(R.string.settings_key_card_note_font_size, R.integer.settings_card_note_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

@@ -1,9 +1,11 @@
 package protect.card_locker.preferences;
 
 import android.os.Bundle;
+import android.preference.Preference;
 import android.preference.PreferenceFragment;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
 import android.view.MenuItem;
 
 import protect.card_locker.R;
@@ -44,12 +46,35 @@ public class SettingsActivity extends AppCompatActivity
     public static class SettingsFragment extends PreferenceFragment
     {
         @Override
-        public void onCreate(Bundle savedInstanceState)
+        public void onCreate(final Bundle savedInstanceState)
         {
             super.onCreate(savedInstanceState);
 
             // Load the preferences from an XML resource
             addPreferencesFromResource(R.xml.preferences);
+
+            findPreference(getResources().getString(R.string.settings_key_theme)).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);
+                    }
+
+                    getActivity().recreate();
+                    return true;
+                }
+            });
         }
     }
 }