Merge pull request #142 from brarcher/widget

Add widget for directly opening specific card

app/src/main/AndroidManifest.xml

@@ -53,6 +53,20 @@
             android:label=""
             android:configChanges="orientation|screenSize"
             android:theme="@style/AppTheme.NoActionBar"/>
+
+        <receiver android:name=".appwidget.CardAppWidgetProvider">
+            <meta-data android:name="android.appwidget.provider"
+                       android:resource="@xml/appwidget_provider" />
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+        </receiver>
+
+        <activity android:name=".appwidget.CardAppWidgetConfigure">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
     </application>
 
 </manifest>

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

@@ -8,7 +8,7 @@ import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 import android.widget.TextView;
 
-class LoyaltyCardCursorAdapter extends CursorAdapter
+public class LoyaltyCardCursorAdapter extends CursorAdapter
 {
     public LoyaltyCardCursorAdapter(Context context, Cursor cursor)
     {

app/src/main/java/protect/card_locker/appwidget/CardAppWidgetConfigure.java

@@ -0,0 +1,130 @@
+package protect.card_locker.appwidget;
+
+import android.appwidget.AppWidgetManager;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ListView;
+
+import protect.card_locker.DBHelper;
+import protect.card_locker.LoyaltyCard;
+import protect.card_locker.LoyaltyCardCursorAdapter;
+import protect.card_locker.R;
+
+/**
+ * The configuration screen for the CardAppWidgetProvider widget.
+ */
+public class CardAppWidgetConfigure extends AppCompatActivity
+{
+    static final String TAG = "LoyaltyCardLocker";
+
+    private static final String PREFS_NAME
+            = "protect.card_locker.appwidget.CardAppWidgetProvider";
+    private static final String PREF_PREFIX_KEY = "prefix_";
+
+    int appWidgetId_ = AppWidgetManager.INVALID_APPWIDGET_ID;
+
+    @Override
+    public void onCreate(Bundle bundle)
+    {
+        super.onCreate(bundle);
+
+        // Set the result to CANCELED.  This will cause the widget host to cancel
+        // out of the widget placement if they press the back button.
+        setResult(RESULT_CANCELED);
+
+        setContentView(R.layout.main_activity);
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        toolbar.setVisibility(View.GONE);
+
+        setTitle(R.string.selectCardTitle);
+
+        // Find the widget id from the intent.
+        Intent intent = getIntent();
+        Bundle extras = intent.getExtras();
+        if (extras != null)
+        {
+            appWidgetId_ = extras.getInt(
+                    AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
+        }
+
+        // If they gave us an intent without the widget id, just bail.
+        if (appWidgetId_ == AppWidgetManager.INVALID_APPWIDGET_ID)
+        {
+            finish();
+        }
+
+        final DBHelper db = new DBHelper(this);
+
+        // If there are no cards, bail
+        if(db.getLoyaltyCardCount() == 0)
+        {
+            finish();
+        }
+
+        final ListView cardList = (ListView) findViewById(R.id.list);
+        cardList.setVisibility(View.VISIBLE);
+
+        Cursor cardCursor = db.getLoyaltyCardCursor();
+
+        final LoyaltyCardCursorAdapter adapter = new LoyaltyCardCursorAdapter(this, cardCursor);
+        cardList.setAdapter(adapter);
+
+        cardList.setOnItemClickListener(new AdapterView.OnItemClickListener()
+        {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id)
+            {
+                Context context = CardAppWidgetConfigure.this;
+                Cursor selected = (Cursor) parent.getItemAtPosition(position);
+                LoyaltyCard loyaltyCard = LoyaltyCard.toLoyaltyCard(selected);
+
+                Log.d(TAG, "Saving card " + loyaltyCard.store + "," + loyaltyCard.id + " at " + appWidgetId_);
+
+                // Save the association of the card to the widget
+                saveIdPref(context, appWidgetId_, loyaltyCard.id);
+
+                // Push widget update to surface with newly set association
+                AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
+                CardAppWidgetProvider.updateAppWidget(context, appWidgetManager, appWidgetId_);
+
+                // Make sure we pass back the original appWidgetId
+                Intent resultValue = new Intent();
+                resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId_);
+                setResult(RESULT_OK, resultValue);
+                finish();
+            }
+        });
+    }
+
+    // Write the prefix to the SharedPreferences object for this widget
+    static void saveIdPref(Context context, int appWidgetId, int id)
+    {
+        SharedPreferences.Editor prefs = context.getSharedPreferences(PREFS_NAME, 0).edit();
+        prefs.putInt(PREF_PREFIX_KEY + appWidgetId, id);
+        prefs.commit();
+    }
+
+    // Read the prefix from the SharedPreferences object for this widget.
+    // If there is no preference saved, get the default from a resource
+    static Integer loadIdPref(Context context, int appWidgetId)
+    {
+        SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0);
+        int id = prefs.getInt(PREF_PREFIX_KEY + appWidgetId, -1);
+        if(id >= 0)
+        {
+            return id;
+        }
+        else
+        {
+            return null;
+        }
+    }
+}

app/src/main/java/protect/card_locker/appwidget/CardAppWidgetProvider.java

@@ -0,0 +1,79 @@
+package protect.card_locker.appwidget;
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.Context;
+import android.content.Intent;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.RemoteViews;
+
+import protect.card_locker.DBHelper;
+import protect.card_locker.LoyaltyCard;
+import protect.card_locker.LoyaltyCardViewActivity;
+import protect.card_locker.R;
+
+public class CardAppWidgetProvider extends AppWidgetProvider
+{
+    private static final String TAG = "LoyaltyCardLocker";
+
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
+    {
+        Log.d(TAG, "CardAppWidgetProvider onUpdate");
+        // For each widget that needs an update, get the text that we should display:
+        //   - Create a RemoteViews object for it
+        //   - Set the text in the RemoteViews object
+        //   - Tell the AppWidgetManager to show that views object for the widget.
+        for (int appWidgetId : appWidgetIds)
+        {
+            updateAppWidget(context, appWidgetManager, appWidgetId);
+        }
+    }
+
+    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId)
+    {
+        Log.d(TAG, "updateAppWidget appWidgetId=" + appWidgetId);
+
+        LoyaltyCard card = null;
+        DBHelper db = new DBHelper(context);
+
+        Integer id = CardAppWidgetConfigure.loadIdPref(context, appWidgetId);
+        if(id != null)
+        {
+            Log.d(TAG, "updateAppWidget Retrieved id " + id);
+            card = db.getLoyaltyCard(id);
+        }
+
+        if(card != null)
+        {
+            Log.d(TAG, "updateAppWidget Updating widget  " + appWidgetId + " to load " + card.store);
+
+            // Construct the RemoteViews object.  It takes the package name (in our case, it's our
+            // package, but it needs this because on the other side it's the widget host inflating
+            // the layout from our package).
+            RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider);
+            views.setTextViewText(R.id.title, card.store);
+
+            // Launch the view activity when clicked
+            Intent intent = new Intent(context, LoyaltyCardViewActivity.class);
+            Bundle extras = new Bundle();
+            extras.putInt("id", id);
+            extras.putBoolean("view", true);
+            intent.putExtras(extras);
+            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
+            views.setOnClickPendingIntent(R.id.widget, pendingIntent);
+
+            // Tell the widget manager
+            appWidgetManager.updateAppWidget(appWidgetId, views);
+        }
+        else
+        {
+            Log.d(TAG, "updateAppWidget, no card ID associated with widget " + appWidgetId
+                + ", ignoring update");
+        }
+    }
+}

app/src/main/res/layout/appwidget_provider.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:id="@+id/widget"
+                android:layout_width="60.0dip"
+                android:layout_height="70.0dip">
+    <ImageView
+        android:id="@+id/icon"
+        android:layout_gravity="start"
+        android:layout_centerHorizontal="true"
+        android:layout_width="55.0dip"
+        android:layout_height="55.0dip"
+        android:gravity="center_horizontal"
+        android:src="@mipmap/ic_launcher" />
+
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/icon"
+        android:gravity="center_horizontal"
+        android:ellipsize="end"
+        android:textAppearance="@style/TextAppearance.AppCompat.Caption"/>
+</RelativeLayout>

app/src/main/res/values/strings.xml

@@ -31,6 +31,7 @@
     <string name="addCardTitle">Add Loyalty Card</string>
     <string name="viewCardTitle">View Loyalty Card</string>
     <string name="scanCardBarcode">Scan Card\'s Barcode</string>
+    <string name="selectCardTitle">Select Card</string>
 
     <string name="barcodeImageDescription">Image of card\'s barcode</string>
 

app/src/main/res/xml/appwidget_provider.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minWidth="60dp"
+                    android:minHeight="30dp"
+                    android:initialLayout="@layout/appwidget_provider"
+                    android:configure="protect.card_locker.appwidget.CardAppWidgetConfigure"
+                    android:resizeMode="horizontal"
+    >
+</appwidget-provider>