[AA] Working GridView for Android Auto

With this commit we have the first functional version
of the AndroidAuto integration.

app/src/main/AndroidManifest.xml

@@ -15,6 +15,12 @@
     <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
     <uses-permission android:name="android.permission.CAMERA" />
 
+    <uses-sdk android:minSdkVersion="32"
+        android:targetSdkVersion="34" />
+
+    <uses-feature
+        android:name="android.software.car.templates_host"/>
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -31,6 +37,9 @@
             android:value="AIzaSyB7C4QCJEBvS7mFa_DeIZdzqe2hddtl-vk" />
         <meta-data android:name="com.google.android.gms.car.application"
             android:resource="@xml/automotive_app_desc"/>
+        <meta-data
+            android:name="androidx.car.app.minCarApiLevel"
+            android:value="1" />
 
         <activity
             android:name=".FlashlightActivity"
@@ -51,7 +60,6 @@
             tools:ignore="LockedOrientationActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
@@ -71,9 +79,8 @@
         <service android:name=".auto.ShareLocationCarAppService"
             android:exported="true">
             <intent-filter>
-                <action android:name="androidx.car.app.action.SERVICE" />
                 <action android:name="androidx.car.app.CarAppService"/>
-                <category android:name="androidx.car.app.category.MESSAGING"/>
+                <category android:name="androidx.intent.category.IOT" />
             </intent-filter>
         </service>
 

app/src/main/java/com/aldo/apps/familyhelpers/ShareLocationActivity.java

@@ -476,6 +476,10 @@ public class ShareLocationActivity extends AppCompatActivity implements OnMapRea
 
     @Override
     public void onMapReady(@NonNull final GoogleMap googleMap) {
+        if (googleMap == null) {
+            Log.w(TAG, "onMapReady: Map null, cannot continue");
+            return;
+        }
         mGmap = googleMap;
         if (mIsNightMode) {
             mGmap.setMapStyle(MapStyleOptions.loadRawResourceStyle(this, R.raw.map_style_night));

app/src/main/java/com/aldo/apps/familyhelpers/auto/ShareLocationCarAppService.java

@@ -7,8 +7,16 @@ import androidx.car.app.CarAppService;
 import androidx.car.app.Session;
 import androidx.car.app.validation.HostValidator;
 
+/**
+ * The {@link CarAppService} extension to be called upon connection.
+ */
 public class ShareLocationCarAppService extends CarAppService {
+
+    /**
+     * Tag for debugging purposes.
+     */
     private static final String TAG = "ShareLocationCarAppServ";
+
     @NonNull
     @Override
     public HostValidator createHostValidator() {
@@ -19,7 +27,13 @@ public class ShareLocationCarAppService extends CarAppService {
     @NonNull
     @Override
     public Session onCreateSession() {
+        try {
             Log.d(TAG, "onCreateSession: ");
             return new ShareLocationSession();
+        } catch (Exception e) {
+            Log.e(TAG, "onCreateSession: ", e);
+            return new ShareLocationSession();
         }
+    }
+
 }

app/src/main/java/com/aldo/apps/familyhelpers/auto/ShareLocationScreen.java

@@ -1,10 +1,5 @@
 package com.aldo.apps.familyhelpers.auto;
 
-import static androidx.core.app.NotificationManagerCompat.IMPORTANCE_DEFAULT;
-
-import static com.aldo.apps.familyhelpers.utils.GlobalConstants.SHARE_LOCATION_CANCEL_ACTION;
-
-import android.app.PendingIntent;
 import android.content.Intent;
 import android.util.Log;
 
@@ -17,136 +12,127 @@ import androidx.car.app.Screen;
 import androidx.car.app.annotations.ExperimentalCarApi;
 import androidx.car.app.model.CarIcon;
 import androidx.car.app.model.GridItem;
+import androidx.car.app.model.GridTemplate;
 import androidx.car.app.model.ItemList;
-import androidx.car.app.model.ListTemplate;
 import androidx.car.app.model.Template;
-import androidx.car.app.notification.CarAppExtender;
-import androidx.car.app.notification.CarNotificationManager;
-import androidx.core.app.NotificationChannelCompat;
-import androidx.core.app.NotificationCompat;
 import androidx.core.graphics.drawable.IconCompat;
 
 import com.aldo.apps.familyhelpers.R;
 import com.aldo.apps.familyhelpers.workers.LocationHelper;
 import com.aldo.apps.familyhelpers.workers.ShareLocationBackgroundWorker;
 
+/**
+ * {@link Screen} implementation to be shown in the Android Auto environment.
+ */
 public class ShareLocationScreen extends Screen {
 
-    private static final String AA_NOTIFICATION_CHANNEL = "ShareLocation_AA";
+    /**
-
+     * Tag for debugging purpose.
-    private static final int AA_NOTIFICATION_ID = 1;
+     */
-
     private static final String TAG = "ShareLocationScreen";
 
+    /**
+     * {@link LocationHelper} instance to observe the current sharing state.
+     */
     private LocationHelper mLocationHelper;
 
-    // Constructor for ShareLocationScreen
+    /**
+     * C'Tor.
+     *
+     * @param carContext The {@link CarContext} this was instantiated in.
+     */
     protected ShareLocationScreen(@NonNull CarContext carContext) {
         super(carContext);
         Log.d(TAG, "ShareLocationScreen() called with: carContext = [" + carContext + "]");
-        mLocationHelper = LocationHelper.getInstance(getCarContext());
     }
 
-
     @ExperimentalCarApi
     @NonNull
     @Override
     public Template onGetTemplate() {
         Log.d(TAG, "onGetTemplate() called");
+        mLocationHelper = LocationHelper.getInstance(getCarContext());
 
         final GridItem startItem = new GridItem.Builder()
                 .setTitle(getString(R.string.android_auto_share_location_start))
                 .setText(getString(R.string.android_auto_share_location_start_desc))
-                .setImage(new CarIcon.Builder(IconCompat.createWithResource(getCarContext(),  R.drawable.ic_start_sharing))
+                .setImage(getIconForResource(R.drawable.ic_start_sharing), GridItem.IMAGE_TYPE_ICON)
-                        .build(), GridItem.IMAGE_TYPE_LARGE)
                 .setOnClickListener(this::startLocationShareService)
                 .build();
 
         final GridItem stopItem = new GridItem.Builder()
                 .setTitle(getString(R.string.android_auto_share_location_stop))
                 .setText(getString(R.string.android_auto_share_location_stop_desc))
-                .setImage(new CarIcon.Builder(IconCompat.createWithResource(getCarContext(),  R.drawable.ic_stop_sharing))
+                .setImage(getIconForResource(R.drawable.ic_stop_sharing), GridItem.IMAGE_TYPE_ICON)
-                        .build(), GridItem.IMAGE_TYPE_LARGE)
                 .setOnClickListener(this::stopLocationSharingService)
                 .build();
 
         final ItemList itemList = new ItemList.Builder()
-                .setNoItemsMessage("No Items yet, something went wrong I guess")
+                .setNoItemsMessage(getString(R.string.android_auto_share_location_no_items_yet))
                 .addItem(startItem)
                 .addItem(stopItem)
                 .build();
 
-        mLocationHelper.getSharingStateSubject().subscribe(this::createNotification, this::handleError);
+        return new GridTemplate.Builder()
-
-        return new ListTemplate.Builder()
                 .setLoading(false)
-                .setTitle("Share Location")
+                .setTitle(getString(R.string.android_auto_share_location_start_desc))
                 .setSingleList(itemList)
                 .build();
     }
 
-    private void createNotification(final Boolean isSharing) {
+    /**
-        Log.d(TAG, "createNotification() called with: isSharing = [" + isSharing + "]");
+     * Helper method to get an Icon from Resources and tint it into the proper color.
-        CarNotificationManager notificationManager = CarNotificationManager.from(getCarContext());
+     *
-        notificationManager.createNotificationChannel(
+     * @param iconId The DrawableId of the icon.
-                new NotificationChannelCompat.Builder(AA_NOTIFICATION_CHANNEL, IMPORTANCE_DEFAULT)
+     *
-                        .build());
+     * @return The CarIcon.
-        final PendingIntent serviceIntent;
+     */
-        @DrawableRes final int iconId;
+    private CarIcon getIconForResource(@DrawableRes final int iconId) {
-        final String title;
+        final IconCompat iconCompat = IconCompat.createWithResource(getCarContext(), iconId);
-        if (isSharing) {
+        iconCompat.setTint(getCarContext().getColor(R.color.md_theme_primary));
-            // Create an intent to start the ShareLocationBackgroundWorker service
+        return new CarIcon.Builder(iconCompat).build();
-            final Intent stopService = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
-            stopService.setAction(SHARE_LOCATION_CANCEL_ACTION);
-            serviceIntent = PendingIntent.getService(getCarContext(), 0, stopService, PendingIntent.FLAG_IMMUTABLE);
-            title = getString(R.string.android_auto_share_location_stop);
-            iconId = R.drawable.ic_stop_sharing;
-        } else {
-            // Create an intent to start the ShareLocationBackgroundWorker service
-            final Intent startServiceIntent = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
-            serviceIntent = PendingIntent.getService(getCarContext(), 0, startServiceIntent, PendingIntent.FLAG_IMMUTABLE);
-            title = getString(R.string.android_auto_share_location_start);
-            iconId = R.drawable.ic_start_sharing;
     }
 
-        final NotificationCompat.Builder carNotification = new NotificationCompat.Builder(getCarContext(), AA_NOTIFICATION_CHANNEL)
+    /**
-                .setContentTitle("Share Location")
+     * Helper method to start the location sharing by starting the {@link ShareLocationBackgroundWorker}.
-                .addAction(iconId, title, serviceIntent)
+     */
-                .extend(new CarAppExtender.Builder()
-                        .build());
-
-        notificationManager.notify(AA_NOTIFICATION_ID, carNotification);
-
-    }
     private void startLocationShareService() {
         Log.d(TAG, "startLocationShareService: ");
         if (mLocationHelper != null && mLocationHelper.isCurrentlySharing()) {
-            CarToast.makeText(getCarContext(), "You already are sharing", CarToast.LENGTH_SHORT).show();
+            CarToast.makeText(getCarContext(), R.string.android_auto_share_location_already_sharing,
+                    CarToast.LENGTH_SHORT).show();
             return;
         }
         // Create an intent to start the ShareLocationBackgroundWorker service
-        final Intent startServiceIntent = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
+        final Intent serviceIntent = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
         // Start the service using the car context
-        getCarContext().startForegroundService(startServiceIntent);
+        getCarContext().startForegroundService(serviceIntent);
     }
 
+    /**
+     * Helper method to stop the location sharing by stopping the {@link ShareLocationBackgroundWorker}.
+     */
     private void stopLocationSharingService() {
         Log.d(TAG, "stopLocationSharingService: ");
         if (mLocationHelper != null && !mLocationHelper.isCurrentlySharing()) {
-            CarToast.makeText(getCarContext(), "You are not sharing", CarToast.LENGTH_SHORT).show();
+            CarToast.makeText(getCarContext(), R.string.android_auto_share_location_not_yet_sharing,
+                    CarToast.LENGTH_SHORT).show();
             return;
         }
         // Create an intent to start the ShareLocationBackgroundWorker service
-        final Intent startServiceIntent = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
+        final Intent serviceIntent = new Intent(getCarContext(), ShareLocationBackgroundWorker.class);
         // Start the service using the car context
-        getCarContext().stopService(startServiceIntent);
+        getCarContext().stopService(serviceIntent);
     }
 
+    /**
+     * Helper method to extract a string resource.
+     *
+     * @param stringId The String resource ID.
+     *
+     * @return The unwrapped string.
+     */
     private String getString(@StringRes final int stringId) {
         return getCarContext().getString(stringId);
     }
-
-    private void handleError(final Throwable error) {
-        Log.e(TAG, "handleErrot: ", error);
-    }
 }

app/src/main/java/com/aldo/apps/familyhelpers/auto/ShareLocationSession.java

@@ -7,7 +7,14 @@ import androidx.annotation.NonNull;
 import androidx.car.app.Screen;
 import androidx.car.app.Session;
 
+/**
+ * The {@link Session} to be started by the CarAppService to show the {@link ShareLocationScreen}.
+ */
 public class ShareLocationSession extends Session {
+
+    /**
+     * Tag for debugging purposes.
+     */
     private static final String TAG = "ShareLocationSession";
 
     @NonNull

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

@@ -63,9 +63,13 @@
     <string name="android_auto_actions_start_sharing">Ja, fang an zu teilen</string>
     <string name="android_auto_actions_stop_sharing">Ja, hör auf zu teilen</string>
     <string name="android_auto_share_location_start">Start</string>
-    <string name="android_auto_share_location_start_desc">Anfangen den Standort zu teilen</string>
+    <string name="android_auto_share_location_start_desc">Standrot teilen</string>
     <string name="android_auto_share_location_stop">Stop</string>
-    <string name="android_auto_share_location_stop_desc">Aufhören den Standort zu teilen</string>
+    <string name="android_auto_share_location_stop_desc">Nicht mehr teilen</string>
     <string name="pref_on_screen_flashlight_custom_color_summary">Wähle eine eigene Farbe für deine Bildschirm-Taschenlampe</string>
     <string name="flashlight_on_screen_custom_color">Eigene Farbe</string>
+    <string name="android_auto_share_location_no_items_yet">Noch keine Einträge, seltsam...</string>
+    <string name="android_auto_share_location_already_sharing">Du teilst deinen Standort schon</string>
+    <string name="android_auto_share_location_not_yet_sharing">Du teilst deinen Standort noch nicht</string>
+
 </resources>

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

@@ -62,10 +62,15 @@
     <string name="android_auto_message_not_sharing">Android Auto start has been detected, do you wanna share your location?</string>
     <string name="android_auto_actions_start_sharing">Yes, start to share</string>
     <string name="android_auto_actions_stop_sharing">Yes, stop sharing</string>
-    <string name="android_auto_share_location_start">Start</string>
+    <string name="android_auto_share_location_start_desc">Share Location</string>
-    <string name="android_auto_share_location_start_desc">Start to share location</string>
     <string name="android_auto_share_location_stop">Stop</string>
-    <string name="android_auto_share_location_stop_desc">Stop to share the location</string>
+    <string name="android_auto_share_location_stop_desc">Stop Sharing</string>
+    <string name="android_auto_share_location_start">Start</string>
     <string name="pref_on_screen_flashlight_custom_color_summary">Choose an own color to be displayed in the on-screen flashlight.</string>
     <string name="flashlight_on_screen_custom_color">Custom Color</string>
+    <string name="android_auto_share_location_no_items_yet">No Items yet, something went wrong</string>
+    <string name="android_auto_share_location_already_sharing">You already share your location</string>
+    <string name="android_auto_share_location_not_yet_sharing">You are not yet sharing your location</string>
+
+
 </resources>

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

@@ -94,8 +94,11 @@
     <string name="android_auto_actions_start_sharing">Yes, start to share</string>
     <string name="android_auto_actions_stop_sharing">Yes, stop sharing</string>
     <string name="android_auto_share_location_start">Start</string>
-    <string name="android_auto_share_location_start_desc">Start to share location</string>
+    <string name="android_auto_share_location_start_desc">Share Location</string>
     <string name="android_auto_share_location_stop">Stop</string>
-    <string name="android_auto_share_location_stop_desc">Stop to share the location</string>
+    <string name="android_auto_share_location_stop_desc">Stop Sharing</string>
+    <string name="android_auto_share_location_no_items_yet">No Items yet, something went wrong</string>
+    <string name="android_auto_share_location_already_sharing">You already share your location</string>
+    <string name="android_auto_share_location_not_yet_sharing">You are not yet sharing your location</string>
 
 </resources>

app/src/main/res/xml/automotive_app_desc.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <automotiveApp>
-    <uses name="notification" />
+    <uses name="template"/>
 </automotiveApp>