First meet with Android Auto

Introduction of Android Auto features and developing apps with Android Auto
(2016.05.28 Android Taipei @ Yahoo!)

Transcript

1. FIRST MEET WITH ANDROID AUTO Johnny Sung 2016.05.28 Android Taipei @ Yahoo! Slides URL: http://goo.gl/EasR9V
2. MOBILE DEVICES DEVELOPER Johnny Sung https://fb.com/j796160836 https://plus.google.com/+JohnnySung http://about.me/j796160836
7. http://www.pioneerelectronics.com/androidauto/
8. FEATURES & LIMITATIONS INTRODUCING ANDROID AUTO
9. http://www.pioneerelectronics.com/androidauto/
10. DEMO
11. http://www.greenbot.com/article/2931099/android-auto-review-the-best-way-to-get-google-maps-in-your-car.html Navigation Tab
12. Phone Tab
13. Notification Tab
14. Music Tab
15. Vehicle info Tab
16. Vehicle info detail
17. ***The Android Auto app is currently available in the following countries: Ecuador France Germany Guatemala India Ireland Italy Mexico New Zealand Panama Argentina Australia Austria Bolivia Brazil Canada Chile Colombia Costa Rica Dominican Republic Paraguay Peru Puerto Rico Russia Spain Switzerland United Kingdom United States Uruguay Venezuela https://www.android.com/auto/
18. SETUP & INSTALLATION
19. EMULATOR SETUP 1. Install Auto Desktop Head Unit emulator from the SDK Manager 2. Install Android Auto app on phone A. Tapping the Android Auto toolbar title 10 times to enable developer mode B. Select Start head unit server from the Android Auto menu.
20. 1. Install Auto Desktop Head Unit emulator from the SDK Manager
21. https://play.google.com/store/apps/details?id=com.google.android.projection.gearhead 2. Install Android Auto app on phone
22. A. enable developer mode B. Select Start head unit server from menu.
23. #!/bin/bash adb forward tcp:5277 tcp:5277 $ANDROID_HOME/extras/google/auto/desktop-head-unit EMULATOR SETUP 3. Connect your phone to computer via USB. 4. Run scripts StartAndroidAutoDesktopHeadUnit.sh https://developer.android.com/training/auto/start/index.html
24. 3. Connect your phone to computer via USB. 4. Run scripts
25. Mac Android phone
26. Emulator Commands ▸ day ▸ night ▸ daynight
27. Day mode Night mode
28. For safety reasons, TOUCHES 4 operation is limited within
29. Limited Operations ▸ 11 items per page ▸ 3 level depth
31. AUDIO APPS MAKING FOR ANDROID AUTO
33. Create MediaBrowserService <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package=“my.package.name">
 <application> <!-- ... --> <meta-data
 android:name="com.google.android.gms.car.application"
 android:resource="@xml/automotive_app_desc"/>
 <service
 android:name=".MyMediaBrowserService"
 android:exported="true">
 <intent-filter>
 <action android:name="android.media.browse.MediaBrowserService"/>
 </intent-filter>
 </service>
 
 </application>
 </manifest> AndroidManifest.xml (1/3)
34. Create MediaBrowserService <?xml version="1.0" encoding="utf-8"?>
 <automotiveApp>
 <uses name="media"/>
 </automotiveApp> automotive_app_desc.xml (2/3)
35. Create MediaBrowserService @TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class MyMediaBrowserService extends MediaBrowserService {
 @Nullable
 @Override
 public BrowserRoot onGetRoot(String packageName, int uid, Bundle root) {
 return new BrowserRoot(Const.MEDIA_ID_ROOT, null);
 }
 
 @Override
 public void onLoadChildren(String parentId, Result<List<MediaBrowser.MediaItem>> result) {
 // ...
 }
 } MyMediaBrowserService.java (3/3)
36. Working with MediaSession public class MyMediaBrowserService extends MediaBrowserService {
 
 private MediaSession mSession;
 
 @Override
 public void onCreate() {
 super.onCreate();
 mSession = new MediaSession(this, "MyMediaBrowserService");
 setSessionToken(mSession.getSessionToken());
 mSession.setCallback(new MediaSessionCallback());
 mSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS |
 MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
 }
 
 @Override
 public void onDestroy() {
 mSession.release();
 }
 
 private final class MediaSessionCallback extends MediaSession.Callback {
 // ...
 }
 } MyMediaBrowserService.java
37. private final class MediaSessionCallback extends MediaSession.Callback {
 @Override
 public void onPlay() {
 }
 @Override
 public void onPause() {
 }
 
 @Override
 public void onStop() {
 }
 
 @Override
 public void onSeekTo(long position) {
 }
 
 @Override
 public void onSkipToNext() {
 }
 
 @Override
 public void onSkipToPrevious() {
 } 
 // ...
 }
38. private final class MediaSessionCallback extends MediaSession.Callback { // ...
 @Override
 public void onPlayFromMediaId(String mediaId, Bundle extras) {
 }
 
 @Override
 public void onSkipToQueueItem(long queueId) {
 }
 
 @Override
 public void onCustomAction(String action, Bundle extras) {
 }
 
 @Override
 public void onPlayFromSearch(final String query, final Bundle extras) {
 }
 }
39. Validate caller package @Override
 public BrowserRoot onGetRoot(String packageName, int uid, Bundle rootHints) {
 LogHelper.d(TAG, "OnGetRoot: clientPackageName=" + packageName,
 "; clientUid=" + uid + " ; rootHints=", rootHints);
 // To ensure you are not allowing any arbitrary app to browse your app's contents, you need to check the origin:
 if (!mPackageValidator.isCallerAllowed(this, packageName, uid)) {
 // If the request comes from an untrusted package, return null.
 LogHelper.w(TAG, "OnGetRoot: IGNORING request from untrusted package "
 + packageName);
 return null;
 }
 
 return new BrowserRoot(Const.MEDIA_ID_ROOT, null);
 } MyMediaBrowserService.java
40. Create Sliding Menus @Override
 public void onLoadChildren(final String pId, final Result<List<MediaItem>> result) {
 List<MediaItem> mediaItems = new ArrayList<>();
 if ("__ROOT__".equals(pId)) {
 mediaItems.add(new MediaItem(
 new MediaDescription.Builder()
 .setMediaId(Const.MEDIA_ID_ITEM1)
 .setTitle("Item 01")
 .setSubtitle("Some descriptions")
 .setIconUri(Uri.parse( "android.resource://my.package.name/drawable/icon"))
 .build(), MediaItem.FLAG_BROWSABLE
 ));
 mediaItems.add(new MediaItem(
 new MediaDescription.Builder()
 .setMediaId(Const.MEDIA_ID_ITEM2)
 .setTitle("Item 02")
 .setIconUri(Uri.parse( "android.resource://my.package.name/drawable/icon"))
 .build(), MediaItem.FLAG_PLAYABLE
 ));
 result.sendResult(mediaItems);
 }
 } MyMediaBrowserService.java (1/2)
41. Create Sliding Menus private final class MediaSessionCallback extends MediaSession.Callback {
 
 @Override
 public void onPlayFromMediaId(String mediaId, Bundle extras) {
 if (Const.MEDIA_ID_ITEM2.equals(mediaId)) { // ...
 // Play media // ...
 }
 } // ...
 } MyMediaBrowserService.java (2/2)
43. Create Sliding Menus (Async) @Override
 public void onLoadChildren(final String parentMediaId, final Result<List<MediaItem>> result) {
 result.detach();
 mMusicProvider.retrieveMediaAsync(new MusicProvider.Callback() {
 @Override
 public void onMusicCatalogReady() {
 List<MediaItem> mediaItems = new ArrayList<>();
 // ... // Prepare to create items // ...
 result.sendResult(mediaItems);
 }
 });
 } MyMediaBrowserService.java
44. Setting Playback State PlaybackState.Builder stateBuilder = new PlaybackState.Builder();
 int playbackState = PlaybackState.STATE_PLAYING;
 
 long action = PlaybackState.ACTION_PAUSE;
 action |= PlaybackState.ACTION_SKIP_TO_NEXT;
 action |= PlaybackState.ACTION_SKIP_TO_PREVIOUS;
 stateBuilder.setActions(action);
 
 stateBuilder.setState(playbackState, -1, 1.0f);
 
 mSession.setPlaybackState(stateBuilder.build());
 
 MediaMetadata.Builder metaBuilder = new MediaMetadata.Builder();
 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
 metaBuilder.putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART, bitmap);
 
 metaBuilder.putString(MediaMetadata.METADATA_KEY_ARTIST, "Great Artist");
 metaBuilder.putString(MediaMetadata.METADATA_KEY_TITLE, "Song 1");
 mSession.setMetadata(metaBuilder.build());
 
 mSession.setActive(true); MyMediaBrowserService.java
46. Show Error Message PlaybackState.Builder stateBuilder = new PlaybackState.Builder();
 int playbackState = PlaybackState.STATE_ERROR;
 stateBuilder.setState(playbackState, -1, 1.0f);
 stateBuilder.setErrorMessage("Oh no! Something has gone wrong.");
 mSession.setPlaybackState(stateBuilder.build()); MyMediaBrowserService.java
47. Playing Queue ArrayList<MediaMetadata> mediaMetadatas = new ArrayList<>();
 for (int i = 0; i < 5; i++) {
 String coverUrl = "android.resource://my.package.name/drawable/icon";
 MediaMetadata.Builder builder = new MediaMetadata.Builder();
 builder.putString(MediaMetadata.METADATA_KEY_ALBUM_ART_URI, coverUrl);
 builder.putString(MediaMetadata.METADATA_KEY_ARTIST, "Great artist");
 builder.putString(MediaMetadata.METADATA_KEY_TITLE, "Song " + (i + 1));
 MediaMetadata metadata = builder.build();
 mediaMetadatas.add(metadata);
 } MyMediaBrowserService.java (1/2)
48. Playing Queue List<MediaSession.QueueItem> queue = convertToQueue(mediaMetadatas);
 mSession.setQueue(queue);
 mSession.setQueueTitle("Now Playing"); private static List<MediaSession.QueueItem> convertToQueue(
 Iterable<MediaMetadata> tracks) {
 List<MediaSession.QueueItem> queue = new ArrayList<>();
 int count = 0;
 for (MediaMetadata track : tracks) {
 
 String hierarchyAwareMediaID = "";
 
 MediaMetadata trackCopy = new MediaMetadata.Builder(track)
 .putString(MediaMetadata.METADATA_KEY_MEDIA_ID, hierarchyAwareMediaID)
 .build();
 
 MediaSession.QueueItem item = new MediaSession.QueueItem(
 trackCopy.getDescription(), count++);
 queue.add(item);
 }
 return queue;
 } MyMediaBrowserService.java (2/2)
50. VOICE COMMAND
52. Ok Google,
54. Ok Google, Listen Jazz music on <YourApp>
55. MediaSession Callback private final class MediaSessionCallback extends MediaSession.Callback { 
 @Override
 public void onPlayFromSearch(final String query, final Bundle extras) { // Perform voice actions
 }
 } MyMediaBrowserService.java
56. Semantic Analysis GOOGLE KNOWLEDGE GRAPH Play music from Lady Gaga. Play Jazz music. Play Starships 
 from Nicki Minaj. Artist Extras Genre Extras Song name Extras
57. Examples ▸ MediaBrowserService ▸ https://github.com/googlesamples/android-MediaBrowserService/ ▸ UniversalMusicPlayer ▸ https://github.com/googlesamples/android-UniversalMusicPlayer
58. MESSAGING APPS MAKING FOR ANDROID AUTO
60. Create MessageReceivers AndroidManifest.xml <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="my.package.name">
 
 <application>
 <!-- ... -->
 <meta-data android:name="com.google.android.gms.car.application"
 android:resource="@xml/automotive_app_desc"/>
 
 <receiver
 android:name=".MessageReadReceiver"
 android:exported="false">
 <intent-filter>
 <action android:name="my.package.name.ACTION_MESSAGE_READ"/>
 </intent-filter>
 </receiver>
 
 <receiver
 android:name=".MessageReplyReceiver"
 android:exported="false">
 <intent-filter>
 <action android:name="my.package.name.ACTION_MESSAGE_REPLY"/>
 </intent-filter>
 </receiver>
 </application>
 </manifest> (1/2)
61. automotive_app_desc.xml <?xml version="1.0" encoding="utf-8"?>
 <automotiveApp>
 <uses name="notification"/>
 </automotiveApp> Create MessageReceivers (2/2)
62. MessageReadReceiver public class MessageReadReceiver extends BroadcastReceiver {
 
 @Override
 public void onReceive(Context context, Intent intent) {
 int conversationId = intent.getIntExtra(Const.CONVERSATION_ID, -1);
 if (conversationId != -1) {
 // Actions with conversation was read
 }
 }
 } MessageReadReceiver.java
63. MessageReplyReceiver public class MessageReplyReceiver extends BroadcastReceiver {
 @Override
 public void onReceive(Context context, Intent intent) {
 if (Const.REPLY_ACTION.equals(intent.getAction())) {
 int conversationId = intent.getIntExtra(Const.CONVERSATION_ID, -1);
 
 Bundle remoteInput = RemoteInput.getResultsFromIntent(intent);
 CharSequence reply = "";
 if (remoteInput != null) {
 reply = remoteInput.getCharSequence(
 Const.EXTRA_REMOTE_REPLY);
 }
 if (conversationId != -1) {
 // Actions for receive reply message
 }
 }
 }
 } MessageReplyReceiver.java
64. Prepare PendingIntent int conversationId = 1;
 String name = "Johnny";
 String message = "Hello, World!"; // A pending Intent for reads
 Intent readIntent = new Intent()
 .addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES)
 .setAction(Const.READ_ACTION)
 .putExtra(Const.CONVERSATION_ID, conversationId);
 
 PendingIntent readPendingIntent = PendingIntent.getBroadcast(this,
 conversationId,
 readIntent,
 PendingIntent.FLAG_UPDATE_CURRENT); MainActivity.java (1/2)
65. Prepare PendingIntent // Build a RemoteInput for receiving voice input in a Car Notification
 RemoteInput remoteInput = new RemoteInput.Builder(Const.EXTRA_REMOTE_REPLY)
 .setLabel(getString(R.string.reply))
 .build();
 
 // Building a Pending Intent for the reply action to trigger
 Intent replyIntent = new Intent()
 .addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES)
 .setAction(Const.REPLY_ACTION)
 .putExtra(Const.CONVERSATION_ID, conversationId);
 
 PendingIntent replyPendingIntent = PendingIntent.getBroadcast(this,
 conversationId,
 replyIntent,
 PendingIntent.FLAG_UPDATE_CURRENT); MainActivity.java (2/2)
66. Build CarExtender & UnreadConversion // Create the UnreadConversation and populate it with the participant name,
 // read and reply intents.
 NotificationCompat.CarExtender.UnreadConversation.Builder unreadConvBuilder =
 new NotificationCompat.CarExtender.UnreadConversation.Builder(name)
 .setLatestTimestamp(System.currentTimeMillis())
 .setReadPendingIntent(readPendingIntent)
 .setReplyAction(replyPendingIntent, remoteInput)
 .addMessage(message);
 
 NotificationCompat.CarExtender carExtender = new NotificationCompat.CarExtender()
 .setUnreadConversation(unreadConvBuilder.build()); MainActivity.java
67. Make a Notification NotificationCompat.Action replyAction = new NotificationCompat.Action.Builder(
 R.drawable.icon, getString(R.string.reply), replyPendingIntent)
 .addRemoteInput(remoteInput)
 .build(); NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
 .setSmallIcon(R.drawable.icon)
 .setLargeIcon(BitmapFactory.decodeResource(
 getResources(), R.drawable.icon_big))
 .setContentText(message)
 .setWhen(System.currentTimeMillis())
 .setContentTitle(name)
 .setContentIntent(readPendingIntent)
 .extend(carExtender)
 .addAction(replyAction);
 
 NotificationManagerCompat manager = NotificationManagerCompat.from(this);
 manager.notify(conversationId, builder.build()); MainActivity.java
68. Examples ▸ MessagingService ▸ https://github.com/googlesamples/android-MessagingService
69. DEMO
70. Q & A