FIRST MEET WITH ANDROID AUTO Johnny Sung 2016.05.28 Android Taipei @ Yahoo! Slides URL: http://goo.gl/EasR9V

MOBILE DEVICES DEVELOPER Johnny Sung https://fb.com/j796160836 https://plus.google.com/+JohnnySung http://about.me/j796160836

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http://www.pioneerelectronics.com/androidauto/

FEATURES & LIMITATIONS INTRODUCING ANDROID AUTO

http://www.pioneerelectronics.com/androidauto/

DEMO

http://www.greenbot.com/article/2931099/android-auto-review-the-best-way-to-get-google-maps-in-your-car.html Navigation Tab

Phone Tab

Notification Tab

Music Tab

Vehicle info Tab

Vehicle info detail

***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/

SETUP & INSTALLATION

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.

1. Install Auto Desktop Head Unit emulator from the SDK Manager

https://play.google.com/store/apps/details?id=com.google.android.projection.gearhead 2. Install Android Auto app on phone

A. enable developer mode B. Select Start head unit server from menu.

#!/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

3. Connect your phone to computer via USB. 4. Run scripts

Mac Android phone

Emulator Commands ▸ day ▸ night ▸ daynight

Day mode Night mode

For safety reasons, TOUCHES 4 operation is limited within

Limited Operations ▸ 11 items per page ▸ 3 level depth

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AUDIO APPS MAKING FOR ANDROID AUTO

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Create MediaBrowserService 
 
 
 
 
 
 
 
 
 AndroidManifest.xml (1/3)

Create MediaBrowserService 
 
 
 automotive_app_desc.xml (2/3)

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> result) {
 // ...
 }
 } MyMediaBrowserService.java (3/3)

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

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() {
 } 
 // ...
 }

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) {
 }
 }

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

Create Sliding Menus @Override
 public void onLoadChildren(final String pId, final Result> result) {
 List 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)

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)

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Create Sliding Menus (Async) @Override
 public void onLoadChildren(final String parentMediaId, final Result> result) {
 result.detach();
 mMusicProvider.retrieveMediaAsync(new MusicProvider.Callback() {
 @Override
 public void onMusicCatalogReady() {
 List mediaItems = new ArrayList<>();
 // ... // Prepare to create items // ...
 result.sendResult(mediaItems);
 }
 });
 } MyMediaBrowserService.java

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

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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

Playing Queue ArrayList 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)

Playing Queue List queue = convertToQueue(mediaMetadatas);
 mSession.setQueue(queue);
 mSession.setQueueTitle("Now Playing"); private static List convertToQueue(
 Iterable tracks) {
 List 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)

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VOICE COMMAND

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Ok Google,

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Ok Google, Listen Jazz music on

MediaSession Callback private final class MediaSessionCallback extends MediaSession.Callback { 
 @Override
 public void onPlayFromSearch(final String query, final Bundle extras) { // Perform voice actions
 }
 } MyMediaBrowserService.java

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

Examples ▸ MediaBrowserService ▸ https://github.com/googlesamples/android-MediaBrowserService/ ▸ UniversalMusicPlayer ▸ https://github.com/googlesamples/android-UniversalMusicPlayer

MESSAGING APPS MAKING FOR ANDROID AUTO

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Create MessageReceivers AndroidManifest.xml 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 (1/2)

automotive_app_desc.xml 
 
 
 Create MessageReceivers (2/2)

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

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

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)

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)

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

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

Examples ▸ MessagingService ▸ https://github.com/googlesamples/android-MessagingService

DEMO

Q & A