added android auto media player demo

AndroidAutoMedia/.gitignore

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+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build

AndroidAutoMedia/app/.gitignore

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+/build

AndroidAutoMedia/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 'Google Inc.:Google APIs:21'
+    buildToolsVersion "21.1.1"
+
+    defaultConfig {
+        applicationId "com.ptrprograms.androidautomedia"
+        minSdkVersion 21
+        targetSdkVersion 21
+        versionCode 1
+        versionName "1.0"
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.squareup.picasso:picasso:2.4.0'
+
+}

AndroidAutoMedia/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Applications/Android Studio.app/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

AndroidAutoMedia/app/src/androidTest/java/com/ptrprograms/androidautomedia/ApplicationTest.java

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+package com.ptrprograms.androidautomedia;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}

AndroidAutoMedia/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.ptrprograms.androidautomedia" >
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme" >
+
+
+        <meta-data android:name="com.google.android.gms.car.application"
+            android:resource="@xml/automotive_app_desc"/>
+
+        <meta-data android:name="com.google.android.gms.car.notification.SmallIcon"
+            android:resource="@drawable/ic_launcher" />
+
+
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service android:name=".AutoMediaBrowserService">
+            <intent-filter>
+                <action android:name="android.media.browse.MediaBrowserService" />
+            </intent-filter>
+        </service>
+    </application>
+
+</manifest>

AndroidAutoMedia/app/src/main/java/com/ptrprograms/androidautomedia/AutoMediaBrowserService.java

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+package com.ptrprograms.androidautomedia;
+
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.media.MediaDescription;
+import android.media.MediaMetadata;
+import android.media.Rating;
+import android.media.browse.MediaBrowser;
+import android.media.session.MediaSession;
+import android.media.session.PlaybackState;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.ResultReceiver;
+import android.service.media.MediaBrowserService;
+import android.text.TextUtils;
+import android.util.Log;
+import android.widget.Toast;
+
+import com.squareup.picasso.Picasso;
+import com.squareup.picasso.Target;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by paulruiz on 11/18/14.
+ */
+public class AutoMediaBrowserService extends MediaBrowserService {
+
+    private static final String BROWSEABLE_ROOT = "root";
+    private static final String BROWSEABLE_ROCK = "Rock";
+    private static final String BROWSEABLE_JAZZ = "Jazz";
+    private static final String BROWSEABLE_CAJUN = "Cajun";
+
+    private MediaSession mMediaSession;
+    private MediaSession.Token mMediaSessionToken;
+
+    private List<Song> mSongs;
+
+    private MediaSession.Callback mMediaSessionCallback = new MediaSession.Callback() {
+        @Override
+        public void onPlay() {
+            super.onPlay();
+
+            toggleMediaPlaybackState( true );
+        }
+
+        //This is called when the pause button is pressed, or when onPlayFromMediaId is called in
+        //order to pause any currently playing media
+        @Override
+        public void onPause() {
+            super.onPause();
+
+            Toast.makeText( getApplicationContext(), "MediaSession onPause", Toast.LENGTH_SHORT ).show();
+            toggleMediaPlaybackState( false );
+        }
+
+        @Override
+        public void onPlayFromMediaId(String mediaId, Bundle extras) {
+            super.onPlayFromMediaId(mediaId, extras);
+            Log.e( "Android Auto", "mediaId: " + mediaId );
+
+            initMediaMetaData( mediaId );
+            toggleMediaPlaybackState( true );
+        }
+
+        @Override
+        public void onCustomAction(String action, Bundle extras) {
+            super.onCustomAction(action, extras);
+        }
+    };
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+
+        mSongs = SongGenerator.generateSongs();
+
+        initMediaSession();
+    }
+
+    private void initMediaSession() {
+        mMediaSession = new MediaSession( this, "MediaSessionId" );
+        mMediaSession.setActive( true );
+        mMediaSession.setCallback( mMediaSessionCallback );
+
+        mMediaSessionToken = mMediaSession.getSessionToken();
+        setSessionToken( mMediaSessionToken );
+    }
+
+    private void initMediaMetaData( String id ) {
+
+        for( Song song : mSongs ) {
+            if( !TextUtils.isEmpty( song.getuId() ) && song.getuId().equalsIgnoreCase( id ) ) {
+                MediaMetadata.Builder builder = new MediaMetadata.Builder();
+
+                if( !TextUtils.isEmpty( song.getTitle() ) )
+                    builder.putText( MediaMetadata.METADATA_KEY_TITLE, song.getTitle() );
+
+                if( !TextUtils.isEmpty( song.getArtist() ) )
+                    builder.putText( MediaMetadata.METADATA_KEY_ARTIST, song.getArtist() );
+
+                if( !TextUtils.isEmpty( song.getGenre() ) )
+                    builder.putText( MediaMetadata.METADATA_KEY_GENRE, song.getGenre() );
+
+                if( !TextUtils.isEmpty( song.getAlbum() ) )
+                    builder.putText( MediaMetadata.METADATA_KEY_ALBUM, song.getAlbum() );
+
+                if( !TextUtils.isEmpty( song.getAlbumUrl() ) )
+                    builder.putText( MediaMetadata.METADATA_KEY_ALBUM_ART_URI, song.getAlbumUrl() );
+
+                mMediaSession.setMetadata( builder.build() );
+            }
+        }
+    }
+
+    private void toggleMediaPlaybackState( boolean playing ) {
+        PlaybackState playbackState;
+        if( playing ) {
+            playbackState = new PlaybackState.Builder()
+                    .setActions(PlaybackState.ACTION_PLAY_PAUSE)
+                    .setState(PlaybackState.STATE_PLAYING, 0, 1)
+                    .build();
+        } else {
+            playbackState = new PlaybackState.Builder()
+                    .setActions(PlaybackState.ACTION_PLAY_PAUSE)
+                    .setState(PlaybackState.STATE_PAUSED, 0, 1)
+                    .build();
+        }
+
+        mMediaSession.setPlaybackState( playbackState );
+    }
+
+    @Override
+    public BrowserRoot onGetRoot(String clientPackageName, int clientUid, Bundle rootHints) {
+        return new BrowserRoot(BROWSEABLE_ROOT, null);
+    }
+
+    @Override
+    public void onLoadChildren(String parentId, Result<List<MediaBrowser.MediaItem>> result) {
+        Log.e( "Android Auto", parentId);
+
+        List<MediaBrowser.MediaItem> items = getMediaItemsById(parentId);
+        if( items == null ) {
+            Toast.makeText( getApplicationContext(), "MediaItems null, should play", Toast.LENGTH_SHORT ).show();
+        } else {
+            result.sendResult( items );
+        }
+    }
+
+    private List<MediaBrowser.MediaItem> getMediaItemsById( String id ) {
+        List<MediaBrowser.MediaItem> mediaItems = new ArrayList();
+        if( BROWSEABLE_ROOT.equalsIgnoreCase( id ) ) {
+            mediaItems.add( generateBrowseableMediaItemByGenre(BROWSEABLE_CAJUN) );
+            mediaItems.add( generateBrowseableMediaItemByGenre(BROWSEABLE_JAZZ) );
+            mediaItems.add( generateBrowseableMediaItemByGenre(BROWSEABLE_ROCK) );
+        } else if( !TextUtils.isEmpty( id ) ) {
+            return getPlayableMediaItemsByGenre( id );
+        }
+
+        return mediaItems;
+    }
+
+    private List<MediaBrowser.MediaItem> getPlayableMediaItemsByGenre( String genre ) {
+        if( TextUtils.isEmpty( genre ) )
+            return null;
+
+        List<MediaBrowser.MediaItem> mediaItems = new ArrayList();
+
+        for( Song song : mSongs ) {
+            if( !TextUtils.isEmpty( song.getGenre() ) && genre.equalsIgnoreCase( song.getGenre() ) ) {
+                mediaItems.add( generatePlayableMediaItem( song ) );
+            }
+        }
+        return mediaItems;
+    }
+
+
+    private MediaBrowser.MediaItem generateBrowseableMediaItemByGenre( String genre ) {
+        MediaDescription.Builder mediaDescriptionBuilder = new MediaDescription.Builder();
+        mediaDescriptionBuilder.setMediaId( genre );
+        mediaDescriptionBuilder.setTitle( genre );
+        mediaDescriptionBuilder.setIconBitmap( BitmapFactory.decodeResource( getResources(), R.drawable.ic_launcher ) );
+
+        return new MediaBrowser.MediaItem( mediaDescriptionBuilder.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE );
+    }
+
+    private MediaBrowser.MediaItem generatePlayableMediaItem( Song song ) {
+        if( song == null )
+            return null;
+
+        MediaDescription.Builder mediaDescriptionBuilder = new MediaDescription.Builder();
+        mediaDescriptionBuilder.setMediaId( song.getuId() );
+
+        if( !TextUtils.isEmpty( song.getTitle() ) )
+            mediaDescriptionBuilder.setTitle( song.getTitle() );
+
+        if( !TextUtils.isEmpty( song.getArtist() ) )
+            mediaDescriptionBuilder.setSubtitle( song.getArtist() );
+
+        if( !TextUtils.isEmpty( song.getThumbnailUrl() ) )
+            mediaDescriptionBuilder.setIconUri( Uri.parse( song.getThumbnailUrl() ) );
+
+        return new MediaBrowser.MediaItem( mediaDescriptionBuilder.build(), MediaBrowser.MediaItem.FLAG_PLAYABLE );
+    }
+
+}

AndroidAutoMedia/app/src/main/java/com/ptrprograms/androidautomedia/MainActivity.java

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+package com.ptrprograms.androidautomedia;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+
+
+public class MainActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+    }
+
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        int id = item.getItemId();
+        if (id == R.id.action_settings) {
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}