Develop Reference

How can i bind my media player activity with existing media player service?

I know similar kind of question has been asked before, but none of them are helping me. I am building a music player in which I want to connect my Music through my music player like play, pause etc. Currently, media player service is connected with playlist activity but I have custom designed my media player and I am not able to connect it to the service class.
my MusicPlayer Activity is like this:
public class MusicPlayer extends AppCompatActivity implements PlaylistFragment.OnFragmentInteractionListener{
public static final String Broadcast_PLAY_NEW_AUDIO = "com.example.anuj.musicmetest.PlayNewAudio";
ImageView buttonPlayToggle;
MediaPlayer mediaPlayer;
MediaPlayerService player;
boolean serviceBound = false;
private ServiceConnection serviceConnection = new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
MediaPlayerService.LocalBinder binder = (MediaPlayerService.LocalBinder) service;
player = binder.getService();
serviceBound = true;
}
#Override
public void onServiceDisconnected(ComponentName name) {
serviceBound = false;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_player);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("Music Player");
buttonPlayToggle = (ImageView) findViewById(R.id.button_play_toggle);
buttonPlayToggle.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(mediaPlayer == null) return;
if (mediaPlayer.isPlaying()) {
updatePlayToggle(true);
mediaPlayer.pause();
} else {
updatePlayToggle(false);
mediaPlayer.start();
}
}
});
if (!serviceBound) {
Intent playerIntent = new Intent(this, MediaPlayerService.class);
startService(playerIntent);
bindService(playerIntent, serviceConnection, Context.BIND_AUTO_CREATE);
} else {
Intent broadcastIntent = new Intent(Broadcast_PLAY_NEW_AUDIO);
sendBroadcast(broadcastIntent);
}
}
public void updatePlayToggle(boolean play) {
buttonPlayToggle.setImageResource(play ? R.drawable.ic_pause : R.drawable.ic_play);
}
My ServicecClass is like this:
public class MediaPlayerService extends Service implements MediaPlayer.OnCompletionListener,
MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener, MediaPlayer.OnSeekCompleteListener,
MediaPlayer.OnInfoListener, MediaPlayer.OnBufferingUpdateListener,
AudioManager.OnAudioFocusChangeListener {
public static final String ACTION_PLAY = "com.example.anuj.musicmetest.ACTION_PLAY";
public static final String ACTION_PAUSE = "com.example.anuj.musicmetest.ACTION_PAUSE";
public static final String ACTION_PREVIOUS = "com.example.anuj.musicmetest.ACTION_PREVIOUS";
public static final String ACTION_NEXT = "com.example.anuj.musicmetest.ACTION_NEXT";
public static final String ACTION_STOP = "com.example.anuj.musicmetest.ACTION_STOP";
private MediaPlayer mediaPlayer;
private MediaSessionManager mediaSessionManager;
private MediaSessionCompat mediaSession;
private MediaControllerCompat.TransportControls transportControls;
private static final int NOTIFICATION_ID = 101;
//Used to pause/resume MediaPlayer
private int resumePosition;
//AudioFocus
private AudioManager audioManager;
// Binder given to clients
private final IBinder iBinder = new LocalBinder();
private ArrayList<Audio> audioList;
private int audioIndex = -1;
private Audio activeAudio; //an object on the currently playing audio
//Handle incoming phone calls
private boolean ongoingCall = false;
private PhoneStateListener phoneStateListener;
private TelephonyManager telephonyManager;
/**
* Service lifecycle methods
*/
#Override
public IBinder onBind(Intent intent) {
return iBinder;
}
#Override
public void onCreate() {
super.onCreate();
callStateListener();
//ACTION_AUDIO_BECOMING_NOISY -- change in audio outputs -- BroadcastReceiver
registerBecomingNoisyReceiver();
//Listen for new Audio to play -- BroadcastReceiver
register_playNewAudio();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
//Load data from SharedPreferences
StorageUtil storage = new StorageUtil(getApplicationContext());
audioList = storage.loadAudio();
audioIndex = storage.loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
//index is in a valid range
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
} catch (NullPointerException e) {
stopSelf();
}
//Request audio focus
if (!requestAudioFocus()) {
//Could not gain focus
stopSelf();
}
if (mediaSessionManager == null) {
try {
initMediaSession();
initMediaPlayer();
} catch (RemoteException e) {
e.printStackTrace();
stopSelf();
}
buildNotification(PlaybackStatus.PLAYING);
}
//Handle Intent action from MediaSession.TransportControls
handleIncomingActions(intent);
return super.onStartCommand(intent, flags, startId);
}
#Override
public boolean onUnbind(Intent intent) {
mediaSession.release();
removeNotification();
return super.onUnbind(intent);
}
#Override
public void onDestroy() {
super.onDestroy();
if (mediaPlayer != null) {
stopMedia();
mediaPlayer.release();
}
removeAudioFocus();
//Disable the PhoneStateListener
if (phoneStateListener != null) {
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
}
removeNotification();
//unregister BroadcastReceivers
unregisterReceiver(becomingNoisyReceiver);
unregisterReceiver(playNewAudio);
//clear cached playlist
new StorageUtil(getApplicationContext()).clearCachedAudioPlaylist();
}
/**
* Service Binder
*/
public class LocalBinder extends Binder {
public MediaPlayerService getService() {
// Return this instance of LocalService so clients can call public methods
return MediaPlayerService.this;
}
}
/**
* MediaPlayer callback methods
*/
#Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
//Invoked indicating buffering status of
//a media resource being streamed over the network.
}
#Override
public void onCompletion(MediaPlayer mp) {
//Invoked when playback of a media source has completed.
stopMedia();
removeNotification();
//stop the service
stopSelf();
}
#Override
public boolean onError(MediaPlayer mp, int what, int extra) {
//Invoked when there has been an error during an asynchronous operation
switch (what) {
case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
Log.d("MediaPlayer Error", "MEDIA ERROR NOT VALID FOR PROGRESSIVE PLAYBACK " + extra);
break;
case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
Log.d("MediaPlayer Error", "MEDIA ERROR SERVER DIED " + extra);
break;
case MediaPlayer.MEDIA_ERROR_UNKNOWN:
Log.d("MediaPlayer Error", "MEDIA ERROR UNKNOWN " + extra);
break;
}
return false;
}
#Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
//Invoked to communicate some info
return false;
}
#Override
public void onPrepared(MediaPlayer mp) {
//Invoked when the media source is ready for playback.
playMedia();
}
#Override
public void onSeekComplete(MediaPlayer mp) {
//Invoked indicating the completion of a seek operation.
}
#Override
public void onAudioFocusChange(int focusState) {
//Invoked when the audio focus of the system is updated.
switch (focusState) {
case AudioManager.AUDIOFOCUS_GAIN:
// resume playback
if (mediaPlayer == null) initMediaPlayer();
else if (!mediaPlayer.isPlaying()) mediaPlayer.start();
mediaPlayer.setVolume(1.0f, 1.0f);
break;
case AudioManager.AUDIOFOCUS_LOSS:
// Lost focus for an unbounded amount of time: stop playback and release media player
if (mediaPlayer.isPlaying()) mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
if (mediaPlayer.isPlaying()) mediaPlayer.pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
// Lost focus for a short time, but it's ok to keep playing
// at an attenuated level
if (mediaPlayer.isPlaying()) mediaPlayer.setVolume(0.1f, 0.1f);
break;
}
}
/**
* AudioFocus
*/
private boolean requestAudioFocus() {
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int result = audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
//Focus gained
return true;
}
//Could not gain focus
return false;
}
private boolean removeAudioFocus() {
return AudioManager.AUDIOFOCUS_REQUEST_GRANTED ==
audioManager.abandonAudioFocus(this);
}
/**
* MediaPlayer actions
*/
private void initMediaPlayer() {
if (mediaPlayer == null)
mediaPlayer = new MediaPlayer();//new MediaPlayer instance
//Set up MediaPlayer event listeners
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnInfoListener(this);
//Reset so that the MediaPlayer is not pointing to another data source
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
// Set the data source to the mediaFile location
mediaPlayer.setDataSource(activeAudio.getLocalData());
} catch (IOException e) {
e.printStackTrace();
stopSelf();
}
mediaPlayer.prepareAsync();
}
private void playMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
}
}
private void stopMedia() {
if (mediaPlayer == null) return;
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
}
private void pauseMedia() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
resumePosition = mediaPlayer.getCurrentPosition();
}
}
private void resumeMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(resumePosition);
mediaPlayer.start();
}
}
private void skipToNext() {
if (audioIndex == audioList.size() - 1) {
//if last in playlist
audioIndex = 0;
activeAudio = audioList.get(audioIndex);
} else {
//get next in playlist
activeAudio = audioList.get(++audioIndex);
}
//Update stored index
new StorageUtil(getApplicationContext()).storeAudioIndex(audioIndex);
stopMedia();
//reset mediaPlayer
mediaPlayer.reset();
initMediaPlayer();
}
private void skipToPrevious() {
if (audioIndex == 0) {
//if first in playlist
//set index to the last of audioList
audioIndex = audioList.size() - 1;
activeAudio = audioList.get(audioIndex);
} else {
//get previous in playlist
activeAudio = audioList.get(--audioIndex);
}
//Update stored index
new StorageUtil(getApplicationContext()).storeAudioIndex(audioIndex);
stopMedia();
//reset mediaPlayer
mediaPlayer.reset();
initMediaPlayer();
}
/**
* ACTION_AUDIO_BECOMING_NOISY -- change in audio outputs
*/
private BroadcastReceiver becomingNoisyReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//pause audio on ACTION_AUDIO_BECOMING_NOISY
pauseMedia();
buildNotification(PlaybackStatus.PAUSED);
}
};
private void registerBecomingNoisyReceiver() {
//register after getting audio focus
IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
registerReceiver(becomingNoisyReceiver, intentFilter);
}
/**
* Handle PhoneState changes
*/
private void callStateListener() {
// Get the telephony manager
telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
//Starting listening for PhoneState changes
phoneStateListener = new PhoneStateListener() {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
//if at least one call exists or the phone is ringing
//pause the MediaPlayer
case TelephonyManager.CALL_STATE_OFFHOOK:
case TelephonyManager.CALL_STATE_RINGING:
if (mediaPlayer != null) {
pauseMedia();
ongoingCall = true;
}
break;
case TelephonyManager.CALL_STATE_IDLE:
// Phone idle. Start playing.
if (mediaPlayer != null) {
if (ongoingCall) {
ongoingCall = false;
resumeMedia();
}
}
break;
}
}
};
// Register the listener with the telephony manager
// Listen for changes to the device call state.
telephonyManager.listen(phoneStateListener,
PhoneStateListener.LISTEN_CALL_STATE);
}
/**
* MediaSession and Notification actions
*/
private void initMediaSession() throws RemoteException {
if (mediaSessionManager != null) return; //mediaSessionManager exists
mediaSessionManager = (MediaSessionManager) getSystemService(Context.MEDIA_SESSION_SERVICE);
// Create a new MediaSession
mediaSession = new MediaSessionCompat(getApplicationContext(), "AudioPlayer");
//Get MediaSessions transport controls
transportControls = mediaSession.getController().getTransportControls();
//set MediaSession -> ready to receive media commands
mediaSession.setActive(true);
//indicate that the MediaSession handles transport control commands
// through its MediaSessionCompat.Callback.
mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
//Set mediaSession's MetaData
updateMetaData();
// Attach Callback to receive MediaSession updates
mediaSession.setCallback(new MediaSessionCompat.Callback() {
// Implement callbacks
#Override
public void onPlay() {
super.onPlay();
resumeMedia();
buildNotification(PlaybackStatus.PLAYING);
}
#Override
public void onPause() {
super.onPause();
pauseMedia();
buildNotification(PlaybackStatus.PAUSED);
}
#Override
public void onSkipToNext() {
super.onSkipToNext();
skipToNext();
updateMetaData();
buildNotification(PlaybackStatus.PLAYING);
}
#Override
public void onSkipToPrevious() {
super.onSkipToPrevious();
skipToPrevious();
updateMetaData();
buildNotification(PlaybackStatus.PLAYING);
}
#Override
public void onStop() {
super.onStop();
removeNotification();
//Stop the service
stopSelf();
}
#Override
public void onSeekTo(long position) {
super.onSeekTo(position);
}
});
}
private void updateMetaData() {
mediaSession.setMetadata(new MediaMetadataCompat.Builder()
.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, activeAudio.getLocalArtist())
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, activeAudio.getLocalAlbum())
.putString(MediaMetadataCompat.METADATA_KEY_TITLE, activeAudio.getLocalTitle())
.build());
}
private void buildNotification(PlaybackStatus playbackStatus) {
int notificationAction = android.R.drawable.ic_media_pause;//needs to be initialized
PendingIntent play_pauseAction = null;
//Build a new notification according to the current state of the MediaPlayer
if (playbackStatus == PlaybackStatus.PLAYING) {
notificationAction = android.R.drawable.ic_media_pause;
//create the pause action
play_pauseAction = playbackAction(1);
} else if (playbackStatus == PlaybackStatus.PAUSED) {
notificationAction = android.R.drawable.ic_media_play;
//create the play action
play_pauseAction = playbackAction(0);
}
// Create a new Notification
NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
// Hide the timestamp
.setShowWhen(false)
// Set the Notification style
.setStyle(new NotificationCompat.MediaStyle()
// Attach our MediaSession token
.setMediaSession(mediaSession.getSessionToken())
// Show our playback controls in the compat view
.setShowActionsInCompactView(0, 1, 2))
// Set the Notification color
.setColor(getResources().getColor(R.color.colorAccent))
// Set the large and small icons
.setSmallIcon(android.R.drawable.stat_sys_headset)
// Set Notification content information
.setContentText(activeAudio.getLocalArtist())
.setContentTitle(activeAudio.getLocalAlbum())
.setContentInfo(activeAudio.getLocalTitle())
// Add playback actions
.addAction(android.R.drawable.ic_media_previous, "previous", playbackAction(3))
.addAction(notificationAction, "pause", play_pauseAction)
.addAction(android.R.drawable.ic_media_next, "next", playbackAction(2));
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).notify(NOTIFICATION_ID, notificationBuilder.build());
}
private PendingIntent playbackAction(int actionNumber) {
Intent playbackAction = new Intent(this, MediaPlayerService.class);
switch (actionNumber) {
case 0:
// Play
playbackAction.setAction(ACTION_PLAY);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
case 1:
// Pause
playbackAction.setAction(ACTION_PAUSE);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
case 2:
// Next track
playbackAction.setAction(ACTION_NEXT);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
case 3:
// Previous track
playbackAction.setAction(ACTION_PREVIOUS);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
default:
break;
}
return null;
}
private void removeNotification() {
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
}
private void handleIncomingActions(Intent playbackAction) {
if (playbackAction == null || playbackAction.getAction() == null) return;
String actionString = playbackAction.getAction();
if (actionString.equalsIgnoreCase(ACTION_PLAY)) {
transportControls.play();
} else if (actionString.equalsIgnoreCase(ACTION_PAUSE)) {
transportControls.pause();
} else if (actionString.equalsIgnoreCase(ACTION_NEXT)) {
transportControls.skipToNext();
} else if (actionString.equalsIgnoreCase(ACTION_PREVIOUS)) {
transportControls.skipToPrevious();
} else if (actionString.equalsIgnoreCase(ACTION_STOP)) {
transportControls.stop();
}
}
/**
* Play new Audio
*/
private BroadcastReceiver playNewAudio = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//Get the new media index form SharedPreferences
audioIndex = new StorageUtil(getApplicationContext()).loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
//index is in a valid range
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
//A PLAY_NEW_AUDIO action received
//reset mediaPlayer to play the new Audio
stopMedia();
mediaPlayer.reset();
initMediaPlayer();
updateMetaData();
buildNotification(PlaybackStatus.PLAYING);
}
};
private void register_playNewAudio() {
//Register playNewMedia receiver
IntentFilter filter = new IntentFilter(FragmentRight.Broadcast_PLAY_NEW_AUDIO);
registerReceiver(playNewAudio, filter);
}
And my Playlist fragment is like this:
public class FragmentRight extends Fragment {
public static final String Broadcast_PLAY_NEW_AUDIO = "com.example.anuj.musicmetest.PlayNewAudio";
private OnFragmentInteractionListener mListener;
ArrayList<Audio> localList;
TextView nameView;
private MediaPlayerService mediaPlayer;
boolean serviceBound = false;
public FragmentRight() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_right, container, false);
nameView = (TextView) rootView.findViewById(R.id.name1);
loadAudio();
RecyclerView recyclerView1 = (RecyclerView) rootView.findViewById(R.id.recycler_view1);
LocalListAdapter localListAdapteradapter = new LocalListAdapter(getActivity().getApplication(), localList);
recyclerView1.setAdapter(localListAdapteradapter);
recyclerView1.setLayoutManager(new LinearLayoutManager(getActivity().getApplication()));
recyclerView1.addOnItemTouchListener(new CustomTouchListener(getActivity(), new onItemClickListener() {
#Override
public void onClick(View view, int index) {
playAudio(index);
Intent intent = new Intent(getActivity(), MusicPlayer.class);
startActivity(intent);
}
}));
return rootView;
}
private ServiceConnection serviceConnection = new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
// We've bound to LocalService, cast the IBinder and get LocalService instance
MediaPlayerService.LocalBinder binder = (MediaPlayerService.LocalBinder) service;
mediaPlayer = binder.getService();
serviceBound = true;
}
#Override
public void onServiceDisconnected(ComponentName name) {
serviceBound = false;
}
};
private void playAudio(int audioIndex) {
//Check is service is active
if (!serviceBound) {
//Store Serializable audioList to SharedPreferences
StorageUtil storage = new StorageUtil(getActivity().getApplicationContext());
storage.storeAudio(localList);
storage.storeAudioIndex(audioIndex);
Intent playerIntent = new Intent(getActivity(), MediaPlayerService.class);
getActivity().startService(playerIntent);
getActivity().bindService(playerIntent, serviceConnection, Context.BIND_AUTO_CREATE);
} else {
//Store the new audioIndex to SharedPreferences
StorageUtil storage = new StorageUtil(getActivity().getApplicationContext());
storage.storeAudioIndex(audioIndex);
Intent broadcastIntent = new Intent(Broadcast_PLAY_NEW_AUDIO);
getActivity().sendBroadcast(broadcastIntent);
}
}
private void loadAudio() {
ContentResolver contentResolver = getActivity().getContentResolver();
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + "!= 0";
String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";
Cursor cursor = contentResolver.query(uri, null, selection, null, sortOrder);
if (cursor != null && cursor.getCount() > 0) {
localList = new ArrayList<>();
while (cursor.moveToNext()) {
String localData = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
String localTitle = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
String localAlbum = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
String localArtist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
// Save to audioList
localList.add(new Audio(localData, localTitle, localAlbum, localArtist));
}
}
cursor.close();
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
#Override
public void onDestroy() {
super.onDestroy();
if (serviceBound) {
getContext().unbindService(serviceConnection);
//service is active
mediaPlayer.stopSelf();
}
}

Android Auto: My App doesn't play audio

I'm implementing Android Auto support for my app, but it is not working properly. I've followed Google's documentation and some tutorials, but the audio is not working. The controls, album art, artist name, etc., all appear just fine.
Strange behaviour: After running Spotify app through the Auto emulator and playing a song, if I go to my app and Try to play the audio, it works!
Here's the service class I've implemented:
/**
* Created by FelipeRRM on 8/13/2016.
*/
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class AutoMediaBrowserService extends MediaBrowserServiceCompat {
private static final String CURRENT_MEDIA_POSITION = "media_position_key";
private static final int PLAY = 1;
private static final int PAUSE = 2;
private static final int BUFFERING = 3;
private static final int CONNECTING = 4;
private static final int STOPPED = 5;
MediaPlayer mediaPlayer;
private static final String MY_MEDIA_ROOT_ID = "meuiddaraiz";
MediaSessionCompat mSession;
#Override
public void onCreate() {
super.onCreate();
mSession = new MediaSessionCompat(this, "session tag");
setSessionToken(mSession.getSessionToken());
// Set a callback object to handle play control requests, which
// implements MediaSession.Callback
mSession.setCallback(new MediaSessionCompat.Callback() {
#Override
public void onPlay() {
super.onPlay();
playMedia( PreferenceManager.getDefaultSharedPreferences( getApplicationContext() ).getInt( CURRENT_MEDIA_POSITION, 0 ), null );
}
//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();
setMediaPlaybackState(PAUSE);
pauseMedia();
}
#Override
public void onStop() {
super.onStop();
setMediaPlaybackState(STOPPED);
if( mediaPlayer != null ) {
pauseMedia();
mediaPlayer.release();
PreferenceManager.getDefaultSharedPreferences(AutoMediaBrowserService.this).edit().putInt( CURRENT_MEDIA_POSITION,
0 ).commit();
}
}
#Override
public void onPlayFromMediaId(String mediaId, Bundle extras) {
super.onPlayFromMediaId(mediaId, extras);
mSession.setMetadata(new MediaMetadataCompat.Builder()
.putText(MediaMetadataCompat.METADATA_KEY_TITLE, "primeira musica")
.putText(MediaMetadataCompat.METADATA_KEY_ARTIST, "Joãozinho das Rezas")
.putText(MediaMetadataCompat.METADATA_KEY_GENRE, "Gospel")
.putText(MediaMetadataCompat.METADATA_KEY_ALBUM_ART_URI, "http://70.38.6.72/~vivafe/web/wp-content/uploads/2016/08/01.jpg")
.build()
);
playMedia(0, mediaId);
}
#Override
public void onPlayFromSearch(String query, Bundle extras) {
super.onPlayFromSearch(query, extras);
}
});
mSession.setActive(true);
}
private void setMediaPlaybackState( int state ) {
PlaybackStateCompat playbackState = null;
switch (state) {
case PLAY:
playbackState = new PlaybackStateCompat.Builder()
.setActions( PlaybackStateCompat.ACTION_PLAY_PAUSE | PlaybackStateCompat.ACTION_SKIP_TO_NEXT | PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS )
.setState( PlaybackStateCompat.STATE_PLAYING, 0, 1 )
.build();
break;
case PAUSE:
playbackState = new PlaybackStateCompat.Builder()
.setActions( PlaybackStateCompat.ACTION_PLAY_PAUSE )
.setState(PlaybackStateCompat.STATE_PAUSED, 0, 1)
.build();
break;
case BUFFERING:
playbackState = new PlaybackStateCompat.Builder()
.setActions( PlaybackStateCompat.ACTION_STOP )
.setState(PlaybackStateCompat.STATE_BUFFERING, 0, 1)
.build();
break;
case CONNECTING:
playbackState = new PlaybackStateCompat.Builder()
.setActions( PlaybackStateCompat.ACTION_STOP )
.setState(PlaybackStateCompat.STATE_CONNECTING, 0, 1)
.build();
break;
case STOPPED:
playbackState = new PlaybackStateCompat.Builder()
.setActions( PlaybackStateCompat.ACTION_PLAY_FROM_MEDIA_ID )
.setState(PlaybackStateCompat.STATE_STOPPED, 0, 1)
.build();
break;
}
mSession.setPlaybackState( playbackState );
}
private void playMedia(final int position, String id ) {
setMediaPlaybackState(BUFFERING);
if( mediaPlayer != null )
try {
mediaPlayer.reset();
}
catch (Exception e){
mediaPlayer = new MediaPlayer();
e.printStackTrace();
}
else
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource("http://70.38.6.72/~vivafe/web/wp-content/uploads/2016/08/Mateus-01.mp3");
mediaPlayer.prepareAsync();
}
catch (Exception e){
e.printStackTrace();
}
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.start();
if( position > 0 )
mediaPlayer.seekTo( position );
setMediaPlaybackState(PLAY);
}
});
mediaPlayer.setOnInfoListener(new MediaPlayer.OnInfoListener() {
#Override
public boolean onInfo(MediaPlayer mediaPlayer, int state, int extra) {
switch (state){
case MediaPlayer.MEDIA_INFO_BUFFERING_START:{
Log.d("MediaPlayer","StartBuffer");
setMediaPlaybackState(BUFFERING);
break;
}
case MediaPlayer.MEDIA_INFO_BUFFERING_END:{
Log.d("MediaPlayer","EndBuffer");
setMediaPlaybackState(PLAY);
}
}
return true;
}
});
mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
#Override
public boolean onError(MediaPlayer mediaPlayer, int state, int extra) {
Log.e("MediaPlayer Error", String.valueOf(state));
return false;
}
});
}
private void pauseMedia() {
if( mediaPlayer != null ) {
mediaPlayer.pause();
PreferenceManager.getDefaultSharedPreferences( this ).edit().putInt( CURRENT_MEDIA_POSITION,
mediaPlayer.getCurrentPosition() ).commit();
}
}
#Nullable
#Override
public BrowserRoot onGetRoot(String s, int i, Bundle bundle) {
return new BrowserRoot(MY_MEDIA_ROOT_ID, null);
}
#Override
public void onLoadChildren(#NonNull String parentId, #NonNull Result<List<MediaBrowserCompat.MediaItem>> result) {
List<MediaBrowserCompat.MediaItem> mediaItems = new ArrayList<>();
// Check if this is the root menu:
if (parentId.equals(MY_MEDIA_ROOT_ID)) {
mediaItems.add(new MediaBrowserCompat.MediaItem(new MediaDescriptionCompat.Builder().setMediaId("iddopastor").setTitle("Pastor").build(), MediaBrowserCompat.MediaItem.FLAG_BROWSABLE));
} else if (parentId.equals("iddopastor")) {
mediaItems.add(new MediaBrowserCompat.MediaItem(new MediaDescriptionCompat.Builder().setMediaId("iddopastor2").setTitle("Pastor 2").build(), MediaBrowserCompat.MediaItem.FLAG_BROWSABLE));
// examine the passed parentMediaId to see which submenu we're at,
// and put the children of that menu in the mediaItems list
}
else if(parentId.equals("iddopastor2")){
mediaItems.add(new MediaBrowserCompat.MediaItem(new MediaDescriptionCompat.Builder().setMediaId("genealogia")
.setTitle("Tomé filho de José")
.setMediaUri(Uri.parse("http://70.38.6.72/~vivafe/web/wp-content/uploads/2016/08/Mateus-01.mp3"))
.setIconUri(Uri.parse("http://70.38.6.72/~vivafe/web/wp-content/uploads/2016/08/01.jpg"))
.build(), MediaBrowserCompat.MediaItem.FLAG_PLAYABLE));
}
result.sendResult(mediaItems);
}
#Override
public void onDestroy() {
mSession.release();
if( mediaPlayer != null ) {
pauseMedia();
mediaPlayer.release();
PreferenceManager.getDefaultSharedPreferences( this ).edit().putInt( CURRENT_MEDIA_POSITION,
0 ).commit();
}
super.onDestroy();
}
}
Sorry for the long code, but the erro might be anywhere on this class!
I've also put this on my AndroidManifest.xml:
<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_notification" />
<service android:name=".Auto.AutoMediaBrowserService"
android:exported="true">
<intent-filter>
<action android:name=
"android.media.browse.MediaBrowserService"/>
</intent-filter>
</service>
And I have this on my res\xml\automotive_app_desc.xml:
<automotiveApp>
<uses name="media" />
</automotiveApp>

I think I might had the same problem. try to request audio focus before you start playing. I can hear my music on the desktop head unit

How to record audio with Smart Eye Glass?

I am developing an audio recorder with Sony Smart Eyeglass, but it does not work well.
My application records just a voice from phone microphone, not from Smart Eyeglass microphone.
I'd like to record a voice just only from Smart Eyeglass microphone.
Any ideas?
Here is my code.
public class AudioRecordControl extends ControlExtension {
private final AudioManager _audioManager;
private final File _file;
private SmartEyeglassControlUtils _util;
private static final int SMARTEYEGLASS_API_VERSION = 1;
private MediaRecorder _recorder;
private MediaPlayer _player;
enum State {
STOP,
RECORDING,
PLAYING,
}
private State _state;
public AudioRecordControl(Context context, String hostAppPackageName) {
super(context, hostAppPackageName);
_util = new SmartEyeglassControlUtils(hostAppPackageName, new SmartEyeglassEventListener() {
#Override
public void onDialogClosed(int code) {
super.onDialogClosed(code);
doNextAction(code);
showCurrentLayout();
}
});
_util.setRequiredApiVersion(SMARTEYEGLASS_API_VERSION);
_util.activate(context);
_audioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
_audioManager.setMode(AudioManager.MODE_IN_CALL);
_audioManager.startBluetoothSco();
_state = State.STOP;
File directoryPath = Environment.getExternalStoragePublicDirectory("AudioRecord");
if (!directoryPath.exists()) {
if (!directoryPath.mkdirs()) {
Log.e(Constants.LOG_TAG, "failed to create directory '" + directoryPath.toString() + "'");
}
}
_file = new File(directoryPath, "record.3gp");
showCurrentLayout();
}
private void showCurrentLayout() {
showLayout(R.layout.layout, null);
switch (_state) {
case STOP:
String[] buttons;
if (_file.exists()) {
buttons = new String[]{
mContext.getString(R.string.record),
mContext.getString(R.string.play)};
} else {
buttons = new String[]{mContext.getString(R.string.record)};
}
_util.showDialogMessage(
mContext.getString(R.string.title),
mContext.getString(R.string.choose_one), buttons);
break;
case RECORDING:
_util.showDialogMessage(
mContext.getString(R.string.stop_recording),
com.sony.smarteyeglass.SmartEyeglassControl.Intents.DIALOG_MODE_OK);
break;
case PLAYING:
_util.showDialogMessage(
mContext.getString(R.string.stop_playing),
com.sony.smarteyeglass.SmartEyeglassControl.Intents.DIALOG_MODE_OK);
break;
default:
break;
}
}
private void doNextAction(int code) {
if (code == -1) {
stopRequest();
}
showLayout(R.layout.layout, null);
switch (_state) {
case STOP:
if (code == 0) {
Log.d(Constants.LOG_TAG, "start recording");
try {
_startRecording();
} catch (IOException e) {
Log.e(Constants.LOG_TAG, "failed to record", e);
_util.showDialogMessage(
mContext.getString(R.string.failed_to_record),
SmartEyeglassControl.Intents.DIALOG_MODE_TIMEOUT);
_recorder = null;
return;
}
_state = State.RECORDING;
} else if (code == 1) {
Log.d(Constants.LOG_TAG, "start playing");
try {
_play();
} catch (IOException e) {
Log.e(Constants.LOG_TAG, "failed to play", e);
_util.showDialogMessage(
mContext.getString(R.string.failed_to_pla),
SmartEyeglassControl.Intents.DIALOG_MODE_TIMEOUT);
_player = null;
return;
}
_state = State.PLAYING;
} else {
stopRequest();
}
break;
case RECORDING:
Log.d(Constants.LOG_TAG, "stop recording");
_stopRecord();
_state = State.STOP;
break;
case PLAYING:
Log.d(Constants.LOG_TAG, "stop playing");
_stopPlay();
_state = State.STOP;
break;
default:
_state = State.STOP;
break;
}
}
private void _startRecording() throws IOException {
if (_recorder == null) {
_recorder = new MediaRecorder();
_recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
_recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
_recorder.setOutputFile(String.valueOf(_file));
_recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
_recorder.prepare();
_recorder.start();
}
}
private void _stopRecord() {
if (_recorder != null) {
_recorder.stop();
_recorder.reset();
_recorder.release();
_recorder = null;
}
}
private void _play() throws IOException {
if (_player == null) {
_player = new MediaPlayer();
_player.setDataSource(String.valueOf(_file));
_player.prepare();
_player.start();
}
}
private void _stopPlay() {
if (_player != null) {
_player.stop();
_player.reset();
_player.release();
_player= null;
}
}
#Override
public void onResume() {
showCurrentLayout();
}
#Override
public void onTap(int action, long timeStamp) {
super.onTap(action, timeStamp);
showCurrentLayout();
}
#Override
public void onDestroy() {
Log.d(Constants.LOG_TAG, "Control On Desuptroy");
_util.deactivate();
_audioManager.setMode(AudioManager.MODE_NORMAL);
_audioManager.stopBluetoothSco();
}
}

Some phones require an extra method call after setMode:
private AudioManager m_amAudioManager;
m_amAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
m_amAudioManager.setMode(AudioManager.MODE_IN_CALL);
m_amAudioManager.setSpeakerphoneOn(false);
To learn more about rest of the operation, there is a guide on Audio I/O with SmartEyeglass:
https://developer.sony.com/develop/wearables/smarteyeglass-sdk/guides/use-bluetooth-for-audio-io/

Would you put your recording code in the Activity and test without using the eyeglass first?
As you are using the phone's capability only, it should work if you can record from microphone in Activity alone. Please ensure you have added uses-permission tag in AndroidManifest.xml

Play background music in all activities of Android app

I spend about 20 hours until now and my problem there still is .
I am creating an android application that has several Activities (mainMenu , aboutUs,setting).
I followed the best answered of below link and that was O.K .
Music played using asyncTask isn't stopping by using cancel
When i run my app,(my code is in mainActivity ), the music begin and it does not stop when navigate to other Activities . This is GOOD .
But i put a ToggleButton in my setting_activity Activity that i hope this Button starts and stops this music. NOW my question is how can i stop and/or start music again from setting_activity ?
in another solution :
I create a class MusicManager and i call it`s start and stop .
But this was several problems too :
Music started in mainMenu_activity but only play for about 15 seconds and then stopped.
I could not stop the music from another activities.At this time i play music in mainMenua_ctivity as this line codes :
MusicManager mm = new MusicManager(this, R.raw.background_sound);
mm.play();
How can i stop playing that ?
3. The music stopped when i navigate to other activities .
public class MusicManager implements OnPreparedListener {
static MediaPlayer mPlayer;
Context context;
private int mySoundId;
public MusicManager(Context ctx, int musicID) {
context = ctx;
mySoundId = musicID;
mPlayer = MediaPlayer.create(context, mySoundId);
mPlayer.setOnPreparedListener(this);
}
public void play() {
mPlayer = MediaPlayer.create(context, mySoundId);
}
public void stop() {
mPlayer.stop();
mPlayer.release();
}
#Override
public void onPrepared(MediaPlayer player) {
player.start();
mPlayer.setLooping(true);
mPlayer.setVolume(25, 25);
}
}
Finally i want to play a background music in all activities without stop/start music .
How can i do it ?

You could put the music player in a service. This would make it independent from the Activities and you would still be able to control the playback through intents.
Here are some code example about it: https://stackoverflow.com/a/8209975/2804473
The code below is written by Synxmax here at StackOverflow, and covered in the link above:
public class BackgroundSoundService extends Service {
private static final String TAG = null;
MediaPlayer player;
public IBinder onBind(Intent arg0) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
player = MediaPlayer.create(this, R.raw.idil);
player.setLooping(true); // Set looping
player.setVolume(100,100);
}
public int onStartCommand(Intent intent, int flags, int startId) {
player.start();
return 1;
}
public void onStart(Intent intent, int startId) {
// TO DO
}
public IBinder onUnBind(Intent arg0) {
// TO DO Auto-generated method
return null;
}
public void onStop() {
}
public void onPause() {
}
#Override
public void onDestroy() {
player.stop();
player.release();
}
#Override
public void onLowMemory() {
}
}

#Override
public void onCreate (){
super.onCreate();
Player = MediaPlayer.create(this, R.raw.jingle);
mPlayer.setOnErrorListener(this);
if(mPlayer!= null)
{
mPlayer.setLooping(true);
mPlayer.setVolume(100,100);
}
mPlayer.setOnErrorListener(new OnErrorListener() {
public boolean onError(MediaPlayer mp, int what, int
extra){
onError(mPlayer, what, extra);
return true;
}
});
}

public class serv extends Service{
MediaPlayer mp;
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
public void onCreate()
{
mp = MediaPlayer.create(this, R.raw.b);
mp.setLooping(false);
}
public void onDestroy()
{
mp.stop();
}
public void onStart(Intent intent,int startid){
Log.d(tag, "On start");
mp.start();
}
}

The top answer is correct, however you have to add the service to the manifest file.
<service android:enabled="true" android:name="BackgroundSoundService" />

Simon's answer above is correct. I had similar problem where I have fragments which had music player and I needed to go back to that UI on click of a button. Your case is similar but instead of going back to UI, you want to control playback. Here is what I did for my application. This takes care of playback of audio list including shuffle and repeat functionality. This takes care of showing media controls in notification bar too.
Create a service MusicPlayerService with following code:
public class MediaPlayerService extends Service implements MediaPlayer.OnCompletionListener,
MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener, MediaPlayer.OnSeekCompleteListener,
MediaPlayer.OnInfoListener, MediaPlayer.OnBufferingUpdateListener,
AudioManager.OnAudioFocusChangeListener {
public static final String ACTION_PLAY = "pkg_name.ACTION_PLAY";
public static final String ACTION_PAUSE = "pkg_name.ACTION_PAUSE";
public static final String ACTION_PREVIOUS = "pkg_name.ACTION_PREVIOUS";
public static final String ACTION_NEXT = "pkg_name.ACTION_NEXT";
public static final String ACTION_STOP = "pkg_name.ACTION_STOP";
private MediaPlayer mediaPlayer;
//MediaSession
private MediaSessionManager mediaSessionManager;
private MediaSessionCompat mediaSession;
private MediaControllerCompat.TransportControls transportControls;
//AudioPlayer notification ID
private static final int NOTIFICATION_ID = 101;
//Used to pause/resume MediaPlayer
private int resumePosition;
// Binder given to clients
private final IBinder iBinder = new LocalBinder();
//List of available Audio files
private ArrayList<PlayableTrack> audioList;
private int audioIndex = -1;
//Handle incoming phone calls
private boolean ongoingCall = false;
private PhoneStateListener phoneStateListener;
private TelephonyManager telephonyManager;
private Bitmap albumArtBitmap;
private boolean shuffle = false;
private boolean repeat = false;
private Random rand;
/**
* Service lifecycle methods
*/
#Override
public IBinder onBind(Intent intent) {
return iBinder;
}
#Override
public void onCreate() {
super.onCreate();
// Perform one-time setup procedures
// Manage incoming phone calls during playback.
// Pause MediaPlayer on incoming call,
// Resume on hangup.
callStateListener();
//ACTION_AUDIO_BECOMING_NOISY -- change in audio outputs -- BroadcastReceiver
registerBecomingNoisyReceiver();
//Listen for new Audio to play -- BroadcastReceiver
register_playNewAudio();
rand = new Random();
StorageUtil storage = new StorageUtil(getApplicationContext());
shuffle = storage.loadShuffleRepeat("Shuffle");
repeat = storage.loadShuffleRepeat("Repeat");
}
//The system calls this method when an activity, requests the service be started
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
//Load data from SharedPreferences
StorageUtil storage = new StorageUtil(getApplicationContext());
audioList = storage.loadAudio();
audioIndex = storage.loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
//index is in a valid range
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
} catch (NullPointerException e) {
stopSelf();
}
if (mediaSessionManager == null) {
try {
initMediaSession();
initMediaPlayer();
} catch (RemoteException e) {
e.printStackTrace();
stopSelf();
}
buildNotification(PlaybackStatus.PLAYING);
}
//Handle Intent action from MediaSession.TransportControls
handleIncomingActions(intent);
return super.onStartCommand(intent, flags, startId);
}
#Override
public boolean onUnbind(Intent intent) {
mediaSession.release();
removeNotification();
return super.onUnbind(intent);
}
#Override
public void onDestroy() {
super.onDestroy();
if (mediaPlayer != null) {
stopMedia();
mediaPlayer.reset();
}
//Disable the PhoneStateListener
if (phoneStateListener != null) {
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
}
removeNotification();
//unregister BroadcastReceivers
unregisterReceiver(becomingNoisyReceiver);
unregisterReceiver(playNewAudio);
Picasso.get().cancelRequest(target);
}
/**
* Service Binder
*/
public class LocalBinder extends Binder {
public MediaPlayerService getService() {
// Return this instance of LocalService so clients can call public methods
return MediaPlayerService.this;
}
}
/**
* MediaPlayer callback methods
*/
#Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
//Invoked indicating buffering status of
//a media resource being streamed over the network.
}
#Override
public void onCompletion(MediaPlayer mp) {
//Invoked when playback of a media source has completed.
stopMedia();
}
#Override
public boolean onError(MediaPlayer mp, int what, int extra) {
//Invoked when there has been an error during an asynchronous operation
switch (what) {
case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
Log.d("MediaPlayer Error", "MEDIA ERROR NOT VALID FOR PROGRESSIVE PLAYBACK " + extra);
break;
case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
Log.d("MediaPlayer Error", "MEDIA ERROR SERVER DIED " + extra);
break;
case MediaPlayer.MEDIA_ERROR_UNKNOWN:
Log.d("MediaPlayer Error", "MEDIA ERROR UNKNOWN " + extra);
break;
}
return false;
}
#Override
public void onPrepared(MediaPlayer mp) {
//Invoked when the media source is ready for playback.
playMedia();
}
#Override
public void onAudioFocusChange(int focusState) {
//Invoked when the audio focus of the system is updated.
switch (focusState) {
case AudioManager.AUDIOFOCUS_GAIN:
// resume playback
if (mediaPlayer == null) initMediaPlayer();
else if (!mediaPlayer.isPlaying()) mediaPlayer.start();
mediaPlayer.setVolume(1.0f, 1.0f);
break;
case AudioManager.AUDIOFOCUS_LOSS:
// Lost focus for an unbounded amount of time: stop playback and release media player
if (mediaPlayer.isPlaying()) mediaPlayer.stop();
mediaPlayer.reset();
mediaPlayer = null;
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
// Lost focus for a short time, but we have to stop
// playback. We don't release the media player because playback
// is likely to resume
if (mediaPlayer.isPlaying()) mediaPlayer.pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
// Lost focus for a short time, but it's ok to keep playing
// at an attenuated level
if (mediaPlayer.isPlaying()) mediaPlayer.setVolume(0.1f, 0.1f);
break;
}
}
/**
* MediaPlayer actions
*/
private void initMediaPlayer() {
if (mediaPlayer == null)
mediaPlayer = new MediaPlayer();//new MediaPlayer instance
//Set up MediaPlayer event listeners
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnInfoListener(this);
//Reset so that the MediaPlayer is not pointing to another data source
mediaPlayer.reset();
mediaPlayer.setAudioAttributes(new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build());
try {
// Set the data source to the mediaFile location
mediaPlayer.setDataSource(activeAudio.getFileLocation());
} catch (IOException e) {
e.printStackTrace();
stopSelf();
}
mediaPlayer.prepareAsync();
}
public void playMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
}
buildNotification(PlaybackStatus.PLAYING);
Intent intent = new Intent("PLAYBACK_STARTED");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
private void stopMedia() {
if (mediaPlayer == null) return;
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
}
public void pauseMedia() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
resumePosition = mediaPlayer.getCurrentPosition();
}
buildNotification(PlaybackStatus.PAUSED);
Intent intent = new Intent("PLAYBACK_PAUSED");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
private void resumeMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(resumePosition);
mediaPlayer.start();
buildNotification(PlaybackStatus.PLAYING);
Intent intent = new Intent("PLAYBACK_STARTED");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
}
/**
* ACTION_AUDIO_BECOMING_NOISY -- change in audio outputs
*/
private BroadcastReceiver becomingNoisyReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//pause audio on ACTION_AUDIO_BECOMING_NOISY
pauseMedia();
buildNotification(PlaybackStatus.PAUSED);
}
};
private void registerBecomingNoisyReceiver() {
//register after getting audio focus
IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
registerReceiver(becomingNoisyReceiver, intentFilter);
}
/**
* Handle PhoneState changes
*/
private void callStateListener() {
// Get the telephony manager
telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
//Starting listening for PhoneState changes
phoneStateListener = new PhoneStateListener() {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
//if at least one call exists or the phone is ringing
//pause the MediaPlayer
case TelephonyManager.CALL_STATE_OFFHOOK:
case TelephonyManager.CALL_STATE_RINGING:
if (mediaPlayer != null) {
pauseMedia();
ongoingCall = true;
}
break;
case TelephonyManager.CALL_STATE_IDLE:
// Phone idle. Start playing.
if (mediaPlayer != null) {
if (ongoingCall) {
ongoingCall = false;
resumeMedia();
}
}
break;
}
}
};
// Register the listener with the telephony manager
// Listen for changes to the device call state.
telephonyManager.listen(phoneStateListener,
PhoneStateListener.LISTEN_CALL_STATE);
}
/**
* MediaSession and Notification actions
*/
private void initMediaSession() throws RemoteException {
if (mediaSessionManager != null) return; //mediaSessionManager exists
mediaSessionManager = (MediaSessionManager) getSystemService(Context.MEDIA_SESSION_SERVICE);
// Create a new MediaSession
mediaSession = new MediaSessionCompat(getApplicationContext(), "AudioPlayer");
//Get MediaSessions transport controls
transportControls = mediaSession.getController().getTransportControls();
//set MediaSession -> ready to receive media commands
mediaSession.setActive(true);
//indicate that the MediaSession handles transport control commands
// through its MediaSessionCompat.Callback.
mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
//Set mediaSession's MetaData
updateMetaData();
// Attach Callback to receive MediaSession updates
mediaSession.setCallback(new MediaSessionCompat.Callback() {
// Implement callbacks
#Override
public void onPlay() {
super.onPlay();
resumeMedia();
}
#Override
public void onPause() {
super.onPause();
pauseMedia();
}
});
}
private void updateMetaData() {
fetchBitmapOfAlbum();
// Update the current metadata
mediaSession.setMetadata(new MediaMetadataCompat.Builder()
.putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART, albumArtBitmap)
.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, "")
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, activeAudio.getAlbumName())
.putString(MediaMetadataCompat.METADATA_KEY_TITLE, activeAudio.getTrackName())
.build());
}
private Target target = new Target() {
#Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
albumArtBitmap = bitmap;
}
#Override
public void onBitmapFailed(Exception e, Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
};
private void fetchBitmapOfAlbum() {
Picasso.get().load(activeAudio.getAlbumArt())
.placeholder(R.drawable.rotate_animation)
.error(R.drawable.ic_blank)
.into(target);
}
private void buildNotification(PlaybackStatus playbackStatus) {
int notificationAction = android.R.drawable.ic_media_pause;//needs to be initialized
PendingIntent play_pauseAction = null;
//Build a new notification according to the current state of the MediaPlayer
if (playbackStatus == PlaybackStatus.PLAYING) {
notificationAction = android.R.drawable.ic_media_pause;
//create the pause action
play_pauseAction = playbackAction(1);
} else if (playbackStatus == PlaybackStatus.PAUSED) {
notificationAction = android.R.drawable.ic_media_play;
//create the play action
play_pauseAction = playbackAction(0);
}
fetchBitmapOfAlbum(); //replace with your own image
String channelId = "";
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
channelId = "APP_MUSIC";
}
// Create a new Notification
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId)
// Hide the timestamp
.setShowWhen(false)
// Set the Notification style
.setStyle(new androidx.media.app.NotificationCompat.MediaStyle()
// Attach our MediaSession token
.setMediaSession(mediaSession.getSessionToken())
// Show our playback controls in the compat view
.setShowActionsInCompactView(0, 1, 2))
// Set the Notification color
.setColor(ContextCompat.getColor(this.getApplicationContext(), R.color.colorAccent))
// Set the large and small icons
.setLargeIcon(albumArtBitmap)
.setSmallIcon(R.drawable.ic_stat_notifications)
// Set Notification content information
.setContentText(activeAudio.getTrackName())
.setTicker(activeAudio.getAlbumName() + "-" + activeAudio.getTrackName())
.setOngoing(true)
.setContentTitle(activeAudio.getAlbumName())
.setContentInfo(activeAudio.getTrackName())
// Add playback actions
.addAction(notificationAction, "pause", play_pauseAction)
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).notify(NOTIFICATION_ID, notificationBuilder.build());
}
private PendingIntent playbackAction(int actionNumber) {
Intent playbackAction = new Intent(this, MediaPlayerService.class);
switch (actionNumber) {
case 0:
// Play
playbackAction.setAction(ACTION_PLAY);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
case 1:
// Pause
playbackAction.setAction(ACTION_PAUSE);
return PendingIntent.getService(this, actionNumber, playbackAction, 0);
default:
break;
}
return null;
}
private void removeNotification() {
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
}
private void handleIncomingActions(Intent playbackAction) {
if (playbackAction == null || playbackAction.getAction() == null) return;
String actionString = playbackAction.getAction();
if (actionString.equalsIgnoreCase(ACTION_PLAY)) {
transportControls.play();
} else if (actionString.equalsIgnoreCase(ACTION_PAUSE)) {
transportControls.pause();
}
}
/**
* Play new Audio
*/
private BroadcastReceiver playNewAudio = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//Get the new media index form SharedPreferences
audioIndex = new StorageUtil(getApplicationContext()).loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
//index is in a valid range
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
//A PLAY_NEW_AUDIO action received
//reset mediaPlayer to play the new Audio
stopMedia();
mediaPlayer.reset();
initMediaPlayer();
updateMetaData();
buildNotification(PlaybackStatus.PLAYING);
}
};
private void register_playNewAudio() {
//Register playNewMedia receiver
IntentFilter filter = new IntentFilter(MainActivity.Broadcast_PLAY_NEW_AUDIO);
registerReceiver(playNewAudio, filter);
}
public boolean isPlaying(){
return mediaPlayer.isPlaying();
}
public void setShuffle(){
if(shuffle) shuffle=false;
else shuffle=true;
StorageUtil storage = new StorageUtil(getApplicationContext());
storage.storeShuffleRepeat("Shuffle", shuffle);
}
public void setRepeat(){
if(repeat) repeat=false;
else repeat=true;
StorageUtil storage = new StorageUtil(getApplicationContext());
storage.storeShuffleRepeat("Repeat", repeat);
}
}
Add the service to your manifest
<service android:name=".service.MediaPlayerService" />
Bind the service in MainActivity and declare methods to call the service
public class MainActivity {
private MediaPlayerService player;
boolean serviceBound = false;
public static final String Broadcast_PLAY_NEW_AUDIO = "pkg_name.PlayNewAudio";
//Binding this Client to the AudioPlayer Service
private ServiceConnection serviceConnection = new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
// We've bound to LocalService, cast the IBinder and get LocalService instance
MediaPlayerService.LocalBinder binder = (MediaPlayerService.LocalBinder) service;
player = binder.getService();
serviceBound = true;
}
#Override
public void onServiceDisconnected(ComponentName name) {
serviceBound = false;
}
};
// Call this method to play track
public void playAudio(int audioIndex, ArrayList<PlayableTrack> updatedList) {
//Check is service is active
audioList = updatedList;
if (!serviceBound) {
Intent playerIntent = new Intent(this, MediaPlayerService.class);
startService(playerIntent);
bindService(playerIntent, serviceConnection, Context.BIND_AUTO_CREATE);
} else {
//Service is active
//Send a broadcast to the service -> PLAY_NEW_AUDIO
Intent broadcastIntent = new Intent(Broadcast_PLAY_NEW_AUDIO);
sendBroadcast(broadcastIntent);
}
}
// Additional methods for control
public void start() {
player.playMedia();
}
public void pause() {
player.pauseMedia();
}
public boolean isPlaying() {
if (player != null && serviceBound) {
return player.isPlaying();
}
return false;
}
}

This is my solution:
1- first add a music file in raw folder (in my case coffee.mp3)
2- create a class named BackgroundSoundService that extends Service:
public class BackgroundSoundService extends Service {
MediaPlayer mediaPlayer;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
mediaPlayer = MediaPlayer.create(this, R.raw.coffee);
mediaPlayer.setLooping(true); // Set looping
mediaPlayer.setVolume(100, 100);
}
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent.getAction().equals("PLAY")) {
if(mediaPlayer.isPlaying() == false) {
mediaPlayer.start();
Toast.makeText(getApplicationContext(), "Music Is Playing", Toast.LENGTH_SHORT).show();
}
}
if (intent.getAction().equals("STOP")) {
this.stopService(intent);
Toast.makeText(getApplicationContext(), "Music Stopped", Toast.LENGTH_SHORT).show();
}
return startId;
}
#Override
public void onDestroy() {
mediaPlayer.stop();
mediaPlayer.release();
}
#Override
public void onLowMemory() {
}
}
do not forget to define this service in application tag of android manifest.xml:
<service android:name=".BackgroundSoundService" />
3- for play button in your activity use this code:
btnPlay.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String action = "PLAY";
Intent myService = new Intent(MainActivity.this, BackgroundSoundService.class);
myService.setAction(action);
startService(myService);
}
});
3- for stop button in your activity use this code:
btnStop.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String action = "STOP";
Intent myService = new Intent(MainActivity.this, BackgroundSoundService.class);
myService.setAction(action);
startService(myService);
}
});
I have created a simple android app with two activity which play music in background service, the app will pause the music if app is not visible to the user (for example user pressed home button).
you can see it in my github for more details.

Ensure MediaPlayer onCompletionListener is called and the thread is not dead

I have a recurrent alarm that triggers a BroadcastReceiver that starts an IntentService that plays a sound using MediaPlayer. However, my OnCompletionListener (used for realeasing resources) is not called because the thread from IntentService dies before the sound ends and I get a warning message in the logs:
Handler{4072a788} sending message to a Handler on a dead thread
How can I keep the thread alive until the oncompletionlistener is called. Or is there a better approach to achieve what I want?

For Controll Media player that are play via local service, it is better to send Media player reference to other class Like CarefulMediaPlayer(mp, this);. You handle all media player properties in this class. I think it help you.
Thanks

I struggled for sometime with this issue and finally I got it to work properly using the below class. The idea is to use a thread with a Looper that remains alive and handles all the MediaPlayer logic.
I only quit the looper and clean the thread if the service received explicit stop message
public class PlayService extends IntentService {
private static PowerManager.WakeLock wakeLock;
private static final String TAG = "PlayService";
private static String LOCK_NAME = TAG;
public static final String EXTRA_FILE = "file";
public static final String ACTION_PLAY = "play";
private static final String ACTION_STOP = "stop";
public static final int MSG_START = 1;
public static final int MSG_STOP = 2;
public PlayService(String name) {
super(name);
}
public PlayService() {
super("PlayService");
}
#Override
public void onCreate() {
super.onCreate();
}
#Override
protected void onHandleIntent(Intent intent) {
Message msg = new Message();
if (ACTION_PLAY.equalsIgnoreCase(intent.getAction())) {
String fileName = intent.getExtras().getString(EXTRA_FILE);
msg.what = MSG_START;
msg.obj = fileName;
} else if (ACTION_STOP.equalsIgnoreCase(intent.getAction())) {
msg.what = MSG_STOP;
}
try {
PlayMediaThread.getInstance(this).sendMessage(msg);
} catch (InterruptedException e) {
Log.e(TAG, e.getMessage());
}
}
public static PowerManager.WakeLock acquireLock(Context context) {
if (wakeLock == null || !wakeLock.isHeld()) {
PowerManager powerManager = (PowerManager) context
.getSystemService(Context.POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
LOCK_NAME);
wakeLock.setReferenceCounted(true);
wakeLock.acquire();
}
return wakeLock;
}
public static void releaseLock(Context context) {
if (wakeLock != null && wakeLock.isHeld()) {
wakeLock.release();
}
}
}
class PlayMediaThread extends Thread implements OnCompletionListener,
OnErrorListener, OnPreparedListener {
private static Semaphore semaphore = new Semaphore(0);
private static Handler handler;
private static Looper myLooper;
private static Context context;
private static String currentFileName;
private static MediaPlayer player;
private static PlayMediaThread instance;
private static final String TAG = "PlayMediaThread";
private PlayMediaThread(Context context) throws InterruptedException {
super(TAG);
PlayMediaThread.context = context;
start();
// To insure that the looper was initialized correctly before return an
// instance
semaphore.acquire();
}
public static PlayMediaThread getInstance(Context context)
throws InterruptedException {
if (instance == null) {
instance = new PlayMediaThread(context);
}
PlayMediaThread.context = context;
return instance;
}
public void sendMessage(Message msg) {
handler.sendMessage(msg);
}
public void quitLooper() {
try {
if (myLooper != null) {
myLooper.quit();
Log.i(TAG, "After quit");
}
} catch (Exception ex) {
Log.e(TAG, ex.getMessage());
}
}
#Override
public void run() {
Looper.prepare();
myLooper = Looper.myLooper();
handler = new Handler() {
#Override
public void handleMessage(Message msg) {
if (msg.what == PlayService.MSG_START) {
startPlayer((String) msg.obj);
} else if (msg.what == PlayService.MSG_STOP) {
// when stop command is coming from the activity i.e. user
// explicitly clicked stop, I quit the looper and
// clean the thread
stopPlayer(true);
}
}
};
semaphore.release();
Log.i(TAG, "Before Loop");
Looper.loop();
}
private void stopPlayer(boolean clean) {
if (player != null) {
if (player.isPlaying()) {
player.stop();
}
player.release();
player = null;
}
if (clean) {
PlayService.releaseLock(context);
quitLooper();
instance = null;
}
}
private void startPlayer(String fileName) {
if (player != null && player.isPlaying() && currentFileName != null
&& currentFileName.equalsIgnoreCase(fileName)) {
return;
}
currentFileName = fileName;
stopPlayer(false);
player = new MediaPlayer();
player.setOnCompletionListener(this);
player.setOnErrorListener(this);
player.setOnPreparedListener(this);
try {
player.setDataSource(context, Uri.parse(currentFileName));
player.prepare();
player.start();
PlayService.acquireLock(context);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
#Override
public boolean onError(MediaPlayer mp, int arg1, int arg2) {
Log.e(TAG, "onError");
stopPlayer(true);
return false;
}
#Override
public void onCompletion(MediaPlayer mp) {
Log.d(TAG, "onCompletion");
// Just to quit the looper and clean the thread
stopPlayer(true);
}
#Override
public void onPrepared(MediaPlayer mp) {
Log.d(TAG, "onPrepared");
}
}