Develop Reference

Pause other media apps

When I start my MediaPlayer, other apps that are playing audio don't stop. Same when using MediaRecorder.
I managed to use AudioManager to have some functionality, but much of that class is either deprecated, or for high APIs.
For example, I can register a callback, but I can't unregister it cause the abandonAudioFocus() is deprecated.
Looking at sources, it tells me to use a MediaSession, but that's too complicated for my simple goal of playing a simple recorded audio, I don't want to use all the functionality of every single Android platform.

You can do that with AudioManager
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
// Request audio focus for playback
int result = am.requestAudioFocus(focusChangeListener,
// Use the music stream.
AudioManager.STREAM_MUSIC,
// Request permanent focus.
AudioManager.AUDIOFOCUS_GAIN);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
// other app had stopped playing song now , so u can do u stuff now .
}
Audio focus is assigned in turn to each application that requests it.
This means that if another application requests audio focus, your
application will lose it. You will be notifi ed of the loss of audio
focus through the onAudioFocusChange handler of the Audio Focus Change
Listener you registered when requesting the audio focus
private OnAudioFocusChangeListener focusChangeListener =
new OnAudioFocusChangeListener() {
public void onAudioFocusChange(int focusChange) {
AudioManager am =(AudioManager)getSystemService(Context.AUDIO_SERVICE);
switch (focusChange) {
case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) :
// Lower the volume while ducking.
mediaPlayer.setVolume(0.2f, 0.2f);
break;
case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT) :
pause();
break;
case (AudioManager.AUDIOFOCUS_LOSS) :
stop();
ComponentName component =new ComponentName(AudioPlayerActivity.this,MediaControlReceiver.class);
am.unregisterMediaButtonEventReceiver(component);
break;
case (AudioManager.AUDIOFOCUS_GAIN) :
// Return the volume to normal and resume if paused.
mediaPlayer.setVolume(1f, 1f);
mediaPlayer.start();
break;
default: break;
}
}
};

Android Nougat Media Player how put music Animation in Lock Screen?

I am using the original Music player in android Nougat, while the music is playing in the Lock Screen Appear an animation in the Buttom like this screenshot.
But when i using my own App Media Player in the same Android Nougat and Same device in the Lock Screen dont appear that animation.
The question is: How can i Add that animation in my Media Player App? it´s not a gif image because The animation moves to the rhythm of the music.
**This is my Notification Method ** if i am missing something or if i have to add something else.
ublic void Custom_Notificacion(){
Notification notification = new Notification(R.drawable.logobubble, null, System.currentTimeMillis());
notificationView = new RemoteViews(getPackageName(), R.layout.layout_notificacion_personalizada);
notificationView.setImageViewBitmap(R.id.id_FotoAlbumNotif,FotoNotif);
notificationView.setTextViewText(R.id.id_NombreMp3Notif,NommbreArtista);
notificationView.setTextViewText(R.id.id_NombreCancionNotif,NombreCancion);
notification.contentView = notificationView;
notification.flags |= Notification.FLAG_NO_CLEAR;
startForeground(constantes.NOTIFICATION_ID.FOREGROUND_SERVICE,notification);
}

I've read an article about this,an feasible solution is custom a lock screen page and display the Animation view within it,to achieve this you need a Service listening to the LOCK_SCREEN Broadcast,and start your LockScreenActivity ;replace the system lock screen at the same time.
here is some code segment might be helpful:
Register Broadcast Receiver
IntentFilter mScreenOffFilter = new IntentFilter();
mScreenOffFilter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(mScreenOffReceiver, mScreenOffFilter);
　　// on receive method
private BroadcastReceiver mScreenOffReceiver = new BroadcastReceiver() {
#SuppressWarnings("deprecation")
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(NOTIFY_SCREEN_OFF)) {
Intent mLockIntent = new Intent(context, LockScreenActivity.class);
mLockIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(mLockIntent);
}
}
Disable the Lock screen
KeyguardManager mKeyguardManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
KeyguardManager.KeyguardLock mKeyguardLock = mKeyguardManager.newKeyguardLock("CustomLockScreen");
mKeyguardLock.disableKeyguard();
Hope this could be a little help

Hardware volume buttons are not working when my app is running

I have been working on an app that plays some audio. I am currently playing the audio as a STREAM_MUSIC type of stream and this works just fine. I want to be able to control the volume with the hardware volume controls on the device. When I am in the app the hardware buttons don't do anything, the volume doesn't change and the toast doesn't pop up. I then press the home button so the app is running in the background the hardware volume buttons work. They only work when my app is running in the background.
I have tried to use the code this.setVolumeControlStream(AudioManager.STREAM_MUSIC); in my onCreate() method and this did not change the apps behavior and I am still facing the same problems.
I also have been testing this on a DROID 2, DROID RAZR, Samsung Galaxy s3, Samsung Galaxy s4, Lenovo tablet, and a rooted DROID 2 but they all behave the same.
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
setVolumeControlStream(audio.STREAM_MUSIC); //this line should set up the hardware
//buttons to control the volume
if (QtApplication.m_delegateObject != null && QtApplication.onCreate != null) {
QtApplication.invokeDelegateMethod(QtApplication.onCreate, savedInstanceState);
return;
}
requestWindowFeature(Window.FEATURE_NO_TITLE);
try {
m_activityInfo = getPackageManager().getActivityInfo(getComponentName(), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
e.printStackTrace();
finish();
return;
}
if (null == getLastNonConfigurationInstance()) {
// if splash screen is defined, then show it
if (m_activityInfo.metaData.containsKey("android.app.splash_screen") )
setContentView(m_activityInfo.metaData.getInt("android.app.splash_screen"));
startApp(true);
}
}

You may be tempted to try and listen for volume key presses and modify the volume of your audio stream that way. Resist the urge. Android provides the handy setVolumeControlStream() method to direct volume key presses to the audio stream you specify.
Take a look at this, I think it might be helpful:
Use Hardware Volume Keys to Control Your App’s Audio Volume
EDIT:
on your oncreate method you have to do:
this.setVolumeControlStream(AudioManager.STREAM_MUSIC); //if you use AudioManager.STREAM_MUSIC to load the sound
soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
#Override
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
loaded = true;
}
});
soundPool.load(this, R.raw.sound1, 1); // your sound

How to start a second media player ..?

I am developing an App where I want to play two mp3 files one is background music and another audio plays after 20 seconds.
mediaPlayer = MediaPlayer.create(this, R.raw.testsong_20_sec);
mediaPlayer1 = MediaPlayer.create(this,R.raw.sound3 );
private void buttonClick(){
if (buttonPlayStop.getText() == getString(R.string.play_str)) {
buttonPlayStop.setText(getString(R.string.pause_str));
try
{
mediaPlayer.start();
mediaPlayer1.start();
startPlayProgressUpdater();
}
catch (IllegalStateException e) {
mediaPlayer.pause();
}
}

Use MediaPlayer to play background music and SoundPool for everything else.

You can play two files in Mediaplayer by using this piece of code in a thread(don't use UI thread for this) :
mediaplayer = new MediaPlayer();
mediaplayer.reset();
//For media file 1
mediaplayer.setDataSource(dataSourceOne);
mediaplayer.prepare();
mediaplayer.start();
Thread.sleep(500);//Set the time as per your need.
//For media file 2
mediaplayer.reset();
mediaplayer.setDataSource(dataSourceTwo);
mediaplayer.setLooping(true);
mediaplayer.prepare();
mediaplayer.start();
As per the better implementation perspective, write an util class with all the common methods (play(),pause(),stop()) and call every method from your class based on the requirement using a thread.

Android media player stop playing while in background

I'm making music player app with simple functionality. But when I listen music on my phone with Android 6, sometimes music stops playing until I turn on display again with power button. Then next song is playing, so it seems like it's problem with loading next song. I tried to write new app just to test it out, for this purpose I used this tutorial:
https://code.tutsplus.com/tutorials/background-audio-in-android-with-mediasessioncompat--cms-27030
To this example I added ArrayList with paths to songs. In mediaPlayer onCompletionListener I increase track counter and load new song to media player.
My code:
private void initMediaPlayer() {
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setWakeMode(getApplicationContext(), PowerManager.PARTIAL_WAKE_LOCK);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setVolume(1.0f, 1.0f);
mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer)
{
onTrackCompletion();
}
});
private void onTrackCompletion()
{
NextTrack();
Play();
}
private void NextTrack()
{
playlistPosition++;
if (playlistPosition == playlists.get(playlistCurrent).size){
playlistPosition = 0;
}
sendAction(ACTION_TRACK_NEXT);
if(mMediaPlayer.isPlaying()){
Pause();
}
loadSong();
Play();
}
private void loadSong()
{
String path = playlists.get(playlistCurrent).getPath(playlistPosition);
if(path == null || path == "")
{
return;
}
try
{
try
{
mMediaPlayer.setDataSource(path);
} catch( IllegalStateException e ) {
mMediaPlayer.release();
initMediaPlayer();
mMediaPlayer.setDataSource(path);
}
initMediaSessionMetadata();
} catch (IOException e) {
return;
}
try {
mMediaPlayer.prepare();
} catch (IOException e) {}
sendTrackData();
}
I don't know anymore why this doesn't work. In manifest I have WAKE_LOCK permission. I also set wake lock for Media player.
Edit:
Today I tried to move loading song into onPlayFromMediaId. I made broadcast from AutoActivity where is Media player to Main Activity and send back onPlayFromMediaId with path to song. But seems like this doesn't work either.I also find out that changing volume with buttons also wake up app.
Edit2:
I made many tests and added debug string in many places in code. And I found out that app stops at mediaplayer.prepare() until I trigger any action on phone (turn on display, volume up/down, click headset button). But I don't know how to fix this bug. I tried to use prepareAsync, but didn't help.

Unless you use foreground service, the system will kill your process and mediaplayer will stop.
below is a part from from a foreground service ( notification example).
builder.setContentTitle(aMessage) // required
.setSmallIcon(R.mipmap.ic_launcher)
.setContentText(this.getString(R.string.app_name)) // required
.setAutoCancel(false)
.setContentIntent(pendingIntent)
.setVibrate(new long[]{0L})
.setPriority(Notification.PRIORITY_HIGH);
int mId = 1489;
startForeground(mId, builder.build());
The above code is tested and working fine.