How to Stop Other Apps Playing Music from My Current Activity

How to stop other apps playing music from my current activity?

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;
}
}
};

How to stop music from playing when user switch to other page in Android Studio Kotlin?

This is a classic case of onDestroy of the Activity being called. I'll keep it short but there is a lifecycle through which an Activity undergoes and when you seem to come back from the SecondActivity to the first Activity, the onDestroy of your second activity is called to perform the destruction function

So the solution, override the onDestroy method in your DetailActivity class and do something like this

override fun onDestroy(){
 if(mediaPlayer != null){
   mediaPlayer!!.stop()
   mediaPlayer!!.reset()
   mediaPlayer!!.release()
   mediaPlayer = null
 }
}

You can read in detail about Activity Lifecyle

How to stop audio in other app (radio app, player, etc) when my app is playing sound?

i faced this before and that was the solution

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 .
}

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;
}}};

Stop MediaPlayer when an other app play music

You should use AudioManager service to receive notification whether you receive/lost audio focus (Managing audio focus). I've done similar thing in a project where when my app starts playing, Google Play pause and vice versa. Use the following code where you are controlling your media playback like (activity or service)-

// Add this code in a method

AudioManager am = null;

// Request focus for music stream and pass AudioManager.OnAudioFocusChangeListener
// implementation reference
int result = am.requestAudioFocus(this, AudioManager.STREAM_MUSIC, 
                AudioManager.AUDIOFOCUS_GAIN);

if(result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED)
{
    // Play
}

// Implements AudioManager.OnAudioFocusChangeListener

@Override
public void onAudioFocusChange(int focusChange) 
{
    if(focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT)
    {
        // Pause
    }
    else if(focusChange == AudioManager.AUDIOFOCUS_GAIN)
    {
        // Resume
    }
    else if(focusChange == AudioManager.AUDIOFOCUS_LOSS)
    {
        // Stop or pause depending on your need
    }
}

How can I keep background music playing whilst changing Activity?

The simplest solution that I can think of offhand if I needed to get this done would be to set a static flag variable in my global Application object (let's call it sStartingNewActivity). Wherever I'm starting an intent new activity (or pressing "back" from an activity that isn't the entry point, overriding the onBackPressed method), I'd set that value to true, and have onPause not stop the music if that flag is set. I'd set the value back to false in every activity's onCreate. I don't think a 1-2-second-pause-before-fadeout is a bad way to go, though -- that would actually behave pretty similarly to how it works when the user presses the "home" button in an iOS app that has background music.

EDIT: You can also try a service-based solution that "sniffs" for whether your activities are running by having your activities listen for a specific broadcast; there's some sample code online that I haven't tried but it's an interesting approach).

Android stopping background music service on with multiple activities

What you need to know is when your activity is in the background (and when it has returned). There are a few ways to do this, but a reliable way I found was based on this answer.

It works on the premise that using a time reference between activity transitions will most likely provide adequate evidence that an app has been "backgrounded" or not.

This has worked for me and in the callback you can reliably tell your service to do whatever you want.

Also, if your App goes to the background and you're playing, you should then startForeground in your service (so it gains priority) and when the app returns, just stopForeground.

That way you avoid having a foreground service all the time, even when the user is interacting with the app.

Stop another app's media player when i play new app's media player?

Before your app starts playing audio it should request—and receive—the audio focus. Likewise, it should know how to listen for a loss of audio focus and respond appropriately when that happens.

You can achieve this functionality by 'Managing Audio Focus'. These Links may help you

https://developer.android.com/training/managing-audio/audio-focus.html
http://android-developers.blogspot.in/2013/08/respecting-audio-focus.html

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