Agfdhyk

If I play a music in other app, e.g. foobar2000

And then use this function to play music in my app, two players will play at the same time

public void playMusic(String file){

    Uri uri=Uri.parse("android.resource://" + getPackageName() + "/raw/"+file);



    if(uri!=null) {

        myPlayer = new MediaPlayer();

        if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){

                myPlayer.setAudioAttributes(new AudioAttributes.Builder()

                .setUsage(AudioAttributes.USAGE_MEDIA)

                .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)

                .build());

        }else{

            myPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

        }

        try {

            myPlayer.setDataSource(getApplicationContext(), uri);

        } catch (IllegalArgumentException e) {

        } catch (SecurityException e) {

        } catch (IllegalStateException e) {

        } catch (IOException e) {

        }

        try {

            myPlayer.prepare();

        } catch (IllegalStateException e) {

        } catch (IOException e) {

        }

        myPlayer.start();

    }

}

If I play music in my app first, and then play other player, the other players still cannot stop my player

If I try other two player apps, they can stop each other.

How can I force Android to play my player only, and allow other player to stop my player?

You need to use AudioManager class as below,
whenever u need audio focus, call below method

protected fun requestAudioFocus(): Boolean {

        val audioManager: AudioManager = binding.root.context.getSystemService(Context.AUDIO_SERVICE) as AudioManager



        val res = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

            mFocusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)

                    .setAudioAttributes(mPlaybackAttributes)

                    .setAcceptsDelayedFocusGain(true)

                    .setOnAudioFocusChangeListener(afChangeListener)

                    .build()

            audioManager.requestAudioFocus(mFocusRequest)

        } else {

            audioManager.requestAudioFocus(afChangeListener,

                    // Use the music stream.

                    AudioManager.STREAM_MUSIC,

                    // Request permanent focus.

                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)

        }

        return res == AudioManager.AUDIOFOCUS_REQUEST_GRANTED

    }

whenever you want to release it use code below,

val audioManager: AudioManager = binding.root.context.getSystemService(Context.AUDIO_SERVICE) as AudioManager

        try {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

                audioManager.abandonAudioFocusRequest(mFocusRequest)

            } else {

                audioManager.abandonAudioFocus(afChangeListener)

            }

        } catch (e: Exception) {



        }

In manifest u need to ask permission for modifying audio settings

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>

Note :- code snippet is in Kotlin