How to control volume to app media on Android

Question

I’m like a doubt on how to control the volume of the app’s media.

I’m using this method:

Button button1;
MediaPlyer mp;
button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
    mp = MediaPlayer.create(Teste.this, R.raw.som);
    mp.start();
}

});

I wanted to decrease or increase the volume on the device, change the app and not mobile.

Answer 1

To control the volume of your application in Mediaplayer, you can use the method "setVolume"

// Volume baixo em ambos os lados (Esquerdo e direito) mp.setVolume(0,0)

To learn more about this method, visit: http://developer.android.com/reference/android/media/MediaPlayer.html#setVolume(float, float)

Answer 2

You can use the Audiomanager.

Example of use:

AudioManager audio = (AudioManager)  
        getApplicationContext().getSystemService(Context.AUDIO_SERVICE);

audio.setStreamVolume(AudioManager.STREAM_MUSIC, VALOR, 0); // Valor: 0~15

Answer 3

Add in(s) Activity that you want to change the media volume instead of the bell the method below:

@Override
    protected void onStart() {
        super.onStart();
        setVolumeControlStream (AudioManager.STREAM_MUSIC);
    }

The method onStart() refers to when the application starts.

There is more information on these links below:

link 1

link 2