Android : setVolume and setAudioStreamType(AudioManager.STREAM_VOICE_CALL);

Question

I am playing an audio file with an internal speaker using this code

audioManager = (AudioManager)Context.getSystemService(Context.AUDIO_SERVICE);
audioManager.setSpeakerphoneOn(false);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);

How can I set the volume?

Answer 1

Use adjustStreamVolume() on AudioManager .

Though, preferably, you let the user set the volume the normal way, via the volume control buttons. You can indicate what stream that is to control in your activity via setVolumeControlStream() .

Answer 2

am2 is an instance of AudioManager system service. am2 = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

// makes the media volume adjustment
public static int setVolume(int inputVol, Context sender) {
    int outVol;
    if (inputVol < 0)
        inputVol = 0;
    if (inputVol > am2.getStreamMaxVolume(AudioManager.STREAM_MUSIC))
        inputVol = am2.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    am2.setStreamVolume(AudioManager.STREAM_MUSIC, inputVol,
            AudioManager.FLAG_SHOW_UI);
    outVol = am2.getStreamVolume(AudioManager.STREAM_MUSIC);
    return outVol;
}