Volume Control in android application

Question

I\'d like to know how to control my application\'s volume from the volume keys (contrary to my belief , I\'ve read they control only the ringer volume). Should I overwrite t

Answer 1

There was another question from a long time ago that asked the same thing. Essentially the answer is: don't override the onKeyDown and onKeyUp buttons. It's much better to simply use this one line setVolumeControlStream(AudioManager.STREAM_MUSIC); in your onCreate() method. That tells the OS that the volume buttons should affect the "media" volume when your application is visible, and that's the volume it uses for your application.

As for controlling the Media volume no matter what app is visible, I'm not sure that can be done - or if it could, whether that would be a good thing.

Answer 2

Hope this working android code will help you to develop your own volume control application:

public class audioSetting extends Activity {
      Button b;
        TextView t;
        SeekBar s;
        EditText e;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            b = (Button)findViewById(R.id.button1);
            s = (SeekBar)findViewById(R.id.seekBar1);
            e = (EditText)findViewById(R.id.editText1);

            b.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    // TODO Auto-generated method stub
                    finish();
                }
            });
            final AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
            int a = audioManager.getStreamMaxVolume(AudioManager.STREAM_RING);
            int c = audioManager.getStreamVolume(AudioManager.STREAM_RING);
            b.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    // TODO Auto-generated method stub
                    audioManager.setStreamVolume(AudioManager.STREAM_RING, (int)(Integer.parseInt(e.getText().toString().trim())), 0);
                    s.setProgress((int)(Integer.parseInt(e.getText().toString().trim())));
                }
            });

            s.setMax(a);
            s.setProgress(c);
            e.setText(""+c);
            s.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onStopTrackingTouch(SeekBar arg0) {
                }

                @Override
                public void onStartTrackingTouch(SeekBar arg0) {
                }

                @Override
                public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
                    audioManager.setStreamVolume(AudioManager.STREAM_RING, arg1, 0);
                    e.setText(""+s.getProgress());
                }
            });
        }
}

Answer 3

This is an old question but there is a superb library for dealing with volume control in android (even better than the volume buttons, which are limited to 5 increments of volume level).

http://code.google.com/p/media-volume-control

Take a look at this package, it provides continuous volume level as well as other nice features (such as when audio is interrupted, volume monitor to be notified if/when the volume level is changed by whatever means--handdy when showing a volume SeekBar, etc.).

Answer 4

In your activity you can use one of the following:

this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
this.setVolumeControlStream(AudioManager.STREAM_RING);  
this.setVolumeControlStream(AudioManager.STREAM_ALARM);  
this.setVolumeControlStream(AudioManager.STREAM_NOTIFICATION);  
this.setVolumeControlStream(AudioManager.STREAM_SYSTEM);  
this.setVolumeControlStream(AudioManager.STREAM_VOICECALL);