The audio volume is zero?

Question

I have an application with a mute button. I have been stuck on this for 4 and a half hours now, so I am plain desperate. I am trying to have the volume mute when user clicks

Answer 1

btn_mute.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            // TODO Auto-generated method stub
            AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            if(isChecked) {
                btn_mute.setBackgroundResource(R.drawable.mute_bt);
                audio.setStreamMute(AudioManager.STREAM_MUSIC, true);
            } else {
                btn_mute.setBackgroundResource(R.drawable.volume_bt);
                audio.setStreamMute(AudioManager.STREAM_MUSIC, false);
            }
        }
    });

Answer 2

I found the issue. I have changed STRAM_MUSIC to STREAM_RING, and the variable userVolumeOnStart.userVolume changes successfully!