How to turn on/off all sounds from accessibility settings programmatically in android?

Question

In Android 4.0+ there is an option Settings->Accessibility-> Turn of all sounds. If I check that option, any application running on the android device will not produce any sound at all. My application has to give alarm sound, so if someone has checked that option, the app does not give any sound. So, I have to automatically un-check that option every time user launches the application. Through code, how can I do that?

It will be helpful if someone can share a piece of code. I have tried AudioManager, but that only works if mobile audio is enabled.

amanger.setRingerMode(AudioManager.RINGER_MODE_NORMAL);

amanger.setStreamMute(AudioManager.STREAM_MUSIC, false);

amanger.setStreamVolume(AudioManager.STREAM_MUSIC,
    (int)(amanger.getStreamMaxVolume(AudioManager.STREAM_MUSIC)*(75.0/100.0)), 0);

Answer 1

You can use following function to disable system volume

public static void disableSound(Context context)
 {
     AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
     audioManager.setStreamVolume(AudioManager.STREAM_SYSTEM, 0, 0);
 }

If you want to enable it again, just change the parameters

audioManager.setStreamVolume(AudioManager.STREAM_SYSTEM, 10, 0);

Volume ranges from 0-10