Android: How to disable the sound of all third-party apps' notifications from code?

Question

I need to disable all sounds of third-party apps' notifications from code.

Something like this: when the app is open - all notifications from all apps are silent. When the app closes - the sound settings return to what they were before.

How to implement it? Is it possible to do this?

Answer 1

It seems the AudioManager is what you are looking for.

You can access it like that (called inside an Activity in this example):

val audioManager: AudioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager

To get the current volume (so you can restore it at a later point), use

audioManager.getStreamVolume(AudioManager.STREAM_NOTIFICATION)

When your app starts, you mute the notifications by calling

for SDK < 23 :

audioManager.setStreamVolume(AudioManager.STREAM_NOTIFICATION, 0, 0)

for SDK >= 23 :

audioManager.adjustStreamVolume(AudioManager.STREAM_NOTIFICATION, AudioManager.ADJUST_MUTE, 0)

Note as per official docs:

From N onward, volume adjustments that would toggle Do Not Disturb are not allowed unless the app has been granted Do Not Disturb Access.

As mentioned is this answer , you'll need to declare ACCESS_NOTIFICATION_POLICY and actively request access.