volume

Is there a broadcast action for volume changes?

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There is no broadcast action, but I did find you can hook up a content observer to get notified when the settings change, volume of streams being some of those settings. Register for the android.provider.Settings.System.CONTENT_URI to be notified of all settings changes: mSettingsContentObserver = new SettingsContentObserver( new Handler() ); this.getApplicationContext().getContentResolver().registerContentObserver( android.provider.Settings.System.CONTENT_URI, true, mSettingsContentObserver ); The … Read more

Listen to volume buttons in background service?

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It is possible. Use code below (for newer Android versions, especially Marshmallow, see bottom of the answer): public class SettingsContentObserver extends ContentObserver { int previousVolume; Context context; public SettingsContentObserver(Context c, Handler handler) { super(handler); context=c; AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); previousVolume = audio.getStreamVolume(AudioManager.STREAM_MUSIC); } @Override public boolean deliverSelfNotifications() { return super.deliverSelfNotifications(); } @Override public void … Read more

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