Question

In the following sample activity, the screen automatically wakes up right after the user switches it off (with power button), but only if I use the PowerManager.ON_AFTER_RELEASE flag. It doesn’t happen if I don’t use this flag.

public class TestActivity extends Activity {

    private WakeLock wakeLock;

    @Override
    protected void onResume() {
        super.onResume();

        wakeLock = ((PowerManager) getSystemService(Context.POWER_SERVICE)).newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK | PowerManager.ON_AFTER_RELEASE, "test");
        wakeLock.acquire();
    }

    @Override
    protected void onPause() {
        wakeLock.release();
        super.onPause();
    }

}

Is there a way to avoid this behaviour while still using the PowerManager.ON_AFTER_RELEASE flag ?

I have the same issue when using the MediaPlayer’s setWakeMode() method (I checked in the source code and it also uses this PowerManager.ON_AFTER_RELEASE flag)

Or maybe I just misunderstand the purpose of this flag…what is it made for then ?

Answer 1

Ok, after many experiments it seems that there is no way to avoid this auto screen wakeup when using this PowerManager.ON_AFTER_RELEASE.

As a consequence it’s not possible to use MediaPlayer.setWakeMode() without having this issue.