Android - Turn off screen without going in StandBy Mode

Question

I know that this question has been asked a lot of times but it has never been answered satisfactorily.

My problem is the following:

I have an activity which

Answer 1

Note : i wasn't able to work with WAKELOCK

I have figured a workaround which involves changing SCREEN_OFF_TIMEOUT. Use the below code to achieve it.

Settings.System.putInt(getContentResolver(), 
                           Settings.System.SCREEN_OFF_TIMEOUT, 10);

this sets 10 milliseconds as timeout for screen_timeout SYSTEM-WIDE .

Now you might be troubled by SYSTEM-WIDE changes brought upon by this. To work around that you can get the default screen_timeout_time and save it to a variable then set back the System's SCREEN_OFF_TIMEOUT at finish() of your activity.

Before setting 10ms as our screen_timeout get SCREEN_OFF_TIMEOUT,

int defaultScreenTimeout= android.provider.Settings.
      System.getInt(getContentResolver(),Settings.System.SCREEN_OFF_TIMEOUT,-1);

Now when you have finished with your changes or when your activity ends you may set the SCREEN_OFF_TIMEOUT back .

@Override
public void finish(){
    Settings.System.putInt(getContentResolver(), 
                      Settings.System.SCREEN_OFF_TIMEOUT, defaultScreenTimeout);
super.finish();
}