This android code snippet is for keep alive the screen of your android device during the execution of your app, please read the note also.
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
..screen will stay on during this section..
IMPORTANT: Remember to RELEASE the WakeLock when you have finished to use it, otherwise the screen will be ever turned on! 🙂