Display Ausschalten verhindern

PowerManager pm;
WakeLock wl;

@Override
public void onCreate(Bundle savedInstanceState) {

...

     PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
     PowerManager.WakeLock wl =  pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
}
@Override
public void onResume() {
     wl.acquire();
}
@Override
public void onPause() {
     wl.release();
}

PowerManager pm;
WakeLock wl;

@Override
public void onCreate(Bundle savedInstanceState) {

...

     pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
      wl =  pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
}
@Override
public void onResume() {
     super.onResume();
     wl.acquire();
}
@Override
public void onPause() {
     super.onPause();
     wl.release();
}