Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 50); // know current brightness try { float curBrightnessValue=android.provider.Settings.System.getInt( getContentResolver(), android.provider.Settings.System.SCREEN_BRIGHTNESS); Log.d("mytesta", "memory " +curBrightnessValue ); } catch (Settings.SettingNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }