Android Java : Turn screen Off
You need to give your App the right permissions to do that:
Add <uses-permission android:name="android.permission.DEVICE_POWER" />
to your Manifest inside the <manifest>
Tag
If you want to keep your Screen on use this, as suggested by Dianne Hackborn on Google Plus: KeepScreenOn
Comments
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Bertrand almost 2 years
I am making an application that turn the screen ON and OFF with the proximity sensor. The proximity code is finished, but i got trouble using the screen controls.
I have read that I should use,
PowerManager manager = (PowerManager) getSystemService(Context.POWER_SERVICE); manager.goToSleep(int amountOfTime);
For that, I need to grant special permissions in order to make it works, but I haven't figured out how to do it.
Also, I have read about changing screen brightness
WindowManager.LayoutParams params = getWindow().getAttributes(); params.flags |= LayoutParams.FLAG_KEEP_SCREEN_ON; params.screenBrightness = 0; getWindow().setAttributes(params);
But this way only turn the screen off on my application; it doesn't work if my application is running in background.
I have also read about using Wakelock (i use them to wake my phone from screen-off), but when
PowerManager manager = (PowerManager) getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock wl = manager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Your Tag"); wl.acquire(); wl.release();
But when I do that, nothing happens.
Is there any other way to do it ?