How to set a certain percentage of screen brightness in the application? For example, 30%.

    2 answers 2

    Add a line with resolution in the AndroidManifest.xml manifest:

    <uses-permission android:name="android.permission.WRITE_SETTINGS"/>

    Code to change the brightness:

     Settings.System.putInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, value);

    An example with a sikbar that changes the brightness of the screen.
    enSO .

    • But your answer helped me a lot, thanks! - GuardFromUA 2:21 pm

    Does not see permission in the manifesto ... Strange. This code helped:

      WindowManager.LayoutParams layout = getWindow().getAttributes(); layout.screenBrightness = 0.3F; getWindow().setAttributes(layout);

    The downside of it is that you need to enter in each activation.