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androidscreen-brightness

change screen brightness when autobrightness enabled

The code below to change screen brightness is not working when auto brightness of device is enabled:

Window w = getWindow();
WindowManager.LayoutParams lp = w.getAttributes();

lp.screenBrightness=0.09f;
getWindow().setAttributes(lp);

How to change this code for working on auto brightness too?

Solution

  • DISCLAIMER: This code is kind of 'hackish', and might not work on all android versions and all android phones, and might not be the best code practice. I claim no responsibility if your device explodes, or it starts raining etc. :)

    That being said, you might want to disable autobrightness temporarily:

    Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);

    And then re-enable it:

    Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC);