How to change system brightness?

Question

I want change the system brightness using my application. But as soon as i come out of that app. Brightness is again resetted to default value. What shud i do in order to make permanent change to brightness setting? I have tried few ways but all off them only work till my app is not closed.

duplicate of [How to change screen brightness](http://stackoverflow.com/questions/12487004/how-to-change-screen-brightness?rq=1) — John Dvorak, Nov 02 '12 at 08:01
See below. Let me know if it works. [Changing Screen Brightness](http://www.tutorialforandroid.com/2009/01/changing-screen-brightness.html) — retromuz, Nov 02 '12 at 08:25
Try this too. http://stackoverflow.com/questions/5032588/cant-apply-system-screen-brightness-programmatically-in-android — retromuz, Nov 02 '12 at 08:29

Arvind Kanjariya · Answer 1 · 2012-11-02T09:09:36.757

This code is complite work for change brigtness of android deveice.

Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 20);

    WindowManager.LayoutParams lp = getWindow().getAttributes();
    lp.screenBrightness =0.2f;// 100 / 100.0f;
    getWindow().setAttributes(lp);

    startActivity(new Intent(this,RefreshScreen.class));

Also give below permission to manifest file

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

How to change system brightness?

1 Answers1