package com.ngxu.videoplayer;
 import android.os.Build;

 import android.app.Activity;
 import java.lang.ref.WeakReference;
 import android.view.View; 

import android.view.WindowManager;
import android.view.Window;

public class SetAppBrightness {

private static WeakReference<Activity> mActivity;
public static void goSetAppBrightness(Activity activity, final float brightnessPercent)
{

        mActivity=new WeakReference<Activity>(activity);

        if (activity == null) {
            if (mActivity == null) {
                return;
            }
            activity = mActivity.get();
        }

        if (activity == null) return;

        final Activity _activity = activity;
       
        _activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
Window window =  _activity.getWindow();
    WindowManager.LayoutParams layoutParams = window.getAttributes();
    layoutParams.screenBrightness = brightnessPercent;
    window.setAttributes(layoutParams);
            }
    });
}

}