单击进度后，程序将显示错误以关闭

Question

单击进度时，程序会显示错误关闭。 Settings.System.putInt（cResolver，Settings.System.SCREEN_BRIGHTNESS，亮度）;

出现以下错误

未被授予此权限：android.permission.WRITE_SETTINGS。 android.os.Parcel.readException上的MainActivity $ 1.onStopTrackingTouch（MainActivity.java:129）android.widget.SeekBar.onStopTrackingTouch

brightbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

            **Settings.System.putInt(cResolver, Settings.System.SCREEN_BRIGHTNESS, brightness);**

            WindowManager.LayoutParams layoutpars = window.getAttributes();

            layoutpars.screenBrightness = brightness / (float)255;

            window.setAttributes(layoutpars);
        }
        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
        }
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {


            if(progress<=20)
            {

                brightness=20;
            }
            else 
            {

                brightness = progress;
            }

            Toast.makeText(getApplication(),"brightness:"+brightness,Toast.LENGTH_LONG).show();

            float perc = (brightness /(float)255)*100;

            txtPerc.setText((int)perc +" %");
        }
    });