與系統的亮度沒有關聯
若要調整系統亮度的寫法
因需要系統權限,app需sign key
則會另開一篇文章分享
//=====================================
螢幕亮度的值為0-255
import android.view.WindowManager;
private void setBrightnessLevel(final int brightness_level) {
 WindowManager.LayoutParams lp = getWindow().getAttributes();
 lp.screenBrightness = Float.valueOf((brightness_level) * (1f / 255f));
 getWindow().setAttributes(lp);
}

