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

/*** 判斷是否開啟了自動亮度調節*/public static boolean isAutoBrightness(Context context) {  ContentResolver resolver = context.getContentResolver();  boolean automicBrightness = false;  try {   automicBrightness = Settings.System.getInt(resolver,     Settings.System.SCREEN_BRIGHTNESS_MODE) == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;  } catch (Settings.SettingNotFoundException e) {   e.printStackTrace();  }  return automicBrightness;}/*** 獲取屏幕的亮度*/public static int getScreenBrightness(Context context) {  int nowBrightnessValue = 0;  ContentResolver resolver = context.getContentResolver();  try {   nowBrightnessValue = android.provider.Settings.System.getInt(resolver, Settings.System.SCREEN_BRIGHTNESS);  } catch (Exception e) {   e.printStackTrace();  }  return nowBrightnessValue;}/*** 設置當前Activity顯示時的亮度* 屏幕亮度最大數值一般為255，各款手機有所不同* screenBrightness 的取值范圍在[0,1]之間*/public static void setBrightness(Activity activity, int brightness) {  WindowManager.LayoutParams lp = activity.getWindow().getAttributes();  lp.screenBrightness = Float.valueOf(brightness) * (1f / 255f);  activity.getWindow().setAttributes(lp);}/*** 開啟關閉自動亮度調節*/public static boolean autoBrightness(Context activity, boolean flag) {  int value = 0;  if (flag) {   value = Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC; //開啟  } else {   value = Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;//關閉  }  return Settings.System.putInt(activity.getContentResolver(),    Settings.System.SCREEN_BRIGHTNESS_MODE,    value);}/*** 保存亮度設置狀態，退出app也能保持設置狀態*/public static void saveBrightness(Context context, int brightness) {  ContentResolver resolver = context.getContentResolver();  Uri uri = android.provider.Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS);  android.provider.Settings.System.putInt(resolver, Settings.System.SCREEN_BRIGHTNESS, brightness);  resolver.notifyChange(uri, null);}