Android development realizes the function of adjusting screen brightness

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

/**
 * Determine whether automatic brightness adjustment is turned on
 */
public static boolean isAutoBrightness(Context context) {
  ContentResolver resolver = ();
  boolean automicBrightness = false;
  try {
   automicBrightness = (resolver,
     .SCREEN_BRIGHTNESS_MODE) == .SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
  } catch ( e) {
   ();
  }
  return automicBrightness;
}
/**
 * Get the brightness of the screen
 */
public static int getScreenBrightness(Context context) {
  int nowBrightnessValue = 0;
  ContentResolver resolver = ();
  try {
   nowBrightnessValue = (resolver, .SCREEN_BRIGHTNESS);
  } catch (Exception e) {
   ();
  }
  return nowBrightnessValue;
}
/**
 * Set the brightness when the current activity is displayed
 * The maximum screen brightness value is generally 255, and each phone is different
 * The value range of screenBrightness is between [0,1]
 */
public static void setBrightness(Activity activity, int brightness) {
   lp = ().getAttributes();
   = (brightness) * (1f / 255f);
  ().setAttributes(lp);
}
/**
 * Turn on and off automatic brightness adjustment
 */
public static boolean autoBrightness(Context activity, boolean flag) {
  int value = 0;
  if (flag) {
   value = .SCREEN_BRIGHTNESS_MODE_AUTOMATIC; //Open  } else {
   value = .SCREEN_BRIGHTNESS_MODE_MANUAL;//closure  }
  return ((),
    .SCREEN_BRIGHTNESS_MODE,
    value);
}
/**
 * Save the brightness setting status, and exit the app can also maintain the setting status
 */
public static void saveBrightness(Context context, int brightness) {
  ContentResolver resolver = ();
  Uri uri = (.SCREEN_BRIGHTNESS);
  (resolver, .SCREEN_BRIGHTNESS, brightness);
  (uri, null);
}