Question

有没有办法获得最低显示亮度值。假设从设置我将displaybrightnessseckbar设置为0.但是android系统不会将系统亮度值设为0，而是将其设置为最小显示亮度值。此最小显示亮度值因设备而异。我怎样才能得到这个值

Answer 1

您可以使用 BRIGHTNESS_OVERRIDE_OFF （来自文档：表示当此窗口位于此窗口时，屏幕或按钮背光亮度应设置为最低值。）

Window win = getWindow();
WindowManager.LayoutParams winParams = win.getAttributes();

winParams.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF;

win.setAttributes(winParams);

现在您可以调用getAtributes并查看Device设置的值。

Answer 2

public static int getMinimumScreenBrightnessSetting (Context context) {
  final Resources res = Resources.getSystem();
  int id = res.getIdentifier("config_screenBrightnessSettingMinimum", "integer", "android"); // API17+
  if (id == 0)
    id = res.getIdentifier("config_screenBrightnessDim", "integer", "android"); // lower API levels
  if (id != 0) {
    try {
      return res.getInteger(id);
    }
    catch (Resources.NotFoundException e) {
      // ignore
    }
  }
  return 0;
}

public static int getMaximumScreenBrightnessSetting (Context context) {
  final Resources res = Resources.getSystem();
  final int id = res.getIdentifier("config_screenBrightnessSettingMaximum", "integer", "android");  // API17+
  if (id != 0) {
    try {
      return res.getInteger(id);
    }
    catch (Resources.NotFoundException e) {
      // ignore
    }
  }
  return 255;
}

获得最小显示亮度

2 个答案: