HarmonyOS 如何隐藏底部虚拟建，或者计算出高度的方法

尝试方法获取的高度为0:

let height = avoidArea.bottomRect.height

完整代码：

onWindowStageCreate(windowStage: window.WindowStage): void {
  // Main window is created, set main page for this ability
  hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

  let windowClass: window.Window | undefined = undefined;
  windowStage.getMainWindow((err: BusinessError, data) => {
  const errCode: number = err.code;
  if (errCode) {
    console.error(`Failed to obtain the main window. Cause code: ${err.code}, message: ${err.message}`);
    return;
  }
  windowClass = data;
  let type = window.AvoidAreaType.TYPE_SYSTEM;
  try {
  let avoidArea = windowClass.getWindowAvoidArea(type);
  //底部虚拟键盘高度
  let height = avoidArea.bottomRect.height
  AppStorage.setOrCreate<number>('avoidHeight',height);
  console.error(`height: ${height}`);
  } catch (exception) {
    console.error(`Failed to obtain the area. Cause code: ${exception.code}, message: ${exception.message}`);
    AppStorage.setOrCreate<number>('avoidHeight',0);
    }
  });

windowStage.loadContent('pages/Index', (err) => {
  if (err.code) {
    hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
    return;
  }
  hilog.info(0x0000, 'testTag', 'Succeeded in loading the content.');
});