HarmonyOS 怎么判断设备开启了自由多窗模式

参考如下方式：

let taskContext = GlobalContext.getContext().getObject(CommonConstants.taskContext) as common.UIAbilityContext;
settings.getValue(taskContext, 'window_pcmode_switch_status', settings.domainName.USER_PROPERTY, (err, value) => {
  if (err) {
    Log.showError(TAG, 'get settings value failed! ' + JSON.stringify(err));
    return;
  }
  Log.showInfo(TAG, 'IS_FREE_WINDOW_ENABLE value is ' + value);
});
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监听：

let taskContext = GlobalContext.getContext().getObject(CommonConstants.taskContext) as common.UIAbilityContext;
let res: boolean = settings.registerKeyObserver(taskContext, 'window_pcmode_switch_status', settings.domainName.USER_PROPERTY, () => { // 'IS_FREE_WINDOW_ENABLE'
  settings.getValue(taskContext, 'window_pcmode_switch_status', settings.domainName.USER_PROPERTY, (err, value) => {
    if (err) {
      Log.showError(TAG, 'get settings value failed! ' + JSON.stringify(err));
      return;
    }
    Log.showInfo(TAG, 'window_pcmode_switch_status value is ' + value);
  });
});

Log.showInfo(TAG, `registerKeyObserver result -> ${res}`);
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