HarmonyOS 相册选的图片 用fs读不到信息 报错13900002

selectPhoto() { 
  const photoSelectOptions = new picker.PhotoSelectOptions(); 
  const photoViewPicker = new picker.PhotoViewPicker(); 
  photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE; // 过滤选择媒体文件类型为IMAGE 
  photoSelectOptions.maxSelectNumber = 1; // 选择媒体文件的最大数目 
  photoViewPicker.select(photoSelectOptions).then((photoSelectResult: picker.PhotoSelectResult) => { 
    const fileUri = photoSelectResult.photoUris[0] 
    this.getFileInfo(fileUri) 
  }).catch((err: BusinessError) => { 
    console.error(`Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}`); 
  }) 
} 
async getFileInfo(filePathString: string) { 
  try { 
    let uri = fileUri.getUriFromPath(filePathString) 
    let fileUriObject = new fileUri.FileUri(uri); 
    let filename = fileUriObject.name 
    let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(this.context); 
    let predicates: dataSharePredicates.DataSharePredicates = new dataSharePredicates.DataSharePredicates(); 
    // 配置查询条件，使用PhotoViewPicker选择图片返回的uri进行查询 
    predicates.equalTo('uri', filePathString) 
    let fetchOption: photoAccessHelper.FetchOptions = { 
      fetchColumns: [], 
      predicates: predicates 
    }; 
    let fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.PhotoAsset> = await phAccessHelper.getAssets(fetchOption) 
    // 得到uri对应的PhotoAsset对象，读取文件的部分信息 
    const asset: photoAccessHelper.PhotoAsset = await fetchResult.getFirstObject(); 
    let logString = `filename：${filename} fileSize：${asset.get(photoAccessHelper.PhotoKeys.SIZE)}` 
    console.log(logString) 
    let resFile = fs.openSync(filePathString, fs.OpenMode.READ_ONLY) 
    console.log('文件信息：' + 'fd:' + resFile.fd + '; ' + 'path:' + resFile.path + '; ' + 'name:' + resFile.name); 
  } catch (e) { 
    console.error(e) 
  } 
}