HarmonyOS photoAccessHelper 获取的图片资源无法获取图像宽高

selectImageFromAlbum() { 
  // 配置相册选择选项 
  const photoSelectOptions = new picker.PhotoSelectOptions(); 
  // 选择类型 
  photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE; 
  // 最大数量 
  photoSelectOptions.maxSelectNumber = 1; 
  let uris: Array<string> = []; 
  const photoViewPicker = new picker.PhotoViewPicker(); 
  photoViewPicker.select(photoSelectOptions).then((photoSelectResult: picker.PhotoSelectResult) => { 
    uris = photoSelectResult.photoUris; 
    if (uris.length <= 0) { 
      return 
    } 
    let uri: string = uris[0] 
    this.getImageFromUri(uri).then(async (pixelMap: PixelMap) => { 
      // some logic code 
    }) 
  }) 
} 
 
async getImageFromUri(uri: string): Promise<image.PixelMap> { 
  let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(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', uri); 
  let fetchOption: photoAccessHelper.FetchOptions = { 
    fetchColumns: [], 
    predicates: predicates 
  }; 
  let fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.PhotoAsset> = await phAccessHelper.getAssets(fetchOption); 
  const asset: photoAccessHelper.PhotoAsset = await fetchResult.getFirstObject(); 
  // FIXME: 当前获取不到图片宽高，导致 getThumbnail 获取缩略图是图像被截断 
  // console.log(`image size: ${asset.get(photoAccessHelper.PhotoKeys.WIDTH)} ${asset.get(photoAccessHelper.PhotoKeys.HEIGHT)}`); 
  const size : image.Size = { // 传个大值，再压缩，默认是缩略值256 
    height: 10000, 
    width: 10000 
  } 
  fetchResult.close() 
  try { 
  return asset.getThumbnail(size); 
} catch (e) { 
  return asset.getThumbnail(); 
} 
}