HarmonyOS 将沙盒路径视频导出至相册

如下方法都可以保存视频到相册，参考一下：

videoWriteAlbumExample(fileUri:
string
)
{
  let titleStr = 'testVideo' + new Date().getTime()
  let context = getContext(this);
  let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);
  console.debug("getPhotoAccessHelper success: ")
  let photoType: photoAccessHelper.PhotoType = photoAccessHelper.PhotoType.VIDEO;
  let extension: string = 'mp4';
  let options: photoAccessHelper.CreateOptions = {
    title: titleStr
  }
  phAccessHelper.createAsset(photoType, extension, options).then(async (uriDes: string) => {
    // 使用uri打开文件，可以持续写入内容，写入过程不受时间限制
    try {
      // 写到媒体库文件中
      let resFile = fs.openSync(fileUri, fs.OpenMode.READ_ONLY)
      let file = fs.openSync(uriDes, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
      // 内容复制到媒体库文件中
      fs.copyFileSync(resFile.fd, file.fd);
      fs.closeSync(file.fd);
      fs.closeSync(resFile.fd);
      //AlertDialog.show({message:'已保存至相册!'});
      promptAction.showToast({
        message: '已保存至相册',
        duration: 2500
      });
    } catch (err) {
      console.error("error is " + JSON.stringify(err))
    }
  })
    .catch((err: Error) => {
      console.error("error is " + JSON.stringify(err))
    });
}

async
videoWriteAlbumExample2(fileUri:
string
)
{
  console.info('createVideoAssetRequestDemo:' + fileUri);
  let context = getContext(this);
  try {
    // 需要确保fileUri对应的资源存在
    let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);
    let assetChangeRequest: photoAccessHelper.MediaAssetChangeRequest =
      photoAccessHelper.MediaAssetChangeRequest.createVideoAssetRequest(context, fileUri);
    await phAccessHelper.applyChanges(assetChangeRequest);
    console.info('apply createVideoAssetRequest successfully');
    promptAction.showToast({
      message: '已保存至相册',
      duration: 2500
    });
  } catch (err) {
    console.error(`createVideoAssetRequestDemo failed with error: ${err.code}, ${err.message}`);
    promptAction.showToast({
      message: '保存失败',
      duration: 2000
    });
  }
}
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