HarmonyOS photoPicker文件读取问题

从photoPicker选择的文件，在读取时报13900002，代码如下：

let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();

PhotoSelectOptions.maxSelectNumber = 1;
let photoPicker = new photoAccessHelper.PhotoViewPicker();
photoPicker.select(PhotoSelectOptions).then((photoSelectResult: photoAccessHelper.PhotoSelectResult) => {
  MLog.info('PhotoViewPicker.select successfully, PhotoSelectResult uri: ' + JSON.stringify(photoSelectResult));
  let fileUri=photoSelectResult.photoUris[0];

  let file = fs.openSync(fileUri);
  let fileName = file.name;
  let stat = fs.lstatSync(file.path);
  let buf = new ArrayBuffer(stat.size)
  fs.readSync(file.fd, buf); // 以同步方法从流文件读取数据。
  fs.fsyncSync(file.fd);
  fs.closeSync(file.fd);
}).catch((err: BusinessError) => {
  MLog.error('PhotoViewPicker.select failed with err: ' + JSON.stringify(err));
});
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