HarmonyOS 鸿蒙Next能否提供一个选择相册图片或者拍照并上传到服务端的demo

参考下：

selectPicture() {
  try {
    let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
    PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
    PhotoSelectOptions.maxSelectNumber = 1;
    let photoPicker = new photoAccessHelper.PhotoViewPicker();
    photoPicker.select(PhotoSelectOptions).then((PhotoSelectResult: photoAccessHelper.PhotoSelectResult) => {
      console.info('==SY==PhotoViewPicker.select successfully, PhotoSelectResult uri: ' +
      JSON.stringify(PhotoSelectResult.photoUris));
      this.uploadImage(PhotoSelectResult.photoUris[0])
    }).catch((err: BusinessError) => {
      console.error(`PhotoViewPicker.select failed with err: ${err.code}, ${err.message}`);
    });
  } catch (error) {
    let err: BusinessError = error as BusinessError;
    console.error(`PhotoViewPicker failed with err: ${err.code}, ${err.message}`);
  }
}

uploadImage(uri:string){
  const resFile = fs.openSync(uri, fs.OpenMode.READ_ONLY)
  let newPath = `${getContext().cacheDir}/${resFile.name}`;
  fs.copyFileSync(resFile.fd, newPath)
  console.info('uri = ' + uri, 'newPath = ' + newPath)
  let files: Array<request.File> = [
    {
      filename: resFile.name,
      name: 'file',
      uri: `internal://cache/${resFile.name}`,
      type: 'image/png'
    }
  ]
  let header = new Map<Object, string>()
  let uploadConfig: request.UploadConfig = {
    url: 'http://xxxx',
    header: header,
    method: 'POST',
    files: files,
    data: []
  };
  try {
    request.uploadFile(getContext(), uploadConfig).then((data: request.UploadTask) => {
      console.error('uploadFile')
      console.error(`${JSON.stringify(data)}`)
      data.on('complete', (taskStates: Array<request.TaskState>) => {
        console.info(`upload complete taskState: ${JSON.stringify(taskStates[0])}`);
      });
      data.on('headerReceive', (headers: object) => {
        console.info("upOnHeader headers:" + JSON.stringify(headers));
      })
      data.on('fail', (taskStates: Array<request.TaskState>) => {
        for (let i = 0; i < taskStates.length; i++) {
          console.info("upOnFail taskState:" + JSON.stringify(taskStates[i]));
        }
      })
    }).catch((err: BusinessError) => {
      console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
    });
  } catch (err) {
    console.error(`Failed to request the upload. err: ${JSON.stringify(err)}`);
  }
}