HarmonyOS 鸿蒙Next非系统应用是否无权读取相册图片？使用filePicker仅能选择本地沙盒目录图片

该demo可以读取到相册的图片并转化为解码成PixelMap，你看是否满足需求

import photoAccessHelper from '@ohos.file.photoAccessHelper';
import image from '@ohos.multimedia.image';
import fs from '@ohos.file.fs';

@Entry
@Component
struct Photo {
  @State message: string = 'Hello World';
  @State getAlbum: string = '显示相册中的图片';
  @State pixel: image.PixelMap | undefined = undefined;
  @State albumPath: string = '';
  @State photoSize: number = 0;

  async getPictureFromAlbum(){
     let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
     PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
     PhotoSelectOptions.maxSelectNumber = 1;
     let photoPicker = new photoAccessHelper.PhotoViewPicker();
     let photoSelectResult: photoAccessHelper.PhotoSelectResult = await photoPicker.select(PhotoSelectOptions);
     this.albumPath = photoSelectResult.photoUris[0]; // 读取图片为buffer
     const file = fs.openSync(this.albumPath, fs.OpenMode.READ_WRITE);
     this.photoSize = fs.statSync(file.fd).size; console.info('Photo Size: ' + this.photoSize);
     let buffer = new ArrayBuffer(this.photoSize);
     fs.readSync(file.fd, buffer);
     fs.closeSync(file); // 解码成PixelMap
     const imageSource = image.createImageSource(buffer);
     console.log('imageSource: ' + JSON.stringify(imageSource));
     this.pixel = await imageSource.createPixelMap({});
  }

  build() {
    RelativeContainer() {
      Text(this.message)
        .id('PhotoHelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .alignRules({
          center: { anchor: '__container__', align: VerticalAlign.Center },
          middle: { anchor: '__container__', align: HorizontalAlign.Center }
        })
      Button('xxx').onClick(() =>{
        this.getPictureFromAlbum()
      })

    }
    .height('100%')
    .width('100%')
  }
}