HarmonyOS 鸿蒙Next 保存图片权限请求问题

showAssetsCreationDialog中的srcFileUris应该是应用沙箱的图片/视频uri demo：

import { fileIo as fs, fileUri } from '@kit.CoreFileKit'

import { common } from '@kit.AbilityKit';

import { photoAccessHelper } from '@kit.MediaLibraryKit';

import { camera, cameraPicker as picker } from '@kit.CameraKit';

@Entry

@Component

struct Index {

  @State message: string = 'Hello World';

  async saveFile() {

    let mContext = getContext(this) as common.Context;

    let cameraType: number = 1;

    let types: Array<picker.PickerMediaType> = [picker.PickerMediaType.PHOTO];

    let pickerProfile: picker.PickerProfile = {

      cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK,

      videoDuration: 15

    };

    let pickerResult: picker.PickerResult = await picker.pick(mContext,

      types, pickerProfile);

    if (pickerResult.resultCode === 0) {

      // 成功

      let finalUri = pickerResult.resultUri;

      // 保存图片到缓存目录

      let dirpath = (getContext(this) as common.UIAbilityContext).tempDir + '/cameTem.jpg';

      let dirUri = fileUri.getUriFromPath(dirpath);

      let file = fs.openSync(pickerResult.resultUri, fs.OpenMode.READ_ONLY)

      let file2 = fs.openSync(dirpath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)

      fs.copyFileSync(file.fd, file2.fd)

      fs.closeSync(file);

      fs.closeSync(file2);

      console.info('ImagePicker', "Succeeded in copying. ");

      // 删除相册图片

      try {

        await photoAccessHelper.MediaAssetChangeRequest.deleteAssets(getContext(),

          [pickerResult.resultUri])

        finalUri = dirUri;

      } catch (err) {

        console.error('ImagePicker', `deleteAssetsDemo failed with error: ${err.code}, ${err.message}`);

      }

      console.info('ShowAssetsCreationDialogDemo.');

      try { // 获取需要保存到媒体库的位于应用沙箱的图片/视频uri

        let srcFileUris: Array<string> = [dirUri];

        let photoCreationConfigs: Array<photoAccessHelper.PhotoCreationConfig> = [{

          // title: 'test2', // 可选

          fileNameExtension: 'jpg',

          photoType: photoAccessHelper.PhotoType.IMAGE,

          // subtype: photoAccessHelper.PhotoSubtype.DEFAULT, // 可选

        }];

        let context = getContext();

        let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);

        let desFileUris: Array<string> =

          await phAccessHelper.showAssetsCreationDialog(srcFileUris, photoCreationConfigs);

        console.info('showAssetsCreationDialog success, data is ' + desFileUris);

        try {

          let file = fs.openSync(srcFileUris[0], fs.OpenMode.READ_ONLY)

          let file2 = fs.openSync(desFileUris[0], fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)

          fs.copyFileSync(file.fd, file2.fd)

          fs.closeSync(file);

          fs.closeSync(file2);

        } catch (e) {

          console.log(JSON.stringify(e))

        }

      } catch (err) {

        console.error('showAssetsCreationDialog failed, errCode is ' + err.code + ', errMsg is ' + err.message);

      }

    }

  }

  build() {

    RelativeContainer() {

      Text(this.message)

        .id('HelloWorld')

        .fontSize(50)

        .fontWeight(FontWeight.Bold)

        .alignRules({

          center: { anchor: '__container__', align: VerticalAlign.Center },

          middle: { anchor: '__container__', align: HorizontalAlign.Center }

        })

        .onClick(() => {

          this.saveFile();

        })

    }

    .height('100%')

    .width('100%')

  }

}