HarmonyOS 沙盒中的图片和视频移动/拷贝到系统相册中

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 
      }); 
    } 
  }

async  imageWriteAlbumExample2(fileUri:string) { 
    console.info('createImageAssetRequestDemo:' + 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.createImageAssetRequest(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 
      }); 
    } 
  }