HarmonyOS webview下载图片到手机相册，相册路径是多少？

保存相册需要申请ACL权限，详见：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/photoaccesshelper-preparation-V5#申请相册管理模块功能相关权限

关于相册路径可以参考如下代码：

func async saveImage(buffer: ArrayBuffer | string): Promise<void> {
  let context = getContext(this) as common.UIAbilityContext;
  let helper = photoAccessHelper.getPhotoAccessHelper(context);
  let uri = await helper.createAsset(photoAccessHelper.PhotoType.IMAGE, 'jpg');
  let file = await fs.open(uri, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
  await fs.write(file.fd, buffer);
  await fs.close(file.fd);
}

若是download目录，若是沙箱download目录则不需要授权。路径获取：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-file-environment-V5#environmentgetuserdownloaddir11

import { BusinessError } from '@ohos.base';
function getUserDownloadDirExample() {
  try {
    let path = environment.getUserDownloadDir();
    console.log(`success to getUserDownloadDir: ${JSON.stringify(path)}`);
  } catch (error) {
    console.error(`failed to getUserDownloadDir because: ${JSON.stringify(error)}`);
  }
}