vivo下架，因为在下载隐私政策请求存储权限

@@ -137,7 +137,7 @@ class _WebPageState extends State<WebPage> {
     // await FlutterDownloader.initialize(
     //     debug: true // optional: set false to disable printing logs to console
     //     );
-    await Permission.storage.request();
+    // await Permission.storage.request();
   }
 
   @override