added permission check on flutter side

lib/main.dart

@@ -7,6 +7,7 @@ import 'package:aves/widgets/album/all_collection_page.dart';
 import 'package:aves/widgets/common/fake_app_bar.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:permission_handler/permission_handler.dart';
 
 void main() async {
   await settings.init();
@@ -46,6 +47,12 @@ class _HomePageState extends State<HomePage> {
   }
 
   setup() async {
+    final permissions = await PermissionHandler().requestPermissions([PermissionGroup.storage]);
+    if (permissions[PermissionGroup.storage] != PermissionStatus.granted) {
+      SystemNavigator.pop();
+      return;
+    }
+
     await metadataDb.init();
 
     eventChannel.receiveBroadcastStream().cast<Map>().listen(

pubspec.lock

@@ -80,7 +80,7 @@ packages:
       name: google_maps_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.20+1"
+    version: "0.5.20+6"
   intl:
     dependency: "direct main"
     description:
@@ -123,6 +123,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.2"
   photo_view:
     dependency: "direct main"
     description:
@@ -246,7 +253,7 @@ packages:
       name: video_player
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.1+6"
+    version: "0.10.2"
 sdks:
   dart: ">=2.2.2 <3.0.0"
   flutter: ">=1.5.9-pre.94 <2.0.0"

pubspec.yaml

@@ -27,6 +27,7 @@ dependencies:
   google_maps_flutter:
   intl:
   path:
+  permission_handler:
   photo_view:
   screen:
   shared_preferences: