fix: move fetch to next tick to get context

lib/main.dart

@@ -86,11 +86,7 @@ class _HomeState extends State<Home> {
       case ThemeMap.cupertino:
         return CupertinoApp(
           home: CupertinoTheme(
-            data: CupertinoThemeData(
-                // brightness: Brightness.dark,
-                // barBackgroundColor: Color.fromRGBO(0x24, 0x29, 0x2e, 1),
-                // primaryColor: Color(0xff24292e),
-                ),
+            data: CupertinoThemeData(),
             child: CupertinoTabScaffold(
               tabBar: CupertinoTabBar(items: _buildNavigationItems()),
               tabBuilder: (context, index) {
@@ -103,9 +99,7 @@ class _HomeState extends State<Home> {
         );
       default:
         return MaterialApp(
-          theme: ThemeData(
-              // primaryColor: Colors.black87,
-              ),
+          theme: ThemeData(),
           home: Scaffold(
             // appBar: AppBar(title: Text('Home')),
             body: _buildScreen(active),

lib/providers/settings.dart

@@ -148,7 +148,7 @@ class _SettingsProviderState extends State<SettingsProvider> {
     } else if (Platform.isIOS) {
       theme = ThemeMap.cupertino;
     }
-    theme = ThemeMap.material;
+    // theme = ThemeMap.material;
 
     setState(() {
       ready = true;

lib/screens/login.dart

@@ -13,30 +13,33 @@ class _LoginScreenState extends State<LoginScreen> {
   Widget build(BuildContext context) {
     var settings = SettingsProvider.of(context);
 
-    List<Widget> children =
-        settings.githubAccountMap.entries.map<Widget>((entry) {
-      return RaisedButton(
-        child: Text(entry.key),
-        onPressed: () {
-          settings.setActiveAccount(entry.key);
-        },
-      );
-    }).toList();
-
-    children.add(RaisedButton(
-      child: Text('Login'),
-      onPressed: () {
-        var state = settings.generateRandomString();
-        launch(
-          'https://github.com/login/oauth/authorize?client_id=$clientId&redirect_uri=gittouch://login&scope=user%20repo&state=$state',
-          forceSafariVC: false, // this makes URL Scheme work
-        );
-      },
-    ));
-
     return MaterialApp(
       home: Scaffold(
-        body: Center(child: Column(children: children)),
+        body: Container(
+          padding: EdgeInsets.only(top: 200),
+          child: Column(
+            children: settings.githubAccountMap.entries.map<Widget>((entry) {
+              return RaisedButton(
+                child: Text(entry.key),
+                onPressed: () {
+                  settings.setActiveAccount(entry.key);
+                },
+              );
+            }).toList()
+              ..add(
+                RaisedButton(
+                  child: Text('Login'),
+                  onPressed: () {
+                    var state = settings.generateRandomString();
+                    launch(
+                      'https://github.com/login/oauth/authorize?client_id=$clientId&redirect_uri=gittouch://login&scope=user%20repo&state=$state',
+                      forceSafariVC: false, // this makes URL Scheme work
+                    );
+                  },
+                ),
+              ),
+          ),
+        ),
       ),
     );
   }

lib/screens/notifications.dart

@@ -32,13 +32,13 @@ class NotificationScreen extends StatefulWidget {
 
 class NotificationScreenState extends State<NotificationScreen> {
   int active = 0;
-  bool loading;
+  bool loading = true;
   Map<String, NotificationGroup> groupMap = {};
 
   @override
   void initState() {
     super.initState();
-    _refresh();
+    nextTick(_onSwitchTab);
   }
 
   Future<Map<String, NotificationGroup>> fetchNotifications(int index) async {
@@ -128,7 +128,7 @@ $key: pullRequest(number: ${item.number}) {
               beforeRedirect: () async {
                 await SettingsProvider.of(context)
                     .putWithCredentials('/repos/$repo/notifications');
-                await _refresh();
+                await _onSwitchTab();
               },
               child: Icon(
                 Octicons.check,
@@ -171,10 +171,6 @@ $key: pullRequest(number: ${item.number}) {
     }
   }
 
-  Future<void> _refresh() async {
-    await _onSwitchTab(active);
-  }
-
   var textMap = {
     0: 'Unread',
     1: 'Paticipating',
@@ -204,7 +200,7 @@ $key: pullRequest(number: ${item.number}) {
     var value = await showConfirm(context, 'Mark all as read?');
     if (value) {
       await SettingsProvider.of(context).putWithCredentials('/notifications');
-      await _refresh();
+      await _onSwitchTab();
     }
   }
 
@@ -244,7 +240,7 @@ $key: pullRequest(number: ${item.number}) {
           onPressed: _confirm,
         )
       ],
-      onRefresh: _refresh,
+      onRefresh: _onSwitchTab,
       loading: loading,
       bodyBuilder: () {
         return Column(

lib/screens/repo.dart

@@ -8,6 +8,7 @@ import '../widgets/repo_item.dart';
 import '../widgets/entry_item.dart';
 import '../screens/issues.dart';
 import '../screens/pull_requests.dart';
+import '../utils/utils.dart';
 
 class RepoScreen extends StatefulWidget {
   final String owner;
@@ -22,12 +23,12 @@ class RepoScreen extends StatefulWidget {
 class _RepoScreenState extends State<RepoScreen> {
   Map<String, dynamic> payload;
   String readme;
-  bool loading;
+  bool loading = true;
 
   @override
   void initState() {
     super.initState();
-    _refresh();
+    nextTick(_refresh);
   }
 
   Future queryRepo(BuildContext context) async {

lib/screens/user.dart

@@ -42,13 +42,13 @@ class UserScreen extends StatefulWidget {
 }
 
 class _UserScreenState extends State<UserScreen> {
-  bool loading;
+  bool loading = true;
   Map<String, dynamic> payload = {};
 
   @override
   void initState() {
     super.initState();
-    _refresh();
+    nextTick(_refresh);
   }
 
   Future queryUser(BuildContext context) async {

lib/utils/utils.dart

@@ -18,6 +18,12 @@ Color convertColor(String cssHex) {
   return Color(int.parse('ff' + cssHex, radix: 16));
 }
 
+void nextTick(Function callback) {
+  Future.delayed(Duration(seconds: 0)).then((_) {
+    callback();
+  });
+}
+
 class Option<T> {
   final T value;
   final Widget widget;
@@ -120,7 +126,7 @@ TextSpan createLinkSpan(BuildContext context, String text, Function handle) {
   return TextSpan(
     text: text,
     style: TextStyle(
-      color: Color(0xff0366d6),
+      color: Colors.black87,
       fontWeight: FontWeight.w600,
       // decoration: TextDecoration.underline,
     ),