Flutter/Dart - Open a view after a delay
88,085
Solution 1
You can do it in 2 ways:
-
Using
Timerclass.import 'dart:async'; // Go to Page2 after 5s. Timer(Duration(seconds: 5), () { Navigator.push(context, MaterialPageRoute(builder: (_) => Screen2())); }); -
Using
Future.delayedclass:// Go to Page2 after 5s. Future.delayed(Duration(seconds: 5), () { Navigator.push(context, MaterialPageRoute(builder: (_) => Screen2())); });
The benefit of using Timer over Future is its ability to cancel.
Solution 2
To open a view after some delay you can use Future.delayed:
Future.delayed(const Duration(milliseconds: 500), () {
setState(() {
// Here you can write your code for open new view
});
});
Hope it will help you out.
Solution 3
Use Future.delay constructor from dart:async library, the following code navigate from first page to second page after 3 seconds of clicking the RaisedButton, I do not understand why are you pushing a loading view ?
import 'dart:async';
class FirstView extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new Scaffold(
body: new Center(
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
new Text("FIRST VIEW"),
new RaisedButton(
onPressed: () async {
await new Future.delayed(const Duration(seconds: 3));
Navigator.push(context, new MaterialPageRoute(builder: (__) => new SecondView()));
},
child: new Text("Go to 2nd view"),
)
],
),
),
);
}
}
class SecondView extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new Scaffold(
body: new Center(
child: new Text("SECOND VIEW"),
),
);
}
}
Solution 4
You can use like this;
Future myFuture() async {
await new Future.delayed(new Duration(seconds: 3));
//return your_main_future_code_here;
}
Author by
Tiziano Gioè
Updated on January 24, 2022Comments
-
Tiziano Gioè over 2 years
I'm trying to find a solution to open a view after a delay in a loading view. I have a View, in which there is a button and when I press it, the
onPressed()method triggers aNavigator.of(Context).pushNamed("/loading"). which opens the loading view. In the loading view I have then a function to make a delay of 1.5 sec and then open the home view, this is the code:Future delay() async{ await new Future.delayed(new Duration(milliseconds: 1500), () { Navigator.of(context).pushNamed("/home"); }However, when the delay starts, after 1.5 sec, it opens the Home view, but with this exception:
I/flutter ( 5226): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ I/flutter ( 5226): The following assertion was thrown building IconTheme(color: Color(0xff000000)): I/flutter ( 5226): Multiple widgets used the same GlobalKey. I/flutter ( 5226): The key [LabeledGlobalKey<ScaffoldState>#a0051] was used by multiple widgets. The parents of those I/flutter ( 5226): widgets were different widgets that both had the following description: I/flutter ( 5226): IconTheme(color: Color(0xff000000)) I/flutter ( 5226): A GlobalKey can only be specified on one widget at a time in the widget tree. I/flutter ( 5226): When the exception was thrown, this was the stack: I/flutter ( 5226): #0 GlobalKey._debugReserveFor.<anonymous closure> (package:flutter/src/widgets/framework.dart:172:9) I/flutter ( 5226): #1 GlobalKey._debugReserveFor (package:flutter/src/widgets/framework.dart:182:6) I/flutter ( 5226): #2 Element.updateChild.<anonymous closure> (package:flutter/src/widgets/framework.dart:2649:13) I/flutter ( 5226): #3 Element.updateChild (package:flutter/src/widgets/framework.dart:2652:6) I/flutter ( 5226): #4 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #5 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #6 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #8 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #9 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #10 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #11 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #12 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #13 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #15 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #16 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #17 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #18 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #19 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #21 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #22 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #23 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #24 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #25 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #26 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #27 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #28 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #29 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #30 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #31 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #32 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3893:16) I/flutter ( 5226): #33 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #34 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4693:32) I/flutter ( 5226): #35 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #36 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #37 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #38 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #39 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #40 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #41 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #42 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #43 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #44 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #45 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #46 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #47 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #48 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #49 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #50 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #51 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #52 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #53 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #54 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #55 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #56 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #57 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #58 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #59 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #60 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #61 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #62 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #63 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #64 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #65 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #66 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #67 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #68 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #69 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #70 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #71 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #72 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #73 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #74 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #75 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #76 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #77 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #78 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #79 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #80 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #81 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #82 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #83 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #84 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #85 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #86 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #87 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #88 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #89 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #90 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #91 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #92 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #93 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #94 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #95 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #96 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #97 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #98 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #99 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #100 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #101 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #102 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #103 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #104 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #105 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #106 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #107 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #108 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #109 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #110 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #111 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #112 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #113 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #114 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #115 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #116 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #117 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #118 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #119 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #120 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #121 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #122 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #123 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #124 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #125 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #126 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #127 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #128 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #129 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #130 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #131 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #132 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #133 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #134 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #135 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #136 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #137 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #138 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #139 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #140 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #141 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #142 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #143 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #144 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #145 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) E/flutter ( 5226): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception: E/flutter ( 5226): NoSuchMethodError: The method 'ancestorStateOfType' was called on null. E/flutter ( 5226): Receiver: null E/flutter ( 5226): Tried calling: ancestorStateOfType(Instance of 'TypeMatcher<NavigatorState>') E/flutter ( 5226): #0 Object.noSuchMethod (dart:core-patch/dart:core/object_patch.dart:46) E/flutter ( 5226): #1 Navigator.of (package:flutter/src/widgets/navigator.dart:722:19) E/flutter ( 5226): #2 Navigator.pushReplacementNamed (package:flutter/src/widgets/navigator.dart:666:22) E/flutter ( 5226): #3 switcher (package:ticketing/router.dart:53:13) E/flutter ( 5226): #4 _LoadingViewState.switchView (/data/user/0/com.tiziano.flutterapp.flutterapp2/cache/ticketing_remasteredAHSWSC/ticketing_remastered/lib/view/loadingview/LoadingView.dart:79:3) E/flutter ( 5226): #5 _LoadingViewState.delay.<anonymous closure> (/data/user/0/com.tiziano.flutterapp.flutterapp2/cache/ticketing_remasteredAHSWSC/ticketing_remastered/lib/view/loadingview/LoadingView.dart:74:70) E/flutter ( 5226): #6 new Future.delayed.<anonymous closure> (dart:async/future.dart:310) E/flutter ( 5226): #7 Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21) E/flutter ( 5226): #8 _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:367) E/flutter ( 5226): #9 _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:401) E/flutter ( 5226): #10 _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:164) I/flutter ( 5226): #146 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #147 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #148 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4588:14) I/flutter ( 5226): #149 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #150 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #151 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #152 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #153 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #154 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #155 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #156 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #157 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #158 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #159 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #160 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #161 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #162 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #163 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #164 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #165 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #166 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #167 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3582:5) I/flutter ( 5226): #168 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3718:22) I/flutter ( 5226): #169 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3577:5) I/flutter ( 5226): #170 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2875:14) I/flutter ( 5226): #171 Element.updateChild (package:flutter/src/widgets/framework.dart:2678:12) I/flutter ( 5226): #172 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4375:32) I/flutter ( 5226): #173 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4703:17) I/flutter ( 5226): #174 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #175 _TheatreElement.update (package:flutter/src/widgets/overlay.dart:507:16) I/flutter ( 5226): #176 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #177 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #178 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #179 StatefulElement.update (package:flutter/src/widgets/framework.dart:3737:5) I/flutter ( 5226): #180 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #181 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #182 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #183 ProxyElement.update (package:flutter/src/widgets/framework.dart:3847:5) I/flutter ( 5226): #184 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #185 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4595:14) I/flutter ( 5226): #186 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #187 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #188 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #189 StatefulElement.update (package:flutter/src/widgets/framework.dart:3737:5) I/flutter ( 5226): #190 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #191 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4595:14) I/flutter ( 5226): #192 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #193 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4595:14) I/flutter ( 5226): #194 Element.updateChild (package:flutter/src/widgets/framework.dart:2667:15) I/flutter ( 5226): #195 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3613:16) I/flutter ( 5226): #196 Element.rebuild (package:flutter/src/widgets/framework.dart:3463:5) I/flutter ( 5226): #197 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2210:33) I/flutter ( 5226): #198 BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:621:20) I/flutter ( 5226): #199 BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:208:5) I/flutter ( 5226): #200 BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15) I/flutter ( 5226): #201 BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9) I/flutter ( 5226): #202 BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:842:5) I/flutter ( 5226): #203 _invoke (file:///b/build/slave/Linux_Engine/build/src/flutter/lib/ui/hooks.dart:120) I/flutter ( 5226): #204 _drawFrame (file:///b/build/slave/Linux_Engine/build/src/flutter/lib/ui/hooks.dart:109) I/flutter ( 5226): ════════════════════════════════════════════════════════════════════════════════════════════════════ I/flutter ( 5226): Another exception was thrown: Multiple widgets used the same GlobalKey.By the way, in the Home View there aren't any black icons. (IconTheme(color: Color(0xff000000)) Can someone help?