Skip to content

Instantly share code, notes, and snippets.

@av
Created August 14, 2019 12:34
Show Gist options
  • Save av/abea7bb4eb227cde4719490f59d83fe9 to your computer and use it in GitHub Desktop.
Save av/abea7bb4eb227cde4719490f59d83fe9 to your computer and use it in GitHub Desktop.
Async app init
// ...
class _RootState extends State<RootWidget> {
TenderApiProvider tenderApi = TenderApiProvider();
AppState state = AppState();
Future init() async {
return Future.wait(<Future>[
tenderApi.init(), // fetch and store token
Future.delayed(const Duration(milliseconds: 2000)) // Let user see the splash for couple of seconds
]);
}
@override
Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider(builder: (_) => tenderApi),
ChangeNotifierProvider(builder: (_) => state),
],
child: MaterialApp(title: "My App"),
routes: <String, WidgetBuilder>{
'/': _buildLoading
},
),
);
}
Widget _buildLoading(BuildContext context) {
return FutureBuilder(
future: init(),
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.hasData) {
// All good, show user actual home screen
return HomeScreen();
} else if (snapshot.hasError) {
// Application probably won't run as expected
// as init has failed.
return ErrorScreen();
}
return LoadingScreen();
},
);
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment