Initial Route if user is logged Flutter - flutter

Question

I have created a Future to know if the user is logged, but the initial route isn't save. Then I recive this route in the Initial Route of my material app.
void main() async{
WidgetsFlutterBinding.ensureInitialized();
await UserProvider().isUserLoggedIn();
runApp(MiRoulotte());
}
class MiRoulotte extends StatelessWidget {
final _userProvider = UserProvider();
...
initialRoute: _userProvider.initialRoute,
routes: {
'InitialPage': (BuildContext context) => InitialPage(),
'SignIn': (BuildContext context) => SignInPage(),
'SignUp': (BuildContext context) => SignUpPage(),
'EditProfile': (BuildContext context) => EditProfilePage()
},
)
);
}
}
Future isUserLoggedIn() async{
var user = await _firebaseAuth.currentUser();
if(user != null){
try{
this._currentUser = await getUser(user.uid);
this._initialRoute = 'InitialPage';
}catch(error){
this._initialRoute = 'SignIn';
}
} else{
this._initialRoute = 'SignIn';
}
}
}
photo

Answer 1

You are creating two different instances of UserProvider, that's the problem. You assign the _initialRoute on the first one, but then create a second one which i't assigned.
If you are using Provider, you should use the same instance for that tree and then get it retrieve it through a Consumer for example. Replace your main with:
void main() async{
WidgetsFlutterBinding.ensureInitialized();
UserProvider userProvider = UserProvider();
await userProvider.isUserLoggedIn();
runApp(
Provider<UserProvider>(
create: (_) => userProvider,
builder: (BuildContext context, Widget child) => child,
child: MiRoulotte()),
),
);
}
And then your MiRoulotte fetch it in your build method using a Consumer widget or explicit variable assign:
UserProvider _userProvider = Provider.of<UserProvider>(context, listen: false);
This way you ensure that you are using always the same instance.