I am trying to change screen on push button. But somehow the context has no Navigator as the error suggests:
Navigator operation requested with a context that does not include a Navigator. The context used to push or pop routes from the Navigator must be that of a widget that is a descendant of a Navigator widget. When the exception was thrown, this was the stack: #0 Navigator.of.<anonymous closure> (package:flutter/src/widgets/navigator.dart:2554:9) #1 Navigator.of (package:flutter/src/widgets/navigator.dart:2561:6) #2 _MyAppState.build.<anonymous closure>.<anonymous closure> (package:base_app/main.dart:64:35) #3 _InkResponseState.handleTap (package:flutter/src/material/ink_well.dart:1072:21) #4 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:253:24) #5 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:627:11) #6 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:306:5) #7 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:239:7) However, according to this message there is a Navigator in #0 and #1 so what is the problem?
Mycode:
import 'package:amplify_auth_cognito/amplify_auth_cognito.dart'; import 'package:amplify_authenticator/amplify_authenticator.dart'; import 'package:amplify_flutter/amplify_flutter.dart'; import 'package:flutter/material.dart'; import 'package:base_app/add_device.dart'; import 'amplifyconfiguration.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatefulWidget { const MyApp({Key? key}) : super(key: key); @override State<MyApp> createState() => _MyAppState(); } class _MyAppState extends State<MyApp> { bool _isAmplifyConfigured = false; @override void initState() { super.initState(); _configureAmplify(); } void _configureAmplify() async { try { await Amplify.addPlugin(AmplifyAuthCognito()); await Amplify.configure(amplifyconfig); setState(() => _isAmplifyConfigured = true); print('Successfully configured'); } on Exception catch (e) { print('Error configuring Amplify: $e'); } } Future<bool> isUserSignedIn() async { final result = await Amplify.Auth.fetchAuthSession(); return result.isSignedIn; } @override Widget build(BuildContext context) { return Authenticator( child: MaterialApp( builder: Authenticator.builder(), home: _isAmplifyConfigured? FutureBuilder( future: isUserSignedIn(), builder: (BuildContext ctx, AsyncSnapshot snapshot) { if (snapshot.data == null) { return const Center( child: CircularProgressIndicator(), ); } else { return Scaffold( floatingActionButton: FloatingActionButton( backgroundColor: Colors.blue, foregroundColor: Colors.white, onPressed: () => { Navigator.of(context).push( MaterialPageRoute(builder: (context) => AddDevice())), }, child: Icon(Icons.add), ) ); } }): Text("not logged in") ), ); } } This is a basic code of a more complex app but even here it does not work. I tried several suggestions from other posts with all the same result.
