The method 'Amplify' isn't defined for the type '_MyAppState'. -FlutterAmplify

Question

I've just started learning AWS Amplify and followed the step given in https://aws.amazon.com/getting-started/hands-on/build-flutter-app-amplify/module-two/ to initialize Amplify in my flutter project. But I'm getting The method 'Amplify' isn't defined for the type '_MyAppState' error when I'm trying to integrate Amplify (with statement final _amplify = Amplify();) in my App.

Below is my main.dart file.

import 'package:flutter/material.dart';
import './amplifyconfiguration.dart';
import 'package:amplify_core/amplify_core.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _amplify = Amplify();

  @override
  void initState() {
    super.initState();
    _configureAmplify();
  }

  @override
  Widget build(BuildContext context) {
    return Container();
  }

  void _configureAmplify() async {
    try {
      await _amplify.configure(amplifyconfig);
      print('Successfully configured Amplify ');
    } catch (e) {
      print('Could not configure Amplify ☠️');
    }
  }
}

Amplify dependency that I have imported in pubspec.yaml

amplify_core: '<1.0.0'

amplifyconfiguration.dart

const amplifyconfig = ''' {
   "UserAgent": "aws-amplify-cli/2.0",
   "Version": "1.0"
}''';

Also when I run "Amplify console", I'm getting App with id: xxxxxxxxxx not found

Answer 1

According to https://github.com/aws-amplify/amplify-flutter/issues/274 amplify_core is now renamed to amplify_flutter so you need to change

amplify_core: '<1.0.0'

to

amplify_flutter: '<1.0.0'

In addition, as Amplify class is a static singleton now, you don't need to instantiate it, so you can remove this line:

final _amplify = Amplify();