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part of 'example_cubit.dart';

class ExampleState extends Equatable {
  final String text;

  const ExampleState(this.text);

  ExampleState copyWith({String? text}) {
    return ExampleState(text ?? this.text);
  }

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import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';

part 'example_state.dart';

class ExampleCubit extends Cubit<ExampleState> {
  ExampleCubit() : super(ExampleState(""));

  changeText(String value) {
    emit(state.copyWith(text: value));

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import 'package:cubit_example/screens/cubit_example_screen/cubit/example_cubit.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';

class CubitExampleScreen extends StatelessWidget {
  final ExampleCubit cubit = ExampleCubit();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: BlocBuilder<ExampleCubit, ExampleState>(

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import 'package:flutter/material.dart';

class SetStateScreen extends StatefulWidget {
  @override
  _SetStateScreenState createState() => _SetStateScreenState();
}

class _SetStateScreenState extends State<SetStateScreen> {
  String text = "";
  @override

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dart pub outdated --mode=null-safety

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flutter upgrade
flutter pub get
flutter --version

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environment:
  sdk: '>=2.12.0 <3.0.0'