go_router.dart

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

class MyGoRouter extends StatelessWidget {
  MyGoRouter({Key? key}) : super(key: key);

  static const title = 'Go Router';

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      debugShowCheckedModeBanner: false,
      routeInformationParser: _router.routeInformationParser,
      routerDelegate: _router.routerDelegate,
      title: title,
    );
  }

  final _router = GoRouter(
    routes: [
      GoRoute(
        path: '/',
        builder: (context, state) => const Page1Screen(),
      ),
      GoRoute(
        path: '/page2',
        builder: (context, state) => const Page2Screen(),
      ),
    ],
  );
}

class Page1Screen extends StatelessWidget {
  const Page1Screen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: const Text(MyGoRouter.title),
          backgroundColor: Colors.deepPurple,
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                onPressed: () => context.go('/page2'),
                child: const Text('Go to page 2'),
              ),
            ],
          ),
        ),
      );
}

class Page2Screen extends StatelessWidget {
  const Page2Screen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: const Text(MyGoRouter.title),
          backgroundColor: Colors.teal,
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                onPressed: () => context.go('/'),
                child: const Text('Go to home page'),
              ),
            ],
          ),
        ),
      );
}