import 'package:flutter/material.dart'; class MainScreen extends StatefulWidget { const MainScreen({ Key? key }) : super(key: key); @override _MainScreenState createState() => _MainScreenState(); } class _MainScreenState extends State { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text("Main Screen"), ), body: const Center( child: Text("Main Screen"), ), ); } }