import 'package:flutter/material.dart'; import 'package:fluttertoast/fluttertoast.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'test', theme: ThemeData(primarySwatch: Colors.blue), home: Mypage(), ); } } class Mypage extends StatelessWidget { @override Widget build(BuildContext context) { re..