Flutterでメールアプリや電話アプリを開く - Qiita

import 'package:flutter/material.dart'; import 'package:open_mail_phone_sample/home_screen.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, visualDensity: VisualDensity.adaptivePlatformDe