flutter调用系统的打电话发短信发邮件功能

类似于安卓的通过设置 intent-action，点击按钮就能跳转到系统的拨号，发短信，发邮件等界面
引入类库
url_launcher: ^5.0.3

get_it: ^1.0.3+2

创建一个服务

import ‘package:url_launcher/url_launcher.dart’; class CallsAndMessagesService {void call(String number) => launch(“tel:$number”); void sendSms(String number) => launch(“sms:$number”); void sendEmail(String email) => launch(“mailto:$email”);}

初始化，注册服务，在 app 中任何地方都能调用
GetIt locator = GetIt(); void setupLocator() {locator.registerSingleton(CallsAndMessagesService());}

在主方法中设置
void main() { setupLocator(); runApp(MyApp());}

在需要的用到的地方创建

class _MyHomePageState extends State<MyHomePage> {final CallsAndMessagesService _service = locator<CallsAndMessagesService>(); final String number = “123456789”; final String email = “dancamdev@example.com”; …}

调用代码及界面

@override Widget build(BuildContext context) {return Scaffold( appBar: AppBar( title: Text(‘dancamdev’), ), body: Container(width: double.infinity, child: Column( mainAxisAlignment: MainAxisAlignment.center, mainAxisSize: MainAxisSize.max, children: <Widget>[ RaisedButton( child: Text( “call $number”,), onPressed: () => _service.call(number), ), SizedBox(height: 20), RaisedButton(child: Text( “message $number”,), onPressed: () => _service.sendSms(number), ), SizedBox(height: 20), RaisedButton(child: Text( “email $email”,), onPressed: () => _service.sendEmail(email), ), ], ), ), );