效果图

发送邮件:
打电话:

发送短信:

准备工作，

添加插件 get_it url_launcher
url_launcher插件需要加权限，

新建一个class类

import 'package:url_launcher/url_launcher.dart';
import 'package:get_it/get_it.dart';


class TelAndSmsService {
    
    

  void call(String number) => launch("tel:$number");
  void sendSms(String number) => launch("sms:$number");
  void sendEmail(String email) => launch("mailto:$email");
}


GetIt getIt = GetIt.instance;
void setupgetIt() {
    
    
  getIt.registerSingleton(TelAndSmsService());
}

出口地方初始化

void main() async {
    
    

//初始化
  setupgetIt();

  WidgetsFlutterBinding.ensureInitialized();
  if (Platform.isAndroid) {
    
    
    SystemChrome.setSystemUIOverlayStyle(
        const SystemUiOverlayStyle(statusBarColor: Colors.transparent));
    await Firebase.initializeApp();
  }
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
      .then((_) {
    
    
    runApp(const MyApp());
  });
}

调用代码

  final TelAndSmsService _service = getIt<TelAndSmsService>();
  final String number = "123456789";    //这里填写联系电话用于短信接收和电话接收
  final String email = "[email protected]";  //电子邮件

//backTop 是点击事件，
backTop: () {
    
    
			_service.call(number);  // 打电话
			_service.sendEmail(email);  //发送邮件
			_service.sendSms(number);   //发送邮件
                          }