import 'package:flutter/foundation.dart'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; import 'package:permission_handler/permission_handler.dart'; void main() => runApp(const MyApp()); class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return const MaterialApp( title: 'Flutter Demo', home: CallWidget(title: 'app-to-phone-flutter'), ); } } class CallWidget extends StatefulWidget { const CallWidget({Key key = const Key("any_key"), required this.title}) : super(key: key); final String title; @override _CallWidgetState createState() => _CallWidgetState(); } class _CallWidgetState extends State { SdkState _sdkState = SdkState.LOGGED_OUT; static const platformMethodChannel = MethodChannel('com.vonage'); _CallWidgetState() { platformMethodChannel.setMethodCallHandler(methodCallHandler); } Future methodCallHandler(MethodCall methodCall) async { switch (methodCall.method) { case 'updateState': { setState(() { var arguments = 'SdkState.${methodCall.arguments}'; _sdkState = SdkState.values.firstWhere((v) {return v.toString() == arguments;} ); }); } break; default: throw MissingPluginException('notImplemented'); } } Future _loginUser() async { String token = "ALICE_TOKEN"; try { await platformMethodChannel .invokeMethod('loginUser', {'token': token}); } on PlatformException catch (e) { if (kDebugMode) { print(e); } } } Future _makeCall() async { try { await requestPermissions(); await platformMethodChannel.invokeMethod('makeCall'); } on PlatformException catch (e) { if (kDebugMode) { print(e); } } } Future requestPermissions() async { await [ Permission.microphone] .request(); } Future _endCall() async { try { await platformMethodChannel.invokeMethod('endCall'); } on PlatformException catch (e) { if (kDebugMode) { print(e); } } } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ const SizedBox(height: 64), _updateView() ], ), ), ); } Widget _updateView() { if (_sdkState == SdkState.LOGGED_OUT) { return ElevatedButton( onPressed: () { _loginUser(); }, child: const Text("LOGIN AS ALICE") ); } else if (_sdkState == SdkState.WAIT) { return const Center( child: CircularProgressIndicator(), ); } else if (_sdkState == SdkState.LOGGED_IN) { return ElevatedButton( onPressed: () { _makeCall(); }, child: const Text("MAKE PHONE CALL") ); } else if (_sdkState == SdkState.ON_CALL) { return ElevatedButton( onPressed: () { _endCall(); }, child: const Text("END CALL") ); } else { return const Center( child: Text("ERROR") ); } } } enum SdkState { LOGGED_OUT, LOGGED_IN, WAIT, ON_CALL, ERROR }

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