#06 백그라운드 - 플러터

backFlutterMain.dart

// ... import 생략

class IntentService extends StatefulWidget {
  @override
  _IntentServiceState createState() => _IntentServiceState();
}

class _IntentServiceState extends State<IntentService> {
  String data;
  MethodChannel dataChannel;
  @override
  void initState() {
    dataChannel = new MethodChannel("app.james.cam/backdata")
      ..setMethodCallHandler((call) {
        print(call.method);
        print(call.arguments.toString());
        if (call.method == "data") {
          if(!mounted) return;
          setState(() {
            this.data = call.arguments;
          });
        }
        return;
      });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(this.data ?? "IntentService with Flutter"),),
      body: Center(
        child: TextButton(
          child: Text("Play"),
          onPressed: () async{
            const String _method = "intentservicestart";
            const String _channelName = "app.james.cam/intentservice";
            MethodChannel channel = new MethodChannel(_channelName);
            await channel.invokeMethod<void>(_method);
            return;
          },
        ),
      ),
    );
  }
}