class MainActivity: FlutterActivity() {

    companion object {
        const val CHANNEL2 = "notificacion.firebase.message"
        lateinit var resultado :MethodChannel.Result
        lateinit var llamadaMetodo: MethodCall
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        GeneratedPluginRegistrant.registerWith(this)

        MethodChannel(flutterView, CHANNEL2).setMethodCallHandler { methodCall, result ->

            resultado = result
            llamadaMetodo = methodCall

            FirebaseInstanceId.getInstance().instanceId.addOnCompleteListener(OnCompleteListener { task ->
                if (!task.isSuccessful) {
                    print("getInstanceId failed ${task.exception}")
                    return@OnCompleteListener
                }
                // Get new Instance ID token
                val token = task.result!!.token
                println(token)
            })
        }
    }
}

class NotificationReceiver: BroadcastReceiver() {

    override fun onReceive(context: Context?, intent: Intent?) {

        if(MainActivity.llamadaMetodo.method == "notificacion"){
            if(intent?.extras?.getString("titulo") != ""){
                try {
                    val meMap = HashMap<String, String>()
                    meMap["notificacion"] = intent?.extras?.getString("titulo").toString()
                    MainActivity.resultado.success(meMap)
                }
                catch (e: java.lang.Exception) {
                    println(e)
                }
            }else{
                val meMap = HashMap<String, String>()
                meMap["notificacion"] = "Esperando token"
                MainActivity.resultado.success(meMap)
            }
        }else{
            MainActivity.resultado.notImplemented()
        }
    }
}

D/AndroidRuntime(25529): Shutting down VM
    E/AndroidRuntime(25529): FATAL EXCEPTION: main
    E/AndroidRuntime(25529): Process: cl.personal.notificacion, PID: 25529
    E/AndroidRuntime(25529): java.lang.RuntimeException: Unable to start receiver cl.personal.notificacion.NotificationReceiver: java.lang.IllegalStateException: Reply already submitted
    E/AndroidRuntime(25529):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:3388)
    E/AndroidRuntime(25529):    at android.app.ActivityThread.access$1200(ActivityThread.java:199)
    E/AndroidRuntime(25529):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1661)
    E/AndroidRuntime(25529):    at android.os.Handler.dispatchMessage(Handler.java:106)
    E/AndroidRuntime(25529):    at android.os.Looper.loop(Looper.java:193)
    E/AndroidRuntime(25529):    at android.app.ActivityThread.main(ActivityThread.java:6669)
    E/AndroidRuntime(25529):    at java.lang.reflect.Method.invoke(Native Method)
    E/AndroidRuntime(25529):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    E/AndroidRuntime(25529):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
    E/AndroidRuntime(25529): Caused by: java.lang.IllegalStateException: Reply already submitted
    E/AndroidRuntime(25529):    at io.flutter.embedding.engine.dart.DartMessenger$Reply.reply(DartMessenger.java:124)
    E/AndroidRuntime(25529):    at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler$1.success(MethodChannel.java:204)
    E/AndroidRuntime(25529):    at cl.personal.notificacion.NotificationReceiver.onReceive(NotificationReceiver.kt:25)
    E/AndroidRuntime(25529):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:3379)
    E/AndroidRuntime(25529):    ... 8 more
    I/Process (25529): Sending signal. PID: 25529 SIG: 9
    Application finished.