Method Channel Sent Value In Flutter

Method Channel Sent Value In Flutter :

MainActivity.kt

package com.jdkgroup.flutter_tutorial

import android.os.Bundle
import io.flutter.app.FlutterActivity
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugins.GeneratedPluginRegistrant

class MainActivity : FlutterActivity() {
    private val channel = "method_channel_plugin"
    private var arguments = HashMap<String, Object>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        GeneratedPluginRegistrant.registerWith(this)
        MethodChannel(flutterView, channel).setMethodCallHandler { methodCall, result ->
            if (methodCall.method == "callName") {
                arguments = methodCall!!.arguments as (HashMap<String, Object>)
                result.success(arguments.toString())
            }
            if (methodCall.method == "callTitle") {
                result.success("Flutter Tutorial")
            }
        }
    }
}

main.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Tutorial',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final platform = MethodChannel("method_channel_plugin");
  String valueStore;
  final StreamController<String> _streamController = StreamController<String>();
  @override
  void initState() {
    getData();
    super.initState();
  }

  Future getData() async {
    var value;

    Map<String, dynamic> options = new Map();
    options.putIfAbsent("name", () => "kamlesh");

    try {
      value = await platform.invokeMethod("callName", options);
      _streamController.add(value);
    } catch (e) {}
    return value;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("Method Channel Sent Value in Flutter"),
        ),
        body: StreamBuilder<String>(
            stream: _streamController.stream,
            builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
              if (!snapshot.hasData) {
                return Container();
              }
              return Center(
                  child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                    Text(snapshot.data),
                  ]));
            }));
  }
}

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