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import 'dart:math';
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';

void main() {
  runApp(MyApp());
}

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import 'package:flutter/material.dart';
import 'package:app_name/routes.dart';

class MainView extends StatefulWidget {
  final GlobalKey<NavigatorState> navigatorKey;

  MainView(this.navigatorKey);

  @override
  _MainViewState createState() => _MainViewState();

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RabbitMQ with Node.js

Install and run RabbitMQ server

Download image

docker pull rabbitmq:management

Run server with web management

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import 'dart:io';
import 'package:flutter/material.dart';

import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:provider/provider.dart';
import 'package:clippy_flutter/clippy_flutter.dart';

void main() {
  runApp(
    ChangeNotifierProvider(

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import 'dart:async';

import 'package:flutter/cupertino.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:location/location.dart';

class PersonLocationProvider extends ChangeNotifier {
  Location _location = new Location();
  PermissionStatus _permissionGranted;
  StreamController<LocationData> currentLocation = StreamController.broadcast();

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private fun createNativeView(handle: Long) {
    FlutterMain.ensureInitializationComplete(this, arrayOf())

    val nativeView = FlutterNativeView(this, true)

    val callback = FlutterCallbackInformation.lookupCallbackInformation(handle)
    nativeView.runFromBundle(FlutterRunArguments().apply {
        bundlePath = FlutterMain.findAppBundlePath(this@Service)
        libraryPath = callback.callbackLibraryPath
        entrypoint = callback.callbackName

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

        MethodChannel(flutterView, "android_app_retain").apply {
            setMethodCallHandler { method, result ->
                if (method.method == "sendToBackground") {
                    moveTaskToBack(true)
                }

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class MainScreen extends StatefulWidget {
  State createState() => MainScreenState();
}

class MainScreenState extends State<MainScreen> {
  var _androidAppRetain = MethodChannel("android_app_retain");

  @override
  void initState() {
    super.initState();

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import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await initialConfig();

  final storage = Get.find<StorageService>();

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#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.