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import 'dart:async';

import 'package:connectivity/connectivity.dart';
import 'package:network_aware/enums/connectivity_status.dart';

enum ConnectivityStatus {
  WiFi,
  Cellular,
  Offline

kururu-abdo

import java.awt.BorderLayout
import java.awt.EventQueue
import java.awt.GridLayout
import java.awt.Panel
import java.awt.event.ActionEvent
import java.awt.event.ActionListener
import java.awt.event.MouseEvent
import java.awt.event.MouseListener

kururu-abdo

class Book(var name:String, var author:String , var published:String , 
           
           var language:String,
           var pages:Int  ){
    
    var bookMarks: MutableMap<Int , String> =mutableMapOf<Int , String>()
     
 fun   addBookMark(bookMarkNote:String , page:Int){
     if(page<pages){
              bookMarks!!.put(page , bookMarkNote)

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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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import 'dart:ui';

import 'package:flutter/material.dart';

MaterialColor createMaterialColor(Color color) {
  List strengths = <double>[.05];
  Map<int, Color> swatch = <int, Color>{};
  final int r = color.red, g = color.green, b = color.blue;

  for (int i = 1; i < 10; i++) {

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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.

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This is a quick guide to Kotlin programming language. The previous part of this guide is here

#Object Oriented

fun main(args : Array<String>) {
  class local (val x : Int)
  
  val y = local(10)
 println("${y.x}")