alokomkar

val job = launch { // launch a new coroutine and keep a reference to its Job
    delay(1000L)
    println("World!")
}
println("Hello")
job.join() // wait until child coroutine completes
println("Done") 

alokomkar

import kotlinx.coroutines.*

fun main() = runBlocking {
    repeat(100_000) { // launch a lot of coroutines
        launch {
            delay(5000L)
            print(".")
        }
    }
}

alokomkar

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"

alokomkar

import android.app.Service
import android.content.Intent
import android.os.IBinder

class MyAppService: Service() {

    private var startMode: Int = 0             // indicates how to behave if the service is killed
    private var binder: IBinder? = null        // interface for clients that bind
    private var allowRebind: Boolean = false   // indicates whether onRebind should be used

alokomkar

import android.app.Service
import android.content.Intent
import android.os.IBinder

class AudioLoopService : Service() {
    
    override fun onBind(intent: Intent?): IBinder? {
        TODO("Not yet implemented")
    }
}

alokomkar

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.alokomkar.javacollections.R

class HomeActivity: AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_home)
    }

alokomkar

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.fragment.app.FragmentContainerView
        android:name="com.alokomkar.activity.HomeFragment"
        android:id="@+id/homeFragment"
        android:layout_width="match_parent"

alokomkar

import android.app.Service
import android.content.Intent
import android.media.MediaPlayer
import android.os.IBinder
import com.alokomkar.javacollections.R

class AudioLoopService : Service() {

    private val mediaPlayer: MediaPlayer by lazy {
        MediaPlayer.create(this, R.raw.sample_audio)

alokomkar

import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.widget.AppCompatButton
import androidx.fragment.app.Fragment
import com.alokomkar.javacollections.R
import com.alokomkar.service.AudioLoopService

alokomkar

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">

    <androidx.appcompat.widget.AppCompatButton
        android:layout_width="match_parent"