Book Image

Mastering Android Development with Kotlin

By : Miloš Vasić
Book Image

Mastering Android Development with Kotlin

By: Miloš Vasić

Overview of this book

Kotlin is a programming language intended to be a better Java, and it's designed to be usable and readable across large teams with different levels of knowledge. As a language, it helps developers build amazing Android applications in an easy and effective way. This book begins by giving you a strong grasp of Kotlin's features in the context of Android development and its APIs. Moving on, you'll take steps towards building stunning applications for Android. The book will show you how to set up the environment, and the difficulty level will grow steadily with the applications covered in the upcoming chapters. Later on, the book will introduce you to the Android Studio IDE, which plays an integral role in Android development. We'll use Kotlin's basic programming concepts such as functions, lambdas, properties, object-oriented code, safety aspects, type parameterization, testing, and concurrency, which will guide you through writing Kotlin code in production. We'll also show you how to integrate Kotlin into any existing Android project.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Handlers and threads


In Android, threading can be performed in the standard way by using threads. It is not recommended to just fire naked threads without any control. So, for this purpose, you can use the ThreadPools and Executor classes.

To demonstrate this, we will update our application. Create a new package called execution with a class called TaskExecutor. Make sure it looks like this:

     package com.journaler.execution 
 
     import java.util.concurrent.BlockingQueue 
     import java.util.concurrent.LinkedBlockingQueue 
     import java.util.concurrent.ThreadPoolExecutor 
     import java.util.concurrent.TimeUnit 
 
     class TaskExecutor private constructor( 
        corePoolSize: Int, 
        maximumPoolSize: Int, 
        workQueue: BlockingQueue<Runnable>? 
 
    ) : ThreadPoolExecutor( 
        corePoolSize, 
        maximumPoolSize, 
        0L, 
        TimeUnit.MILLISECONDS, 
        workQueue 
    ) { 
 
    companion object { 
        fun getInstance(capacity:...