Book Image

Learning Concurrency in Kotlin

By : Miguel Angel Castiblanco Torres
Book Image

Learning Concurrency in Kotlin

By: Miguel Angel Castiblanco Torres

Overview of this book

Kotlin is a modern and statically typed programming language with support for concurrency. Complete with detailed explanations of essential concepts, practical examples and self-assessment questions, Learning Concurrency in Kotlin addresses the unique challenges in design and implementation of concurrent code. This practical guide will help you to build distributed and scalable applications using Kotlin. Beginning with an introduction to Kotlin's coroutines, you’ll learn how to write concurrent code and understand the fundamental concepts needed to write multithreaded software in Kotlin. You'll explore how to communicate between and synchronize your threads and coroutines to write collaborative asynchronous applications. You'll also learn how to handle errors and exceptions, as well as how to work with a multicore processor to run several programs in parallel. In addition to this, you’ll delve into how coroutines work with each other. Finally, you’ll be able to build an Android application such as an RSS reader by putting your knowledge into practice. By the end of this book, you’ll have learned techniques and skills to write optimized code and multithread applications.
Table of Contents (11 chapters)

Adding networking permissions

Android requires applications to explicitly request permissions in order to access many features. This is done in order to present the user with an option to deny specific permissions, and prevent applications from doing something different from what the user expects.

Since we will be doing network requests, we will need to add the internet permission to the manifest of the application. Let's locate the AndroidManifest.xml file in the app/src/main directory, and edit it:

<manifest xmlns:android=""
<uses-permission android:name="android.permission.INTERNET" />
The name Internet is not accurate. This permission is needed in order to do any network request regardless of it actually reaching the...