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

Defining the main application service


As you already know, our application is dealing with Notes and Todos. The current application implementation keeps our data locally stored in the SQLite database. This data will be synchronized with the backend instance running on some remote server. All operations related to the synchronization will be performed silently in the background of our application. All responsibility will be given to the service, which we will define now. Create a new package called service and a new class MainService that will extend the Androidservice class. Make sure your implementation looks like this:

    class MainService : Service(), DataSynchronization { 
 
      private val tag = "Main service" 
      private var binder = getServiceBinder() 
      private var executor = TaskExecutor.getInstance(1) 
 
      override fun onCreate() { 
        super.onCreate() 
        Log.v(tag, "[ ON CREATE ]") 
      } 
 
      override fun onStartCommand(intent: Intent?, flags: Int...