Book Image

Reactive Programming in Kotlin

By : Rivu Chakraborty
Book Image

Reactive Programming in Kotlin

By: Rivu Chakraborty

Overview of this book

In today's app-driven era, when programs are asynchronous, and responsiveness is so vital, reactive programming can help you write code that's more reliable, easier to scale, and better-performing. Reactive programming is revolutionary. With this practical book, Kotlin developers will first learn how to view problems in the reactive way, and then build programs that leverage the best features of this exciting new programming paradigm. You will begin with the general concepts of Reactive programming and then gradually move on to working with asynchronous data streams. You will dive into advanced techniques such as manipulating time in data-flow, customizing operators and provider and how to use the concurrency model to control asynchronicity of code and process event handlers effectively. You will then be introduced to functional reactive programming and will learn to apply FRP in practical use cases in Kotlin. This book will also take you one step forward by introducing you to Spring 5 and Spring Boot 2 using Kotlin. By the end of the book, you will be able to build real-world applications with reactive user interfaces as well as you'll learn to implement reactive programming paradigms in Android.
Table of Contents (20 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Getting started with ToDoApp on Android

As mentioned earlier, we are using Android Studio 3.0 (stable) for this project. The following screenshot depicts the project structure that we're using:

In this project, we are using package-by features, and I do prefer to use package-by for Android development, mainly for its scalability and maintainability. Also, note that it is best practice to use package-by feature in Android; although, you can obviously use your preferred model. You can read more about the package-by feature at

Now, let's understand the package structure used in this application. The root package here is com.rivuchk.todoapplication, the package for the application, identical with the applicationId. The root package contains two classes—ToDoApp and BaseActivity. The ToDoApp class extends so that we can have our own implementation of the Application class. Now, what is BaseActivity? BaseActivity...