Book Image

How to Build Android Apps with Kotlin

By : Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal
Book Image

How to Build Android Apps with Kotlin

By: Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal

Overview of this book

Are you keen to get started building Android 11 apps, but don’t know where to start? How to Build Android Apps with Kotlin is a comprehensive guide that will help kick-start your Android development practice. This book starts with the fundamentals of app development, enabling you to utilize Android Studio and Kotlin to get started building Android projects. You'll learn how to create apps and run them on virtual devices through guided exercises. Progressing through the chapters, you'll delve into Android’s RecyclerView to make the most of lists, images, and maps, and see how to fetch data from a web service. Moving ahead, you'll get to grips with testing, learn how to keep your architecture clean, understand how to persist data, and gain basic knowledge of the dependency injection pattern. Finally, you'll see how to publish your apps on the Google Play store. You'll work on realistic projects that are split up into bitesize exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. You'll build apps to create quizzes, read news articles, check weather reports, store recipes, retrieve movie information, and remind you where you parked your car. By the end of this book, you'll have the skills and confidence to build your own creative Android applications using Kotlin.
Table of Contents (17 chapters)
Preface
12
12. Dependency Injection with Dagger and Koin

Summary

In this chapter, we looked at the different types of testing and the frameworks available for implementing these tests. We also took a look at the testing environment and how to structure it for each environment, as well as structuring your code in multiple components that can be individually unit tested. We analyzed different ways to test code, how we should approach testing, and how, by looking at different test results, we can improve our code. With TDD, we learned that by starting with testing, we can write our code faster and ensure it is less error-prone. The activity is where all these concepts came together into building a simple Android application, and we can observe how, by adding tests, the development time increases, but this pays off in the long term by eliminating possible bugs that appear when the code is modified.

The frameworks we have studied are some of the most common ones, but there are others that build on top of these and are used by developers in...