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)
12. Dependency Injection with Dagger and Koin


In the previous chapter, we explored the Android Activity Lifecycle and looked into how it is used in apps to navigate between screens. We also analyzed various types of launch modes that defined how transitioning between screens happened. In this chapter, you'll explore fragments. A fragment is a section, portion, or, as the name implies, fragment of an Android activity.

Throughout the chapter, you'll learn how to use fragments, see how they can exist in more than one activity, and discover how multiple fragments can be used in one activity. You'll start by adding simple fragments to an activity and then progress to learning about the difference between static and dynamic fragments. Fragments can be used to simplify creating layouts for Android tablets that have larger form factors using dual-pane layouts. For example, if you have an average-sized phone screen and you want to include a list of news stories, you might only have enough space to display...