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

Jetpack Navigation

Using dynamic and static fragments, although very flexible, introduces a lot of boilerplate code into your app and can become quite complicated when user journeys require adding, removing, and replacing multiple fragments while managing the back stack. Google introduced the Jetpack components, as you learned in Chapter 1, Creating Your First App, to use established best practices in your code. The Navigation component within the suite of Jetpack components enables you to reduce boilerplate code and simplify navigation within your app. We are going to use it now to update the Star Sign app to use this component.

Exercise 3.05: Adding a Jetpack Navigation Graph

In this exercise, we are going to reuse most of the classes and resources from the last exercise. We will first create an empty project and copy the resources. Next, we will add the dependencies and create a navigation graph. Using a step-by-step approach, we will configure the navigation graph and add...