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

Navigation Overview

The Android navigation user flow is built around what are called destinations within your app. There are primary destinations that are available at the top level of your app and, subsequently, are always displayed in the main app navigation and secondary destinations. A guiding principle of each of the three navigation patterns is to contextually provide information about the main section of the app the user is in at any point in time.

This can take the form of a label in the top app bar of the destination the user is in, optionally displaying an arrow hint that the user is not at the top level, and/or providing highlighted text and icons in the UI that indicate the section the user is in. Navigation in your app should be fluid and natural, intuitively guiding the user while also providing some context of where they are at any given point in time. Each of the three navigation patterns you are about to explore accomplishes this goal in varying ways. Some of these...