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

Static Fragments and Dual-Pane Layouts

The previous exercise introduced you to static fragments, those that can be defined in the activity XML layout file. One of the advantages of the Android development environment is the ability to create different layouts and resources for different screen sizes. This is used for deciding which resources to display depending on whether the device is a phone or a tablet. The space for laying out UI elements can increase substantially with the larger size of a tablet. Android allows specifying different resources depending on many different form factors. The qualifier frequently used to define a tablet in the res (resources) folder is sw600dp. This states that if the shortest width (sw) of the device is over 600 dp, then use these resources. This qualifier is used for 7" tablets and larger. Tablets facilitate what is known as dual-pane layouts. A pane represents a self-contained part of the user interface. If the screen is large enough, then...