Book Image

Mastering Android Development with Kotlin

By : Miloš Vasić
Book Image

Mastering Android Development with Kotlin

By: Miloš Vasić

Overview of this book

Kotlin is a programming language intended to be a better Java, and it's designed to be usable and readable across large teams with different levels of knowledge. As a language, it helps developers build amazing Android applications in an easy and effective way. This book begins by giving you a strong grasp of Kotlin's features in the context of Android development and its APIs. Moving on, you'll take steps towards building stunning applications for Android. The book will show you how to set up the environment, and the difficulty level will grow steadily with the applications covered in the upcoming chapters. Later on, the book will introduce you to the Android Studio IDE, which plays an integral role in Android development. We'll use Kotlin's basic programming concepts such as functions, lambdas, properties, object-oriented code, safety aspects, type parameterization, testing, and concurrency, which will guide you through writing Kotlin code in production. We'll also show you how to integrate Kotlin into any existing Android project.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Chapter 8. Android Preferences

In the previous chapter, we were dealing with complex data that was stored in the SQLite database. This time, we will deal with a much simpler form of data. We will cover one particular case of use to demonstrate the use of Android shared preferences.

Let's say that we want to remember the last page position of our ViewPager class and to open it every time an application is started. We will use shared preferences to remember it and persist that information on each view page position change and retrieve it when it is needed.

In this rather short chapter, we will cover the following topics:

  • What are Android's preferences and how can you use them?
  • Defining your own preferences manager