Book Image

Android Programming with Kotlin for Beginners

By : John Horton
5 (1)
Book Image

Android Programming with Kotlin for Beginners

5 (1)
By: John Horton

Overview of this book

Android is the most popular mobile operating system in the world and Kotlin has been declared by Google as a first-class programming language to build Android apps. With the imminent arrival of the most anticipated Android update, Android 10 (Q), this book gets you started building apps compatible with the latest version of Android. It adopts a project-style approach, where we focus on teaching the fundamentals of Android app development and the essentials of Kotlin by building three real-world apps and more than a dozen mini-apps. The book begins by giving you a strong grasp of how Kotlin and Android work together before gradually moving onto exploring the various Android APIs for building stunning apps for Android with ease. You will learn to make your apps more presentable using different layouts. You will dive deep into Kotlin programming concepts such as variables, functions, data structures, Object-Oriented code, and how to connect your Kotlin code to the UI. You will learn to add multilingual text so that your app is accessible to millions of more potential users. You will learn how animation, graphics, and sound effects work and are implemented in your Android app. By the end of the book, you will have sound knowledge about significant Kotlin programming concepts and start building your own fully featured Android apps.
Table of Contents (33 chapters)
Android Programming with Kotlin for Beginners
Contributors
Preface
Index

Function basics and recap


We have already seen and used functions. Some were provided for us by the Android API, such as onCreate and the other lifecycle functions.

We wrote others ourselves; for example, topClick and bottomClick. However, we haven't explained them properly, and there is more to functions than we have seen so far.

Note

You will often hear another term that is closely related and almost synonymous with functions. This is especially the case if you have previously learned Java or another object-oriented language. The word I am referring to is method. The distinction between a method and a function is rarely important from a technical point of view, and the difference is, in part, where in our code the function/method is declared. If you want to be programmatically correct, you can read this article, which goes into some depth and provides multiple opinions:

https://stackoverflow.com/questions/155609/whats-the-difference-between-a-method-and-a-function

In this book, I will refer...