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

More on code comments


As you become more advanced at writing Kotlin programs, the solutions that you use to create your programs will become longer and more complicated. Furthermore, as we will see in later chapters, Kotlin was designed to manage complexity by having us divide up our code into separate classes, usually across multiple files.

Code comments are a part of the Kotlin files that do not have any function in the program execution itself; that is, the compiler ignores them. They serve to help the programmer to document, explain, and clarify their code to make it more understandable to themselves later, or to other programmers who might need to use or change it.

We have already seen a single-line comment:

// this is a comment explaining what is going on

The preceding comment begins with the two forward slash characters, //. The comment ends at the end of the line. So, anything on that line is for people only, whereas anything on the next line (unless it's another comment) needs to...