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Android Programming with Kotlin for Beginners

Android Programming with Kotlin for Beginners

By : John Horton
3.7 (19)
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Android Programming with Kotlin for Beginners

Android Programming with Kotlin for Beginners

3.7 (19)
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 (31 chapters)
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30
Index

Making functions flexible


As functions are the building blocks of our code, they need to be versatile to cater for anything we might need to do. We have already seen how we can create very varied parameter lists and return types, as well as deciding in code when to return to the calling code. As we progress, you will see that we need even more options. What follows is a quick glance at some more Kotlin function options that we will introduce now, and then get around to using for real at various points throughout the book.

Default and named arguments

A default parameter is where we the programmers provide a value (default) for a parameter that will be used if the code that calls the function does not provide it. A named argument is when the code calling a function specifies a name along with a value. Note that providing a value is optional. Just because a default value for a parameter is given does not prevent the calling code from overriding it by providing it. Have a look at the following...

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