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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

The widget exploration app

We have just discussed six widgets – EditText, ImageView, RadioButton (and RadioGroup), Switch, CheckBox, and TextClock. Let's make a working app and do something practical with each of them. We will also use a Button widget and a TextView widget again as well.

In this layout, we will use LinearLayout as the layout type that holds everything, and within LinearLayout, we will use multiple RelativeLayout instances.

RelativeLayout has been superseded by ConstraintLayout, but they are still commonly used and are worth playing around with. You will see as you build layouts within RelativeLayout that the UI elements behave very much the same as ConstraintLayout, but that the underlying XML is different. It is not necessary to learn this XML in detail, rather, using RelativeLayout will allow us to show the interesting way that Android Studio enables you to convert these layouts to ConstraintLayout.

Remember that you can refer to the completed code in the...

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