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

Laying out data with TableLayout


In the project window, expand the res folder. Now, right-click the layout folder and select New. Notice that there is an option for Layout resource file.

Select Layout resource file, and you will see the New Resource File dialog window.

In the File name field, enter my_table_layout. This is the same name we used in the call to setContentView within the loadTableLayout function.

Notice that it has already selected LinearLayout as the Root element option. Delete LinearLayout and type TableLayout in its place.

Click the OK button and Android Studio will generate a new TableLayout in an XML file called my_table_layout and place it in the layout folder ready for us to build our new table-based UI. Android Studio will also open the UI designer (if it isn't already) with the palette on the left and the attributes window on the right.

You can now uncomment the loadTableLayout function:

fun loadTableLayout(v: View) {
  setContentView(R.layout.my_table_layout)
}

You can...