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Android Programming for Beginners

Android Programming for Beginners

By : John Horton
3.8 (13)
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Android Programming for Beginners

Android Programming for Beginners

3.8 (13)
By: John Horton

Overview of this book

Are you trying to start a career in programming, but haven't found the right way in? Do you have a great idea for an app, but don't know how to make it a reality? Or maybe you're just frustrated that in order to learn Android, you must know Java. If so, then this book is for you. This new and expanded second edition of Android Programming for Beginners will be your companion to create Android Pie applications from scratch. We will introduce you to all the fundamental concepts of programming in an Android context, from the basics of Java to working with the Android API. All examples use the up-to-date API classes, and are created from within Android Studio, the official Android development environment that helps supercharge your application development process. After this crash course, we'll dive deeper into Android programming and you'll learn how to create applications with a professional-standard UI through fragments and store your user's data with SQLite. In addition, you'll see how to make your apps multilingual, draw to the screen with a finger, and work with graphics, sound, and animations too. By the end of this book, you'll be ready to start building your own custom applications in Android and Java.
Table of Contents (33 chapters)
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32
Index

Building a menu with LinearLayout

LinearLayout is probably the simplest layout that Android offers. As the name suggests, all the UI items within it are laid out linearly. You have just two choices—vertical and horizontal. By adding the following line of code (or editing via the Attribute window), you can configure a LinearLayout to lay things out vertically:

android:orientation="vertical"

You can then (as you could probably have guessed) change "vertical" to "horizontal" to lay things out horizontally.

Before we can do anything with LinearLayout, we need to add one to a layout file. And, as we are building three layouts in this project, we also need a new layout file.

Adding a LinearLayout to the project

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, as shown in the following screenshot:

Adding a LinearLayout to the project

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

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