Book Image

Android Programming for Beginners - Second Edition

By : John Horton
Book Image

Android Programming for Beginners - Second Edition

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 (35 chapters)
Android Programming for Beginners - Second Edition
Contributors
Preface
Other Books You May Enjoy
Index

Exploring the palette – part 1


Let's take a whirlwind tour of some of those previously unexplored/unused items from the palette, and then we can drag a bunch of them onto a layout and see some of the methods they have that might be useful. We can then implement a project to put them all to use.

We already explored Button and TextView in the last chapter. Let's take a closer look at some more alongside them.

The EditText widget

The EditText widget does what the name suggests. If we make an EditText widget available to our users, then they will indeed be able to edit the text in it. We saw this in an earlier chapter, but we didn't actually achieve anything with it. What we didn't see was how to capture the information from within it, or where we would type this text-capturing code.

The following block of code assumes that we have declared an object of type EditText and used it to get a reference to EditText in our XML layout. We might write code like the following for a button click, perhaps...