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

Chapter 13. Anonymous Classes – Bringing Android Widgets to Life

This chapter could have been called "Even More OOP," as anonymous classes are very much still part of that subject, but as we will see, anonymous classes offer us so much flexibility, especially when it comes to interacting with the UI, that I thought they deserved a chapter title dedicated to them and one of their key uses in Android.

Now that we have a good overview of both the layout and coding of an Android app, as well as our newly acquired insight into object-oriented programming and how we can manipulate the UI from our Java code, we are ready to experiment with more widgets from the palette, alongside anonymous classes.

OOP is a tricky thing at times, and anonymous classes are known to sometimes be a bit awkward for beginners but, by gradually learning these new concepts and then practicing them repeatedly, over time, they will become our friend.

In this chapter, we will diversify a lot by going back to the Android Studio...