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

How we handle the lifecycle phases


When we are programming an app, how do we interact with this complexity? The good news is that the Android code that was auto-generated when we created our first project does most of it for us.

As we have discussed, we just don't see the methods that handle this interaction, but we do have the opportunity to override them and add our own code to that phase if we need to.

This means we can get on with learning Java and making Android apps until we come to one of the occasional instances in which we need to do something in one of the phases.

Note

If our app has more than one Activity, they will each have their own lifecycle. This doesn't have to complicate things and, overall, it will make things easier for us.

The following is a quick explanation of the methods provided by Android, for our convenience, to manage the lifecycle phases. To clarify our discussion of lifecycle methods, they are listed next to their corresponding phases which we have been discussing...