Book Image

Learning Java by Building Android Games - Second Edition

By : John Horton
Book Image

Learning Java by Building Android Games - Second Edition

By: John Horton

Overview of this book

Android is one of the most popular mobile operating systems presently. It uses the most popular programming language, Java, as the primary language for building apps of all types. However, this book is unlike other Android books in that it doesn’t assume that you already have Java proficiency. This new and expanded second edition of Learning Java by Building Android Games shows you how to start building Android games from scratch. The difficulty level will grow steadily as you explore key Java topics, such as variables, loops, methods, object oriented programming, and design patterns, including code and examples that are written for Java 9 and Android P. At each stage, you will put what you’ve learned into practice by developing a game. You will build games such as Minesweeper, Retro Pong, Bullet Hell, and Classic Snake and Scrolling Shooter games. In the later chapters, you will create a time-trial, open-world platform game. By the end of the book, you will not only have grasped Java and Android but will also have developed six cool games for the Android platform.
Table of Contents (30 chapters)
Learning Java by Building Android Games Second Edition
Contributors
Preface
Index

The Bob (player's) class


This is the final class for this project. As a reminder, we need to make Bob teleport every time the player touches the screen and he should teleport to the location of the touch. I predict that a teleport method is quite likely. As we code this class, we will also see how to use a .png file to represent Bob instead of just using boring rectangles like we have done so far.

The first thing we will do is add the graphics (bob.png) file to the project.

Adding the Bob graphic to the project

Right-click and select Copy to copy the bob.png graphics file from the download bundle in the Chapter 13/drawable folder.

In Android Studio locate the app/res/drawable folder in the project explorer window. The following screenshot makes it clear where this folder can be located

Right-click on the drawable folder and select Paste to add the bob.png file to the project. Click OK twice to confirm the default options for importing the file into the project.

Coding the Bob class

In order to...