Book Image

Learning Java by Building Android Games - Third Edition

By : John Horton
5 (1)
Book Image

Learning Java by Building Android Games - Third Edition

5 (1)
By: John Horton

Overview of this book

Android is one of the most popular mobile operating systems today. It uses the most popular programming language, Java, as one of the primary languages for building apps of all types. Unlike most other Android books, this book doesn’t assume that you have any prior knowledge of Java programming, instead helps you get started with building Android games as a beginner. This new, improved, and updated third edition of Learning Java by Building Android Games helps you to build Android games from scratch. Once you've got to grips with the fundamentals, the difficulty level increases steadily as you explore key Java topics, such as variables, loops, methods, object-oriented programming (OOP), and design patterns while working with up-to-date code and supporting examples. At each stage, you'll be able to test your understanding by implementing the concepts that you’ve learned to develop a game. Toward the end, you’ll build games such as Sub Hunter, Retro Pong, Bullet Hell, Classic Snake, and Scrolling Shooter. By the end of this Java book, you'll not only have a solid understanding of Java and Android basics but will also have developed five cool games for the Android platform.
Table of Contents (24 chapters)

Testing the game

Now, we can run the game in the usual way. Notice the subHorizontalposition and subVerticalPosition variables in the following abbreviated logcat output:

subHorizontalPosition: 30
subVerticalPosition: 13

Try running the game again; you will get different positions, demonstrating that our Random-based code is working and that we can confidently call newGame whenever we want to start a new game:

subHorizontalPosition: 14
subVerticalPosition: 7

Important note

It is possible but very unlikely that you can call the newGame method and get a sub' in the same position.

That's it – now, we can spawn our sub' each new game!