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)

Canvas Demo app

Let's create another new project to explore the topic of drawing with Canvas. We will reuse what we just learned and this time we will also draw to the Bitmap.

Creating a new project

Create a new project in the same way as we did for Sub' Hunter, but call it Canvas Demo. If you have the Sub' Hunter project open now, you can select File | New Project and create a project using the following options:

As we did before, be sure that the Empty Activity option is selected. Don't worry about refactoring the name of the activity. This is just a mini-app to play around with; we will not be returning to it.

Important note

The complete code for this mini-app can be found on the GitHub repo in the Chapter 5/Canvas Demo folder.

Coding the Canvas demo app

To get started, edit the autogenerated code, including the class declaration, to change the type of Activity class, add the related import statements, declare a few...