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

Chapter 13. Bitmap Graphics and Measuring Time

So far in this book, we have drawn exclusively with primitive shapes and text. In this section, we will see how we can use the Canvas class to draw Bitmap graphics- after all Bob is so much more than just a block or a line. We will also code Bob and implement his teleportation feature, shield and collision detection. To finish the game off, we will add a HUD, measure the time, and code a solution to remember the longest (best) time.

In this chapter we will:

  • Learn how to use bitmap graphics in Android

  • Implement our teleporting superhero, Bob

  • Finish all the other features of the game including the HUD and timing

Let's wrap this game up.