Apress Practical Android 4 Games Development (2011).pdf

Create 2D and 3D Android game apps,

using hands-on practical examples

Practical

Android 4 Games

Development

J. F. DiMarzio

For your convenience Apress has placed some of the front

matter material after the index. Please use the Bookmarks

and Contents at a Glance links to access them.

Contents at a Glance

Contents .............................................................................................................. v

Foreword ........................................................................................................... ix

About the Author................................................................................................. x

About the Technical Reviewers ......................................................................... xi

About the Game Graphics Designer .................................................................. xii

Acknowledgments ........................................................................................... xiii

Preface ............................................................................................................. xiv

Part I: Planning and Creating 2D Games ............................................................ 1

■ Chapter 1: Welcome to Android Gaming.......................................................... 3

■ Chapter 2: Star Fighter : A 2-D Shooter ......................................................... 15

■ Chapter 3: Press Start: Making a Menu ........................................................ 27

■ Chapter 4: Drawing The Environment............................................................ 73

■ Chapter 5: Creating Your Character ............................................................ 119

■ Chapter 6: Adding the Enemies ................................................................... 159

■ Chapter 7: Adding Basic Enemy Artificial Intelligence ................................ 177

■ Chapter 8: Defend Yourself! ........................................................................ 207

■ Chapter 9: Publishing Your Game................................................................ 243

Part II: Creating 3D Games ............................................................................. 253

■ Chapter 10: Blob Hunter : Creating 3- D Games ............................................ 255

■ Chapter 11: Creating an Immersive Environment ....................................... 271

■ Chapter 12: Navigating the 3-D Environment .............................................. 287

Index ............................................................................................................... 301

Part

Planning and Creating

2D Games

The first part of this book, Chapter 1-9, will take you through the processes of planning

and creating a playable 2D Android game – Star Fighter. The creation of this game will

follow a distinct and logical path. First you will plan and write the story behind your game.

Next, you will create the background for the game. Then you will create the playable and

non-playable characters. Finally you will create the weapons systems and collision

detection. Before following the steps needed to deploy your game to a mobile device in

Chapter 9, at the end of Chapter 8, I provide the complete code listings of the most

important 2D files that you either created or modified in Part 1. Use these listings to

compare your code and ensure that each game runs properly. This will prepare you for the

3D development phase that follows in Part 2: “Creating 3D Games” (Chapters 10-12).

Chapter

Welcome to Android

Gaming

I began developing on Android in early 2008 on the beta platform. At the time, no

phones were announced for the new operating system and we developers genuinely felt

as though we were at the beginning of something exciting. Android captured all of the

energy and excitement of the early days of open source development. Developing for

the platform was very reminiscent of sitting around an empty student lounge at 2:00 a.m.

with a Jolt cola waiting for VAX time to run our latest code. It was an exciting platform to

see materialize, and I am glad I was there to see it.

As Android began to grow and Google released more updates to solidify the final

architecture, one thing became apparent: Android, being based on Java and including

many well known Java packages, would be an easy transition for the casual game

developer. Most of the knowledge that a Java developer already had could be recycled

on this new platform. The very large base of Java game developers could use that

knowledge to move fairly smoothly onto the Android platform.

So how does a Java developer begin developing games on Android and what tools are

required? This chapter aims to answer these questions and more. Here, you will learn

how to block out your game’s story into chunks that can be fully realized as parts of

your game. We’ll explore some of the essential tools required to carry out the tasks in

future chapters

This chapter is very important, because it gives you something that not many other

gaming books have—a true focus on the genesis of a game. While knowing how to write

the code that will bring a game to life is very important, great code will not help if you do

not have a game to bring to life. Knowing how to get the idea for your game out of your

head in a clean and clear way will make the difference between a good game and a

game that the player can’t put down.

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