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Learning Java by Building Android  Games

You're reading from   Learning Java by Building Android Games Learn Java and Android from scratch by building six exciting games

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Product type Paperback
Published in Aug 2018
Publisher
ISBN-13 9781788839150
Length 774 pages
Edition 2nd Edition
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Author (1):
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John Horton John Horton
Author Profile Icon John Horton
John Horton
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Toc

Table of Contents (28) Chapters Close

Preface 1. Java, Android and Game Development FREE CHAPTER 2. Java: First Contact 3. Variables, Operators and Expressions 4. Structuring Code with Java Methods 5. The Android Canvas Class – Drawing to the Screen 6. Repeating Blocks of Code with Loops 7. Making Decisions with Java If, Else and Switch 8. Object-Oriented Programming 9. The Game Engine, Threads, and The Game Loop 10. Coding the Bat and Ball 11. Collisions, Sound Effects and Supporting Different Versions of Android 12. Handling Lots of Data with Arrays 13. Bitmap Graphics and Measuring Time 14. The Stack, the Heap, and the Garbage Collector 15. Android Localization -Hola! 16. Collections, Generics and Enumerations 17. Manipulating Bitmaps and Coding the Snake class 18. Introduction to Design Patterns and much more! 19. Listening with the Observer Pattern, Multitouch and Building a Particle System 20. More Patterns, a Scrolling Background and Building the Player's ship 21. Completing the Scrolling Shooter Game 22. Exploring More Patterns and Planning the Platformer Project 23. The Singleton Pattern, Java HashMap, Storing Bitmaps Efficiently and Designing Levels 24. Sprite-sheet animations, Controllable Player and Parallax Scrolling Backgrounds 25. Intelligent Platforms and Advanced Collision Detection 26. What next? Index

Coding the inanimate and decorative components

In the previous chapter we coded all the interfaces for our component classes. We coded GraphicsComponent, UpdateComponent and InputComponent. Now we will code the three simplest component classes that will be enough to complete quite a few of our specifications.

Let's start with the DecorativeBlockUpdateComponent.

DecorativeBlockUpdateComponent

The update-related components all implement just one method, update. Add a new class called DecorativeBlockUpdateComponent, implement UpdateComponent and add the empty update method as shown next.

class DecorativeBlockUpdateComponent implements UpdateComponent {
    @Override
    public void update(long fps, 
         Transform t, 
         Transform playerTransform) {
        // Do nothing
        // Not even set a collider
    }
}

Yes, the update method is meant to be empty as the decorative objects don't move or collide.

InanmiateBlockGraphicsComponent

Add a new class called InanimateBlockGraphicsComponent...

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