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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 2. Java: First Contact FREE CHAPTER 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 player's components and transform

Since Bob is the most significant object that uses an Animator, let's code all the necessary classes to get the player game object working. There are three components, AnimatedGraphicsComponent, PlayerInputComponent and PlayerUpdateComponent.

Before we code the components, we will also need a more advanced version of the Transform class.

PlayerTransform

Create a new class called PlayerTransform and add the member variables along with the constructor method. Notice the class extends Transform so it will also have access to the methods and members of the simpler Transform class we coded in Chapter 23: Coding the basic Transform.

import android.graphics.PointF;
import android.graphics.RectF;

import java.util.ArrayList;

class PlayerTransform extends Transform {

    private ArrayList<RectF> mColliders;

    private final float TENTH = .1f;
    private final float HALF = .5f;
    private final float THIRD = .3f;
    private final float...
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