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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 five exciting games

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781800565869
Length 686 pages
Edition 3rd 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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Table of Contents (24) Chapters Close

Preface 1. Chapter 1: Java, Android, and Game Development 2. Chapter 2: Java – First Contact FREE CHAPTER 3. Chapter 3: Variables, Operators, and Expressions 4. Chapter 4: Structuring Code with Java Methods 5. Chapter 5: The Android Canvas Class – Drawing to the Screen 6. Chapter 6: Repeating Blocks of Code with Loops 7. Chapter 7: Making Decisions with Java If, Else, and Switch 8. Chapter 8: Object-Oriented Programming 9. Chapter 9: The Game Engine, Threads, and the Game Loop 10. Chapter 10: Coding the Bat and Ball 11. Chapter 11: Collisions, Sound Effects, and Supporting Different Versions of Android 12. Chapter 12: Handling Lots of Data with Arrays 13. Chapter 13: Bitmap Graphics and Measuring Time 14. Chapter 14: Java Collections, the Stack, the Heap, and the Garbage Collector 15. Chapter 15: Android Localization – Hola! 16. Chapter 16: Collections and Enumerations 17. Chapter 17: Manipulating Bitmaps and Coding the Snake Class 18. Chapter 18: Introduction to Design Patterns and Much More! 19. Chapter 19: Listening with the Observer Pattern, Multitouch, and Building a Particle System 20. Chapter 20: More Patterns, a Scrolling Background, and Building the Player's Ship 21. Chapter 21: Completing the Scrolling Shooter Game 22. Chapter 22: What Next? 23. Other Books You May Enjoy

Coding the Bat input handling

You probably remember we saw the onTouchEvent method in the Sub' Hunter project. It was provided by the Activity class. In this project, however, the input handling is not in the Activity class. If it were, we would need to somehow share values between the PongActivity and PongGame classes and things might get into a bit of a muddle. Fortunately, the onTouchEvent method is also provided by the SurfaceView class, which the PongGame class extends (inherits from).

This time, we will make our code a little bit more advanced to handle left, right, and stop as well as to trigger setting mPaused to false and start the game.

Important note

Even this more advanced touch handling code is still quite primitive compared to a professional game. We will increase the professionalism and effectiveness of our touch handling code in the final two projects. It is then left as an exercise for you to come back and improve the Pong game code.

Add all the code...

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