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Learning AndEngine

Learning AndEngine

By : Varga
4.8 (6)
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Learning AndEngine

Learning AndEngine

4.8 (6)
By: Varga

Overview of this book

AndEngine is a very popular open source OpenGL (open graphics library) Android game engine, used to create mobile games quickly while maintaining the ability to fully customize them. This book will guide you through the whole development process of creating a mobile game for the Android platform using one of the most popular and easy-to-use game engines available today. Beginning with the very basics, you will learn how to install AndEngine, gather graphics, add sound and music assets, and design game rules. You will first design an example game and enhance it by adding various features over the course of the book. Each chapter adds more colors, enhances the game, and takes it to the next level. You will also learn how to work with Box2D, a popular 2D physics engine that forms an integral part of some of the most successful mobile games. By the end of the book, you will be able to create a complete, interactive, and fully featured mobile game for Android and publish it to Google Play.
Table of Contents (13 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Setting Up an AndEngine Project
1. Setting Up an AndEngine Project
Prerequisites
Downloading and installing the required software
Getting the AndEngine libraries
Creating a new application
Understanding resolution policies
Summary
2
2. Game Concept and Assets
2. Game Concept and Assets
The game concept
Getting the assets
Scene diagram
Summary
3
3. From Assets to Entities
3. From Assets to Entities
Managing resources
Entities
Summary
4
4. HUD and Text Display
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4. HUD and Text Display
Fonts and text
Writing text
HUD
Working with toasts
Localization
Debug output
Summary
5
5. Basic Interactions
5. Basic Interactions
A simple animation
User input
Collision detection
Using correct threads to perform actions
Summary
6
6. Physics
6. Physics
The physics engine
Adding physics
Summary
7
7. Detecting Collisions and Reacting to Events
7. Detecting Collisions and Reacting to Events
Collisions
Game events
Playing sounds on events
Summary
8
8. Advanced Physics
8. Advanced Physics
The Box2D Debug Draw extension
Assembling bodies from fixtures
Collision filtering
Joints
Summary
9
9. Adding a Menu and Splash Scene
9. Adding a Menu and Splash Scene
Managing multiple scenes
Storing values
Summary
10
10. Polishing the Game
10. Polishing the Game
What is polishing?
Adding music
Adding animations using entity modifiers
Particle systems
Parallax background
Shaders
Summary
11
11. Testing, Publishing, and What's Next
11. Testing, Publishing, and What's Next
Creating a production APK
Testing with the production APK
Testing on multiple devices
Getting in touch with the community
Publishing the game to the Google Play store
Promotion
Next steps
Summary
12
Index
Index

Working with toasts

Another way to output text on the screen is using toasts. A toast is a simple message widget that can provide feedback about an operation in progress. It's a core Android widget, not an AndEngine component, but we can nevertheless use it in our game.

The easiest way to show a toast is to use a static method provided by the Toast class. In a general Android app, we can simply call this as follows:

Toast.makeText(activity, "Hello World", Toast.LENGTH_LONG).show();

We can also call a toast inside the activity itself. This can be done as follows:

Toast.makeText(this, "Hello World", Toast.LENGTH_LONG).show();

The makeText() method creates the Toast object. It takes three parameters: the context (activity), the text to show, and the length of the toast, which can be one of the following two types:

  • Toast.LENGTH_LONG

  • Toast.LENGTH_SHORT

Finally, we call the show() method on the newly created Toast object.

However, if we try to call this object inside the game, it won't work. This is...

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