Book Image

Learning AndEngine

By : Martin Varga
Book Image

Learning AndEngine

By: Martin 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 (19 chapters)
Learning AndEngine
About the Author
About the Reviewers

Debug output

The last option that we will learn about is using Android's debug output to LogCat. LogCat is an Android logger that can be accessed through the adb tool, and it is available in Eclipse as well. Logging, in general, is a way to output text that a developer needs to see but should stay hidden from the user.

To open the LogCat tab, go to Window | Show View | Others… and search for LogCat.

If an Android device is already connected, LogCat will immediately show some log messages. The following screenshot shows an example of what a LogCat output looks like:

The log messages have the following attributes:

  • Log Level: This is the severity of the message. It can be verbose, debug, info, warning, error, or assert (also known as what a terrible failure (WTF)). It is indicated by one letter only.

  • Time: This is the timestamp when the message was added.

  • PID: This is the process ID of the app that printed the message.

  • TID: This is the thread ID.

  • Application: This is identified by the package...