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Learning Libgdx Game Development

Chapter 1. Introduction to Libgdx and Project Setup

This book will take you on an exciting tour to show and teach you about game development using the open source Libgdx framework. Actually, you have chosen just the right time to read about game development as the game industry is in a remarkable state of change. With the advent of increasingly powerful smartphones and tablets as well as the ever-growing application stores for desktop computers and mobile platforms serving millions of users a day, it has never been easier for Independent Game Developers (also known as Indies) to enter the market with virtually no risks and very low budgets.

In this chapter you will learn about what Libgdx is and what the advantages are to use it for developing your own games. You will also get a brief overview of the feature set that Libgdx provides.

Before you can start developing games with Libgdx, you have to install and set up your development environment accordingly. You will be using the freely available and open source software Eclipse as your Integrated Development Environment (IDE ) and set up a basic project that uses Libgdx. It will feature a runnable example application for each currently supported target platform. These platforms are as follows:

Windows
Linux
Mac OS X
Android (Version 1.5 and above)
HTML5 (Using JavaScript and WebGL)

Note

The target platforms Windows, Linux, and Mac OS X will from now on be referred to as Desktop and also share a project in our development environment.

An alert reader may have noticed that iOS is missing in the list of supported target platforms. Fortunately, it is very likely that Libgdx will support the iOS platform soon as the developers have already put great effort into this feature. At the time of writing of this book, it is said that iOS, starting from Version 5.0 and above, will be supported.

Furthermore, you are going to explore what a game needs by looking at it from a technical standpoint, and why it is so important to plan a game project before the development starts.

At the end of this chapter, you will be introduced to the game project that is going to be developed and enhanced throughout this book.

Features of Libgdx 0.97

Since the release of Libgdx Version 0.1 back in March 2010, a lot of work has been contributed in order to improve this library. The latest stable release of Libgdx is version 0.97 from November 2012, which we are going to use throughout this book.

Here is the list of features taken from the official website (http://libgdx.badlogicgames.com/features.html):

Graphics

Rendering through OpenGL ES 1.x and 2.0 on all platforms
Custom OpenGL ES 2.0 bindings for Android 2.0 and above
Low-level OpenGL helpers:
- Vertex arrays and vertex buffer objects
- Meshes
- Textures
- Framebuffer objects (GLES 2.0 only)
- Shaders, integrating easily with meshes
- Immediate mode rendering emulation
- Simple shape rendering
- Automatic software or hardware mipmap generation
- ETC1 support (not available in JavaScript backend)
- Automatic handling of OpenGL ES context loss that restores all textures, shaders, and other OpenGL resources
High-level 2D APIs:
- Custom CPU side bitmap manipulation library
- Orthographic camera
- High-performance sprite batching and caching, and handling OpenGL ES 1.x and 2.0 differences transparently
- Texture atlases with whitespace stripping support, which are either generated offline or online
- Bitmap fonts (does not support complex scripts like Arabic or Chinese), which are either generated offline or loaded from TTF files (unsupported in JavaScript backend)
- 2D Particle system
- TMX tile map support
- 2D scene-graph API
- 2D UI library, based on scene-graph API, and fully skinable
High-level 3D APIs:
- Perspective camera
- Decal batching for 3D billboards or particle systems
- Basic loaders for Wavefront OBJ and MD5
- Work in progress: MD2, Ogre XML and FBX support, and 3D rendering API with materials and lighting system

Audio

Streaming music and sound effect playback for WAV, MP3, and OGG
Direct access to audio device for PCM sample playback and recording (unsupported in JavaScript backend)
Decoders for OGG and MPG3 formats (unsupported in JavaScript backend)
Pitch shifting, time stretching, and playback rate modification (unsupported in JavaScript backend)

Input Handling

Using abstractions for mouse and touchscreen, keyboard, accelerometer, and compass.
Gesture detector: detects taps, panning, flinging, and pinch zooming.
Gdx remote: to control your desktop application via your Android phone. Useful to test multi-touch gestures while debugging your desktop application.

File I/O

Filesystem abstraction for all platforms
Read-only filesystem emulation for JavaScript backend
Binary file support for JavaScript backend
Preferences for lightweight setting storage

Math and Physics

Matrix, vector, and quaternion classes. Matrix and vector operations are accelerated via native C code where possible.
Bounding shapes and volumes.
Frustum class, for picking and culling.
Catmull-Rom splines.
Common interpolators.
Concave polygon triangulation.
Intersection and overlap testing.
JNI wrapper for Box2D physics. It is so awesome that other engines use it as well.
Experimental JNI Wrapper for bullet physics.

Utilities

Custom collections with primitive support
JSON writer and reader with POJO (de-)serialization support
XML writer and reader

Tools

Gdx Setup UI for easy project setup
Particle editor
Texture packer
Bitmap font generator

Prerequisites for installing and configuring

Before you can start writing any application or game with Libgdx, you need to download and install the library and also some additional software.

Java Development Kit (JDK)

Due to the fact that Libgdx is a framework based on Java, it is necessary to download the JDK. The software is freely available on Oracle's website at http://www.oracle.com/technetwork/java/javase/downloads/index.html.

Click on the DOWNLOAD button to start downloading the latest JDK.

Note

It is important to choose the JDK instead of the JRE package. The reason is that the JDK package contains both, the Java Runtime Environment (JRE ) to run java applications and everything else that is required to develop them.

You will have to accept the license agreement and choose the version that is appropriate for your platform. For example, if you are using a 64-bit version of Windows, choose the download labeled as Windows x64.

To install the JDK, simply run the downloaded installer file (for example, jdk-7u11-windows-x64.exe) and follow the instructions on the screen.

In the welcome screen of the installer, click on Next > to continue.

Then, keep all features selected as to be installed and click on Next > again to continue.

Once the installation has been completed, click on the Close button to exit the installer.

Eclipse – Integrated Development Environment (IDE)

The next step is to download and install Eclipse, a freely available and open source IDE for developing applications in Java. Go to http://www.eclipse.org/downloads/ and choose Eclipse IDE for Java Developers to download for the platform you are using.

Once the download has finished, extract the archive to C:\eclipse\.

Downloading Libgdx

Next, go to http://code.google.com/p/libgdx/downloads/list and choose the file libgdx-0.9.7.zip to download Libgdx.

Note

At the time of writing this book, the latest stable version of Libgdx is 0.9.7. It is recommended to use the same version while working with this book.

In the meanwhile, create a new folder in the root folder of your C drive with the name libgdx. Once the download has finished, move the archive to C:\libgdx\. Then, open the archive and extract the .jar-File gdx-setup-ui to C:\libgdx\. The extracted program will help you later with creating new game projects in an easy to use GUI.

Installing Android SDK

The Android mobile OS is one of Libgdx's supported target platforms. Before you can create Android applications, you have to download and install the Android SDK. Go to http://developer.android.com/sdk/index.html and click on the Download the SDK Tools for Windows button. Should you be using an OS other than Windows, you will have to scroll down a bit further, click on Download for other platforms and choose the appropriate platform.

Once the download has finished, run the installer (for example, installer_r22.0.4-windows.exe) and follow the instructions on the screen.

You may see the following screen when you try to install the Android SDK. The installer cannot find the JDK although you have already installed it.

You need to set the value of the environment variable JAVA_HOME to the installation path of the JDK. To find the correct path go to C:\Program Files\Java\. You should see a folder starting with jdk in its name. Take the full name of this folder (here, jdk1.7.0_11) and append it to its path.

The complete path should now look similar to this: C:\Program Files\Java\jdk1.7.0_11.

Now you have to set the environment variable. Click on the Windows Start button and right-click on Computer. Then click on Properties to open the control panel system window.

Click on Advanced system settings on the left side of the window.

The System Properties window will appear. Next, click on the Environment Variables … button.

The Environment Variables window will appear. Click on the upper New … button that corresponds to User variables for <USERNAME>. A window with the title New User Variable will appear.

Now, fill in the two text fields. Use JAVA_HOME in the Variable name: field and the JDK's path you found out earlier in the Variable value: field.

Great! Now your system is prepared for the Android SDK installer. Please make sure to exit the Android SDK installer in case it is still running to let the change take effect. You should be presented with the following screen after the installer has restarted.

Now, back in the Android SDK setup, click on Next > to continue the installation.

The following screen will ask you to choose the users for which the Android SDK should be installed. Usually, the suggested selection Install just for me is perfectly fine, so just click on Next > to continue.

Now, choose the installation location on your computer. You can safely keep the suggested location and click on Next > to continue.

After that, you will be asked to choose a start menu folder. Again, you can safely keep the suggestion and click on Install to start the installation process.

After the installation is complete, click on Next > to continue.

Once the installation has finished, you can choose to start the Android SDK Manager. Leave the checkbox Start SDK Manager (to download system images, etc.) enabled and click on Finish to start the manager.

The Android SDK Manager enables you to download system images for the specific API levels you want to be able to develop applications for. For up-to-date and detailed information about Android API levels, check out the following link at http://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels.

Now, choose at least Android 2.2 (API 8) and/or any other higher API levels you may need and click on the Install packages … button to automatically download and install all relevant files. The reason why we want to use at least API level 8 is that earlier versions before Android 2.2 do not support OpenGL ES 2.0, which we will need in later chapters. Using a certain API level also allows you to control the range of devices that will be able to see and install on your application via the Google Play Store.

Once the download and installation process has finished, close the Android SDK Manager window.

Running Eclipse and installing plugins

Great! You are almost done setting everything up. The remaining steps involve running Eclipse for the first time and installing two important plugins, which are required to develop applications for Android and HTML5/GWT with Eclipse.

Open Windows Explorer and go to the location where you extracted Eclipse (here, C:\eclipse\) and simply run the program by double-clicking on the executable called eclipse.

Eclipse will ask you to select a so-called workspace. This is the folder where all your projects will be saved in. We want to use the folder C:\libgdx\ we created a bit earlier.

Select the Use this as the default and do not ask again checkbox, if you do not want to see this dialog every time you start Eclipse. To proceed, confirm the dialog by clicking on the OK button.

The first time Eclipse is started with a new workspace, it will greet you with a welcome screen. Simply click on the small cross (x) of the Welcome tab to close it.

You should see the standard view of Eclipse now, which is also called the Java Perspective . On the left-hand side you can see the Package Explorer section. This is where you will see and manage your different projects. That is all you need to know about Eclipse for the moment.

In case you have never worked with Eclipse before, it may seem quite overwhelming with all these windows, toolbars, huge context menus, and so on. However, rest assured that all steps will be discussed in detail as required to make it easy for you to follow.

To install new plugins, go to the menu bar and click on Help, and then Install New Software…. This will open the Install window where you can type special repository URLs to browse for new plugins. Google provides a list with such URLs at https://developers.google.com/eclipse/docs/getting_started. You have to choose the correct URL that corresponds with your Eclipse installation.

At the time of writing this book, Eclipse 4.2.1 (Juno) was the most current version available. According to Google's website, their suggested URL for our version is http://dl.google.com/eclipse/plugin/4.2.

Type the URL into the text field that is labeled Work with: and press return to let Eclipse request a list of available downloads. Select everything in the list that is shown in Developer Tools to add support for Android applications. Then, select everything in Google Plugin for Eclipse (required) to install the required Eclipse plugin. Lastly, select Google Web Toolkit SDK 2.5.1 in SDKs to add support for HTML5/GWT applications and click on Next > to continue.

Now, click on Next > to start the installation.

You will now be prompted to accept the terms of the license agreements by selecting the option I accept the terms of the license agreements. You have to do this before you can click on Finish to continue, as shown in the following screenshot:

The download process should only take a couple of minutes, depending on the speed of your network connection. When downloading has finished, Eclipse will show a security warning that you are about to install unsigned content and wants to know whether it should continue or abort. There is always a potential risk of installing malicious software. However, in this case the download is provided by Google, a well-known company, which should be trustworthy enough. Click on the OK button to accept the warning and continue the installation, as shown in the following screenshot:

After the installation has finished, a final restart of Eclipse is required. Click on the Yes button to confirm the restart, as shown in the following screenshot:

Congratulations! You have just finished the installation of everything you will need to develop and build your own games with Libgdx.

Creating a new application

The next step is to create a new application. Usually, you would have to create several projects in Eclipse: one project for the shared game code, another one for the desktop launcher, and two more for the Android and HTML5/GWT launchers. Furthermore, the projects would also have to be configured and linked together in a certain way. This is quite a time-consuming and more or less an error-prone process for inexperienced users.

Luckily, Libgdx comes with a nice tool called Libgdx Project Setup, which can do all of the things described previously. It is able to generate preconfigured projects for a new application, which can be directly imported into Eclipse.

To run the tool, open the Windows Explorer, go to C:\libgdx\, and double-click on the gdx-setup-ui file. When the program starts, click on the big Create button as shown in the following screenshot:

In the next window, you will see a box called CONFIGURATION on the left-hand side. Here you can configure what the tool will generate.

Enter demo in the Name field, which defines a common project name for your application. Each launcher project will add its own suffix to it, such as -desktop, -android, or -html. A preview of the outcome is shown in the OVERVIEW box on the right-hand side.

The Package field defines the name of your Java package. This needs to be a unique identifier written in lowercase, which is usually derived from a reversed domain name. You do not have to own a domain name nor does it have to really exist, but it helps in choosing non-conflicting namespaces for Java applications. This is especially important on Android, as identical package names for two separate applications would mean that the already installed application is going to be overwritten by the second one while trying to install it. For this demo application, use com.packtpub.libgdx.demo as the package name for now.

The Game class field defines the name of the main class in the shared game code project. Enter MyDemo as the game class name.

The Destination field defines the destination folder where all the projects will be generated. Click on the blue folder button and set the destination folder to C:\libgdx\.

In another box called LIBRARY SELECTION, the status of required libraries is shown. If there is any item listed in red color, it needs to be fixed before any project can be generated. You should see LibGDX being listed in red in the Required section. Click on the blue folder icon next to it as shown in the following screenshot:

Then, choose the downloaded archive file libgdx-0.9.7.zip from C:\libgdx\ and click on Open, as shown in the following screenshot:

The text color of the LibGDX label should have changed from red to green by now. Click on the Open the generation screen button to continue as shown in the following screenshot:

Click on the Launch! button to generate all projects as shown in the following screenshot:

All done! You can now go to Eclipse and start importing the generated projects into your workspace. To do this, simply navigate to File | Import, as shown in the following screenshot:

In the Import dialog, open the General category, select Existing Projects into Workspace, and click on the Next > button as shown in the following screenshot:

Click on the radio button Select root directory and enter C:\libgdx into the text field. This is the directory where all your generated projects were created. You need to confirm your text input by pressing the return key once. Eclipse will start to scan the directory for projects and list them. Leave all checkboxes selected and click on the Finish button, as shown in the following screenshot:

Eclipse will automatically try to build (compile) all four newly imported projects in your workspace and probably fail. There are two issues that need to be resolved manually after the import. The first one is reported directly to the Console window in Eclipse. It complains about being unable to resolve the target android-15.

You have to open the project properties of the demo-android project. First, select it in the Package Explorer box on the left-hand side. Then go to the menu bar and navigate to Project | Properties , as shown in the following screenshot:

The title of the window should say Properties for demo-android. If this is not the case, close the window and make sure you have selected the correct project and try again. Next, select Android from the list on the left-hand side. You will see a list of targets that are available on your system. Select Android 2.2, which uses API Level 8, and click on the OK Button.

Eclipse should recognize the change and successfully build the Android project this time.

The second issue requires you to click on the Problems tab in Eclipse. Open the Errors list and right-click on the reported problem, which should say The GWT SDK JAR gwt-servlet.jar is missing in the WEB-INF/lib directory. Choose Quick Fix from the context menu as shown in the following screenshot:

In the Quick Fix dialog, select Synchronize <WAR>/WEB-INF/lib with SDK libraries as the desired fix and click on the Finish button, as shown in the following screenshot:

The two issues should be solved by now, which means all projects now are automatically built without failure and can be compiled.

Key benefits

Create a libGDX multi-platform game from start to finish

Learn about the key features of libGDX that will ease and speed up your development cycles

Write your game code once and run it on a multitude of platforms using libGDX

An easy-to-follow guide that will help you develop games in libGDX successfully

Description

Game development is a field of interdisciplinary skills, which also makes it a very complex topic in many respects. One decision that usually needs to be made at the beginning of a game development processis to define the kind of computer system or platform the game will be developed for. This does not pose any problems in general but as soon as the game should also be able to run on multiple platforms it will become a developer's nightmare to maintain several distinct copies of the same game. This is where the libGDX multi-platform game development framework comes to the rescue! "Learning Libgdx Game Development" is a practical, hands-on guide that provides you with all the information you need to know about the libGDX framework as well as game development in general so you can start developing your own games for multiple platforms. You will gradually acquire deeper knowledge of both, libGDX and game development while you work through twelve easy-to-follow chapters. "Learning Libgdx Game Development" will walk you through a complete game development cycle by creating an example game that is extended with new features over several chapters. These chapters handle specific topics such as organizing resources, managing game scenes and transitions, actors, a menu system, using an advanced physics engine and many more. The chapters are filled with screenshots and/or diagrams to facilitate comprehension. "Learning Libgdx Game Development" is the book for you if you want to learn how to write your game code once and run it on a multitude of platforms using libGDX.

What you will learn

Learn about libGDX and prepare your system for multi-platform game development

Speed up your overall productivity with the awesome JVM Code Hot Swapping feature

Create a project setup and test the base code required for game building

Use Scene2D to create and organize complex menu structures

Use the texture packer to automate the creation of texture atlases

Replace the default launcher icon with your own app icon

Manage and play audio files and add special effects to a game to improve its look and feel

Create and use texture atlases for optimized sprite rendering

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Paperback book shipped to your preferred address

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Libgdx Cross-platform Game Development Cookbook

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Bob Jan 15, 2014

This book is worth its money if you want to get to know libgdx, a very elaborate and usable solution to multi platform game development, and the processes of developing games, from planning to implementation.I have already been involved in a few smaller game development projects but have not had any coding practice in this area. On top of that has been some time since I last used Java. I feared my rather basic Java skills were already too rusty. When I started reading this book it has shown me that this would be no problem."If you can't explain it simply, you don't understand it well enough." -a quote often accredited to Albert Einstein.Accordingly the author, Andreas Oehlke, does a wonderful job at selecting a suitable level to put the topics across keeping everything as simple as possible. The demand versus simplicity are examplary well balanced. Some basic knowlege of Java is required and knowing how to work with eclipse or at least having used the Android SDK could not hurt but is not mandatory. Still, a lot is being explained quickly and pragmatically from the ground up. Beginners and people with a bit ageing Java experience, like myself, should not hesitate to try libgdx with this book. The language is kept simple, without too sophisticated terms and many screenshots will guide you through the installation routines as well as the handling of the mighty IDE eclipse.On the other hand experienced Java developers will also have a great benefit by getting to know the libgdx framework, its mechanisms and features and the game development lifecycle. If the reader already has some proper Java development experience a few pages can be skimmed through.The book's clear structure starts with an introduction of libgdx, its features and setting everything up for each platform. Afterwards all aspects of game development and libgdx features are pragmatically exlained with the example game application calledd "Canyon Bunny" which is a quite complex 2d side scrolling platformer game. This serves as a fun and motivating example - as opposed to many dry and sterile example projects of other software development books. Later some advanced techniques for game development are introduced such as particle systems, physics and shader programming.

Amazon Verified review

Amazon Customer Feb 27, 2014

I had a desire to do something arcade-like for Android and further fueled by the promise of an apparently slick, easy to learn library that can allow you to develop for iPhone, desktop and HTML5 with the exact same code base as your Android game- I thought I would try out this book.I fired up my PC and got to work. 3 hours later I was still wrestling with the vagaries of Eclipse and I am not ashamed to say it almost broke me. But once the setup of Eclipse and LibGDX was complete I started to experience the pure wonder (no exaggeration) of LibGDX, well explained by the author of the book.For example the introduction to chapter 5 explained that we would plan the layout of a level and and implement the code for a level loader. Clearly things were about to get complicated? But no. This single chapter explained how to make a graphical map of a level, write a simple class to translate the graphics into a real, fully drawn, including a simple GUI, level- from the graphical assets we had previously discussed and written code for.Almost every chapter was the same roller coaster ride. Oh no here comes a tough topic. Ahh.. that was easy. Chapter 11 was the exception. That was tough.So if you already know a modest amount of Java you could be tweaking your first platform or arcade game in a few days. I hope the author writes another book to cover 3d games with LibGDX.

Konsument Dec 09, 2013

I recently got a copy of this book for professional purposes and thought to comment on it. My conclusion after reading the book is that it’s well worth its money. Do not hesitate much! No matter if you are new to libGDX and looking for the perfect tool for a multi-platform project, you are already acquainted and you want to have a solid libGDX reference around or you want to learn how a game is made – this book is the right choice.First, I want to congratulate the author, Andreas Oehlke, for his high level of expertise. It immediately becomes apparent that he has worked on many game projects, used many tools and has a profound know-how in the field. He's in my eyes a true professional with passion for the material. The way he explains new concepts and his actions throughout the book is simply great. He focuses on understanding through simplicity instead of trying to impress using complex incomprehensible terms. Reading the book will make you feel the effective knowledge gain instead of becoming more and more frustrated, because you cannot follow.The book's structure is very clear and understandable. The author first introduces libGDX and provides a short overview of the library’s features. He gives an elaborate tutorial of how to setup libGDX for the different platforms annotated with a huge amount of screenshots demonstrating each small step. I was very satisfied with that, for it considers novice readers without any knowledge of the required technologies and, to a certain extent, readers without any development experience at all. For some unknown reason, no other multi-platform game frameworks are mentioned though. The choice of libGDX would’ve been much better motivated on the background of a comparison of the different options available.The author than proceeds to show nearly every aspect of libGDX by developing a humorous platformer entitled “Canyon Bunny” step-by-step, introducing new features incrementally. The game’s main character is a cartoony bunny head that gives you a nearly lethal dose of cuteness. Surprisingly, by the end of the book we have an advanced game of quite complex dynamics. It’s not the typical tutorial game with limited scope, no, “Canyon Bunny” supports levels of arbitrary sizes and could get challenging… It features dying and respawning, a finite number of lives, special effects including a carrot blizzard, different game screens, a game options dialog etc. And the best thing is, you will not even feel the level of complexity rising, because it’s happening very gradually. I send all my compliments to the author for his marksmanship at designing and coding. At no point during the book I felt overwhelmed or confused, though I have previous experience developing multi-platform games.By the last chapter, the reader has a very solid picture of the libGDX ecosystem and should be able to freely use it for her own projects. I was missing a short explanation of how real-world scenarios like adding banner ads, connecting the application to social websites and synchronizing highscores can be handled. Also, no methods for the development of multiplayer games are discussed. I found it amazing that the author introduces you to different game development tools like physical shape editors and music / sound generators. Some were new to me as well. I previously had no idea how easy to use sfxr is. Studying and repeating the code exercises is time well spent. The reader also gets a fairly good idea of the magic that drives a game. There seems to be some some misunderstanding regarding the compatibility of the code with the latest versions of libGDX. The book was developed using the version 0.9.7. Naturally, the library has evolved a bit since then due to the active development cycle and community-driven behaviour. This is not an issue at all, however. As of now, you can get the game running on the latest version by fixing just a couple of self-explanatory compile-time issues. Taking a small look at the current API documentation makes it even easier.The book misses a proper ending though. It ends rather abruptly right after the last technical chapter. There is no real overview or closing words. Instead the author wishes us good fortune within the summary of the final chapter. The lack of a proper summary is, of course, not necessary as the book still covers all the material, but it was unusual in any case.On the publisher side I have to criticize the formatting of the book. The text is unjustified for no apparent reason and the figures, diagrams etc. are unlabeled which makes searches difficult. These problems are solvable with a minimal effort.I hope this is useful to someone!

James Seibel Oct 22, 2013

I'm a professional software engineer, and I was interested in game development using libgdx. Online libgdx tutorials are scattered around various websites, and didn't fully explain how to create games end-to-end. This book obviously took a lot of effort. It is methodically and logically organized to help you understand how to create animated games, and includes several data structures and techniques to help you. Very well written, I've already recommended the book to several other people.

Warzecha Maxence Jan 03, 2014

Really good quality and a lot to learn for beginners. End to end game development with advanced "tips" at the end.

Learning Libgdx Game Development: Are your games limited to one platform? Use our practical guide to libGDX and before long you'll be developing games that run across multiple platforms, enjoying an increased audience and revenue.

What do you get with Print?

Learning Libgdx Game Development

Chapter 1. Introduction to Libgdx and Project Setup

Note

Diving into Libgdx

Features of Libgdx 0.97

Graphics

Audio

Input Handling

File I/O

Math and Physics

Utilities

Tools

Getting in touch with the community

Prerequisites for installing and configuring

Java Development Kit (JDK)

Note

Eclipse – Integrated Development Environment (IDE)

Downloading Libgdx

Note

Installing Android SDK

Running Eclipse and installing plugins

Creating a new application

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