错误，同时运行libgdx例如

Question

我是新来libgdx.Just试运行libgdx例子，我得到奇怪的错误，它说：

[2013-03-22 12:08:35 - ObjLoaderUsingLibGdx] Dx 1 error; aborting 
[2013-03-22 12:08:35 - ObjLoaderUsingLibGdx] Conversion to Dalvik format failed with error 1 
[2013-03-22 12:10:59 - ObjLoaderUsingLibGdx] Dx 
trouble processing "java/io/BufferedInputStream.class": 

Ill-advised or mistaken usage of a core class (java.* or javax.*) 
when not building a core library. 

This is often due to inadvertently including a core library file 
in your application's project, when using an IDE (such as 
Eclipse). If you are sure you're not intentionally defining a 
core class, then this is the most likely explanation of what's 
going on. 

However, you might actually be trying to define a class in a core 
namespace, the source of which you may have taken, for example, 
from a non-Android virtual machine project. This will most 
assuredly not work. At a minimum, it jeopardizes the 
compatibility of your app with future versions of the platform. 
It is also often of questionable legality. 

If you really intend to build a core library -- which is only 
appropriate as part of creating a full virtual machine 
distribution, as opposed to compiling an application -- then use 
the "--core-library" option to suppress this error message. 

If you go ahead and use "--core-library" but are in fact 
building an application, then be forewarned that your application 
will still fail to build or run, at some point. Please be 
prepared for angry customers who find, for example, that your 
application ceases to function once they upgrade their operating 
system. You will be to blame for this problem. 

If you are legitimately using some code that happens to be in a 
core package, then the easiest safe alternative you have is to 
repackage that code. That is, move the classes in question into 
your own package namespace. This means that they will never be in 
conflict with core system classes. JarJar is a tool that may help 
you in this endeavor. If you find that you cannot do this, then 
that is an indication that the path you are on will ultimately 
lead to pain, suffering, grief, and lamentation. 

我不知道是什么问题我按照this tutorial入门。有人能指出这个错误是什么。什么可以是这个错误的来源，我不能够了解所有的步骤那里导入所有的lib，并建立了路径以及

Answer 1

http://code.google.com/p/libgdx/wiki/ProjectSetupNew。建立您的项目的链接。

http://www.youtube.com/watch?feature=player_embedded&v=mmH05k6HFsI。指向如何设置ligdx的教程的YouTube链接。

https://groups.google.com/forum/?fromgroups=#!topic/android-platform/abxNKTFkuj8。

"Conversion to Dalvik format failed with error 1" on external JAR

检查，如果你有一个包含相同的包和类的构建路径我的两个JAR文件。删除一个包。

尝试清理并构建项目。

Answer 2

在我的情况下，Eclipse在核心项目src中复制了gdx-backend-gwt.jar，当我删除它时，问题已经消失。