android开发小技巧2（Dx 1 e…

最后一句话受用啊。网上查了好多，都不对口。查了一下，是Reference Libraries里多了一个android-8,我用的是3.0。多的就是它。删了android-8就好了。

原文地址：android开发小技巧2（Dx 1 error; aborting  Conversion to Dalvik format failed with error) 1 作者：bjutmobile

工程上有红叉，不知道少了什么，但是袋中却没有任何错误，运行程序报错为：  

trouble processing "javax/xml/datatype/DatatypeConstants$Field.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.

控制台：

[2011-07-29 11:02:55 - GalleryView] Dx 1 error; aborting

[2011-07-29 11:02:55 - GalleryView] Conversion to Dalvik format failed with error 1

其实这个错误很简单，你的jar包在工程里面不止一个，所以删除其他，留一个jar包即可，然后 重新运行工程。

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                                                                            2011.7.29