在我的例子中，把我的手机从USB上拔下来就可以修复这个错误。

对于我来说，在我的构建路径中出现了一个额外的JAR引用。我把这个删了，现在可以用了。

我也遇到过同样的问题，但这些方法都不起作用。 最后，我在控制台中看到错误是由于重复的类(一个在现有项目中，一个在添加的jar文件中):

java.lang.IllegalArgumentException: already added: package/MyClassclass;
[2011-01-19 14:54:05 - ...]: Dx1 error; aborting
[2011-01-19 14:54:05 - ...] Conversion to Dalvik format failed with error 1

因此，请检查您是否在项目中添加了带有重复类的jar。 如果是，请尝试移除其中一个。

这对我很管用。

上面列出的解决方案没有一个对我有效。

这就是我遇到的问题:

I added the jSoup external JAR file to my project's path by first putting it in a source folder called "libs", and then right clicking on it, Build Path -> add to build path. This threw the Dalvik conversion error. It said I had "already included" a class from that JAR file. I looked around the project's directory and found that the place where it was "already included" was in fact the bin directory. I deleted the JAR file from the bin directory and refreshed the project in Eclipse and the error went away!

最好将所有*.jar文件包含在项目文件夹树的“lib”目录中。这样，您就不需要通过转到项目的属性来定义构建路径。"lib"已经是一个构建路径

依赖项上的谷歌API会导致此问题。拆卸后工作良好。