Conversion to Dalvik format failed with error 1

Android 的ADT还是有待改进，还是dex有问题，反正这个问题就是这么解决的：

Conversion to Dalvik format failed with error 1

解决办法是 Project > Clean... > Clean project selected below > Ok

另外当加入多个jar包也可能出现这个问题，可以将jar包放在assert中，然后用add lib加入jar包可以解决这个问题

if you came across the following error message:

"conversion to
dalvik format failed with error 1"

please check your project property:

Java Build Path->Libraries->JARs and
class folders on the build path

make sure you didn't manually include the
android.jar

then
clean>build

还有一个是因为代码编译错误的解决方法：：
http://blog.csdn.net/kome2000/archive/2009/08/11/4434438.aspx