NoClassDefFoundError when running Instrumentation test with ant

Question

(This is an Android SDK tools v17 problem. Expect a fix in v18)

I have a test target project A, and a tester project B.

Project A has FlurryAgent.jar in it

Answer 1

Since this post was the first in search engine results when I entered "java.lang.NoClassDefFoundError: com.flurry.android.FlurryAgent" and my issue was not related to Ant at all, I thought I'd add some info for people who might be scratching their heads after re-installing the ADT.

Basically, in Eclipse when you add an external library in the Java Build Path dialog, don't forget to also switch to the Order and Export tab and tick that library's name in the list. This is needed so that the library is found at run-time, not only at compile time :)