I have a simple android app and I am testing it using my phone. So, there are two ways to do that :
Problem:
A more precise explanation/approach is the following:
Make sure you do
adb install -r bin/<>-debug.apk
from both from tests and the app directory.
After that ant test
should work from the tests directory. (My guess is that there was a missing dependency to the app from test package - which was causing the failure).
Other than the above little hack, rest of the procedure I followed came from the android testing introduction on http://developer.android.com/.