java.lang.IllegalArgumentException: already added: Lorg/hamcrest/BaseDescription; Conversion to Dalvik format failed with error 1

Question

First of all, there are at least 2 postings with the same problem but these solutions don\'t work anymore, at least not in my installation.

I\'m using m2e with Eclip

Answer 1

I tried the above solutions and still got the error. Only after some more try and error I found out that the hamcrest classes are also contained in another jar: mockito (I was not yet aware that mockito won't work with my instrumentation tests)

So I solved my problem by removing mockito-all.jar from my dependencies and excluded hamcrest from the transitive dependencies of junit like this:

 
    junit
    junit
    test
    4.10
    
        
            hamcrest-core
            org.hamcrest
        
    
  

This exclusion may also be needed for commons-logging (as of the date of writing) because otherwise the apk builder will protest about old classes.