“Conversion to Dalvik format failed with error 1” on external JAR

Question

In my Android application in Eclipse I get the following error.

UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already add

Answer 1

I've dealt with this problem when using Sherlock ActionBar library in my project. You could do the following step, it's work for me.

1. Right click to your project, select properties.
2. A dialog will show up, select 'Java build path' on the left menu.
3. Remove 'Android dependencies' and 'Android private libraries' on the right panel then click OK
4. Clean your project (select menu Project --> Clean)
5. Right click your project, select Android Tools -> Fix project properties
6. Clean project once again.
7. Restart your computer
8. Open eclipse and Export apk

Hope that will help you.