Android Plugin Extending UnityPlayer causing duplicate class

Questions & Answers
1

I have problem with duplicate dex when i copy unity classes.jar into my android plugin. I followed the link below where i need to put classes jar from unity to the plugin library.

I know about the duplicate class, but this is not about duplicate class from plugins i have in my project.

Extending the UnityPlayerActivity Java Code
link text

2

Answer is here:
https://stackoverflow.com/questions/44468420/unity-error-unable-to-convert-classes-into-dex-format/44497498#44497498