Just open Expand the project's root node.Show in eclipse
You can now see a Bin. Just Expand it Now you can see a folder named
"dexedLibs". Just Expand that node. You can see some libraries. Just
check for any duplicate entries. (Please check it carefully and make
sure you are not deleting any unduplicate entry).
Eg:-
You can find like this.
bin/dexedLibs/android-support-v4-773c629b8eb1e89bdd821a2c07db8998.jar
If you have found any duplicate entries.Just delete that and rebuild your project.
It seems this will help you.