Unable to execute dex: Multiple dex files define

Question

I know this question has been asked here a few times before. But i haven't seen any possible solution yet. Before i make the project 'Run as Android Application' , if i do not clean it, i receive the following error and have to restart Eclipse ... and clean again.

Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define
     Lcom/jstun/core/attribute/MessageAttributeInterface;

com.jstun.core... is a part of my src folder, of course i can't remove it. And even if i remove that package, another package will show up as an error like:

Unable to execute dex: Multiple dex files define
     Landroid/support/v4/app/ActivityCompatHoneycomb;

I've seen this error since updating to ADT 15, i'm using Eclipse Galileo on Ubuntu Do you have any idea? Thanks for any reply!

Answer 1

ULTRA simple solution and finest:

Remove everything in Right Click Main Project's Folder -> Properties -> Java Build Path except Android X.Y (where X.Y is the version in android). Clean, and Build. Done!

Make sure before of that to have a single android-support-v4.jar.

Answer 2

I have same issue, what i tried is:

1. List item
2. Open Project Build Path,
3. Select "Libraries" tab,
4. Remove all library except the Android Library
5. Adding all required JARs Files,
6. And Done!

It works for me, thanks.

Answer 3

I have had this issue and that doesn't mean, that the same library is loaded many times but System is trying to load a class with the same name and possibly same package name simultaneously, i.e.

• com.pack1.de and Class Geometry of library1.jar

and another

• com.pack1.de and Class Geometry of library2.jar.

How should you approach? You should analyze which methods are being used, a method of library1.jar or library2.

There are 2 Solutions,

1. Rename a packagename and then dalvik interprets, that they are distinct classes
2. Or if you want to risk, purge the class, which doesn't contain the methode, which we really use.

I hope that has clarified this often asked question.

Answer 4

To me, just go to Project Properties >> Java Build Path >> Order and Export. Uncheck all external library, as the image bellow. It work for me. Hope this help.

Answer 5

• Right click on project and go to build Path>configuration build path
• Select library tab and click on support-v4 library and click on remove
• Click on OK

and then clean your project and run it will work :-)

Answer 6

I removed Android dependencies from build path and it worked.