Unable to execute dex: Multiple dex files define Lcom/squareup/okhttp/Address

The error occurs upon building a (on my case, it's PhoneGap) project running on Eclipse. This is caused of having two *.jar files inside the bin/dexedLibs directory. These files are generated every time you build your application.



Usually, multiple dex files error tells you that you are including the same class file from different sources.

Solution

To resolve this, simply do the following:

1. Open Project's Properties » Java Build Path » Order and Export.
2. Uncheck Android Private Libraries on the list
3. Clean and re-build your application

After doing the steps above, your project should now build and compile properly.

On my case, since my Eclipse is on auto-build, this is usually generated every time I restarted my IDE.