DX error when starting Android Studio project

Question

I am trying to customize my Android Studio project with all its dependencies. But when I try to start my project, I get the following error messages:

Android Dex: [AndroidVI] Unable to execute DX Android Dex: [AndroidVI] com.android.dx.util.DexException: Multiple dex files define Lcom/androidquery/util/Constants; 

Can someone help me with this

Answer 1

Check if you have added the same jar files more than once.

If so, delete any of them from the libs folder and clean the project.

Answer 2

Check if your Proguard is working or not.