multiple dex files - conversion to dalvik format failed

Question

I'm making a game on libgdx and it all worked fine yesterday, but now it's messed up.

[2014-09-18 00:38:39 - Dex Loader] Unable to execute dex: Multiple dex files define Lcom/badlogic/gdx/Application$ApplicationType;
[2014-09-18 00:38:39 - birdy-android] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/badlogic/gdx/Application$ApplicationType;

That is the error I got. I've been trying to find an answer and I can't find one that works anywhere.

Answer 1

That happens when you define the same class (with same path) twice. In this case the class is:

Multiple dex files define Lcom/badlogic/gdx/Application$ApplicationType;

Which is in the Libgdx core jar.

So 2 possible escenarios:

• You created your project manually and added the jar in your build path twice.

• You created your project using Gradle and you mistakenly added the jar as a dependency twice:

  project(":core") {
      apply plugin: "java"
  
      dependencies {
          compile "com.badlogicgames.gdx:gdx:$gdxVersion"
          compile "com.badlogicgames.gdx:gdx:$gdxVersion" <--
          compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
      }
  }
  

So, just delete the cloned dependency, or fix your build path to not add the jar twice. (You can always remake the project and copy your old code though).