Conversion to Dalvik format failed with error 1 Solution? [duplicate]

Answer 1

While setting up the DropBox example app, I encountered this error.

The solution was to remove all JAR files from the build path, delete everything inside /libs, paste the required JAR files back in, and add them to the build path again.

Answer 2

For those of you reaching here in the last days (see this post date), the last upgrades to ADT 14 have been causing every android project which uses an android library project to fail building with that error. I've tried this solution and it worked for me.

Tu sum it up, if you are using android library projects:
Package Explorer, right-click->Remove From Build Path (ok to unlink), on all the XXX_src in your projects of your workspace.

Answer 3

If you are using Android SDK tools revision 12, check this link: Android SDK tools revision 12 has problem with Proguard => error conversion to Dalvik format failed with error 1

Simply cleaning, reimporting, removing libs won't work! Replacing tools directory with v11 was the only solution for me!

Answer 4

Please see this thread "Conversion to Dalvik format failed with error 1" on external JAR

more information here: Reason of Conversion to dalvik format failed with error 1

Answer 5

Upgrade your Proguard to its latest version i.e., 4.7... Dowload the zip from http://sourceforge.net/projects/proguard/files/latest/download?source=files .... then copy the "lib" and "bin" folders from the zip to your sdk/tools/proguard/ to replace the default or say old "bin" and "lib" .... try exporting your project once again...

Answer 6

Had same problem after upgrade to Eclipse Indigo. The whole errors list started with

 [dx] java.lang.IllegalArgumentException: already added: <some library>;

and ended with

  Conversion to Dalvik format failed with error 1

The solution:

• Right-click on project and select "Properties"
• Select "Java Build Path" on left tree
• Select "Library" tab on top
• You will, probably see this library in the list (it is not jar, but Library!, the jar is below)
• Delete it.