Android SDK r18 export release error

Question

I've 2 Android projects in workspace; first is libray project and other is application that refers to first project. Clean and Build is fine without any error. But when I try to export release build it gives error: "Conversion to Dalvik format failed with error 1"

Please, help.

Answer 1

Problem solved. Removed r18 and went for r17 and then every thing is fine.

Answer 2

SOLUTION 1:

Are you using proguard? if so.. you might want to replace the one in the sdk (C:\android-sdk\tools2\proguard*) with the latest version from here.

You can rename the old proguard to proguard2 and place the downloaded version in C:\android-sdk\tools2\proguard*

*Note: the folder of your AndroidSDK might be different

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SOLUTION 2:

If you had imported other projects as libraries for the main project you might check if those libraries are imported twice:

Those Images were extracted from this answer

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SOLUTION 3:

Create a new Android project with the same package name, copy all your resources, Manifest and source files, configure the external libraries and then try to compile the new project

Answer 3

That usually happens when you have android.jar accidentally included twice. Go into your project's Properties > Java Build Path > Libraries and remove the one that's not under the Android X.Y drop-down.