killed 3 hours for this error. Search the forums did not give (anything you want) compiles on the emulator well. but for export if the problem
com.android.ide.eclipse.adt.internal.build.DexException: Conversion to Dalvik format failed with error 1
at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:663)
at com.android.ide.eclipse.adt.internal.project.ExportHelper.exportReleaseApk(ExportHelper.java:204)
at com.android.ide.eclipse.adt.internal.project.ExportHelper$2.run(ExportHelper.java:301)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
help those who faced