error when exporting. apk
<p>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</p>

<pre><code>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)
</code></pre>

<p>help those who faced</p>
