Referenced Libraries recent SDK/Eclipse Update Exception

Question

I just updated to Rev 17 SDK Tools and Rev 11 SDK Platform-tools and now none of my apps work. Every single referenced Library that I have gives the error:

NoClassDefFoundError

Anyone know why? I deleted and reinstalled the platform and tools but still doesn't work.

Have you cleaned your android library, and rebuild it, and clean yoru other Android projects that uses this library, then restart Eclipse, then compile your project. — James Black, Mar 24 '12 at 16:17
Also tried deleting metadata in the workspace and reimporting — easycheese, Mar 24 '12 at 16:24
possible duplicate of [Libraries in SDK 17 - android](http://stackoverflow.com/questions/9846586/libraries-in-sdk-17-android) — CommonsWare, Mar 24 '12 at 16:27

score 3 · Accepted Answer · edited May 23 '17 at 12:04

From here (comment):

Libraries in SDK 17 - android

Directs you to here:

http://android.foxykeep.com/dev/how-to-fix-the-classdefnotfounderror-with-adt-17

and the answer is in the comment

If you have references to jars that are not in the ‘libs’ folder, for example if you use ‘classpath variable’, you can resolve the NoClassDefFoundError issue with the new ADT 17 by exporting the references.

To export the references: simply go to “Properties > Java Build Path > Order and Export”, and check all the references you want exported.

Referenced Libraries recent SDK/Eclipse Update Exception

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