Processing – Error building Android for Processing project

Problem:
Error while building an Android for Processing v2.x project:
“Error from inside the Android tools, check the console.”

Fix:
Edit the file “C:\adt-bundle-windows-x86-20131030\sdk\tools\ant\build.xml
(Of course adjust the path to where your Android SDK is living… this fix works for Mac OSX too)

<!-- RvG changed to true -->
<property name="dex.disable.merger" value="true" />

If that doesn’t fix the problem have a look here:
http://forum.processing.org/one/topic/android-problems.html