It seems that no one of the pure java pdf libraries will work with android because they use libraries that aren’t supported by android. I think I read that iText is interested in doing a port to android but thinks that google should support them if they did, haven’t got a source on that though.
Here is a project in work for writing pdfs in android: sourceforge.net/projects/apwlibrary
Haven’t tried it and it says that it only does simple pdfs