Library does not have JAVADOC code complete assistance

Library does not have JAVADOC code complete assistance

I wrote my own android library. To test it, I wrote a tester application,
added the JAR to it and also added it to the build path (in Eclipse).
Eclipse's auto completion shows the (public) API methods (which is good)
but the following are missing:
The Javadoc description of the methods.
The method parameter names
MyLibrary.myapimethod(String arg0, String arg1)
instead of
MyLibrary.myapimethod(String param, String anotherparam)
The code is built using ant and obfuscated using Proguard.
How do I make sure that code-completion of my library's parameter names
and documentation are available to users (e.g. the tester app)?