What have you tried and what data you did not get from the service? You need to debug the application to know cause. Some times simple mistakes causes the root problem.
Did u checked this link
Calling ASP.NET Webservice (ASMX) from an Android Application, the Simplest Way[
^]
Its a great article from Code Project. Just follow all the steps mentioned clearly and let us know.
One more question for you? Did u tested that service accessing from other kind of application like from dotNET or Java or PHP? To cross check that there is no problem with the service.
try these links and let us know.
Thanks
Ganesh
Submit an article or tip