some demo
with sample code
http://seesharpgears.blogspot.in/2010/10/ksoap-android-web-service-tutorial-with.html
First things first, so you should now go ahead and download the KSOAP library from Sourceforge Google code:
http://code.google.com/p/ksoap2-android/downloads/detail?name=ksoap2-android-assembly-2.4-jar-with-dependencies.jar&can=2&q=
http://seesharpgears.blogspot.in/2010/11/basic-ksoap-android-tutorial.html