Android does not provide any SOAP library .... org.apache.http.
Ya, thats true. SOAP is very complex for Android, but it can achieve your goal.
1) http://android.amberfog.com/?p=45
2) How to call the SOAP web service on Android
3) http://www.anddev.org/calling_a_web_service_from_android-t348.html
for the calling purpose this (4) will help you.
4) http://xebee.xebia.in/2010/06/29/soap-web-service-call-in-android/