This is rather a daunting question, as it requires many details. We do extensively detail how to record from a web application using a physical device in our new documentation:
http://www.neotys.com/documents/doc/neoload/latest/en/html/index.html#4438.htm
We have implemented for consultation on how to use an emulator for the Android SDK bundle. It is not exactly a simple setup, depending on your requirements. I will research some possible steps for this platform that you might be able to follow.