I don't have any background on push technology and I need to learn how to make it work on Android as quickly as possible. Unfortunately, I also don't know how to make a push on the server-side. My background here is absolute 0. :|
It would be nice if I could also learn how to create a push technology on the server side but right now, I badly need to learn how to receive a real time push (like streaming voice for voice chat) in Android first and I don't know any services online wherein I can connect my application to.
take a look to Android Cloud to Device Messaging and to nice tutorial by Lars Vogel about server and client implementation here.