Chat application with android

[jas preet]

I have an web based application . Its client is an android user. I want to create a chat between an android and my application. The andriod sends the request to which the server response. I do not know how to approach this . Any help will be appreciated

[Piyush Patel]

you need to use SIP protocol for chat user presence & use RTP protocol to send chat message to server. google on JAINSIP.