WhatsApp like group chat in android using xmpp and asmack [closed]

Question

I am developing a clone of WhatsApp for which i need to implement group chat like in WhatsApp. i am using Openfire as a server and Asmack on android end. Now i have implemented group chat following this guide but this is no way like WhatsApp. Users don't persist in the room and leave the room as soon as they go offline. There's no mechanism for offline messaging like in 1-1 chat.So basically my question is how can i implement group chat using asmack that has following features:

• groups can persist user no matter if they are online or not.
• deliver offline messages to a group member(when he comes online).

Do i need to customize the server side or the client side? Any idea how WhatsApp like group chat can be done with asmack and Openfire will be highly appreciated.

Jerkwater

I also want to make such pp, just for learning purpose, as I am student. If you have few minutes, Can you please start the chat room ? – Muriah

@Muriah sorry i was busy in some other project. I will resume this project in a couple of days. I have created a chat room here.See you there. – Jerkwater

@TalhaMir hi! Even I have ran into same problem, did you manage to get it done ? If yes, Please let me know how you did it? – Hysterectomize

@Muriah hi! did you manage to get it done ? – Hysterectomize

@Hysterectomize no, I didn't get a chance to work on it afterwards. – Jerkwater