Android ADD FRIEND using Smack

Question

I am new to the use of smack library and making one chatting application. I have made upto much extent and at this step i want to ask two questions.

1. when i

Answer 1

1, The problem is you must register a PacketListener for Presence.Type.subscribe before you connect to server. All the process of add and accept friend i answered in here

2, You can use UserSearch class to search for a specific user and if user is not found on server then you can assume that user is not registered on server.