how to add roster with subscription mode “both”

Question

i\'m using smack 3.1.0, and when i add a roster,i can\'t get subscription \"both\". who can help me? below is my code:

Roster.setDefaultSubscriptionMode(Rost         


        

Answer 1

Okay, I toiled hard at this for a couple of days and finally got things working. Thank you @Joe Hildebrand, your answer put me on the right track to solve this. I have implemented it with a manual subscription mode (ie. user needs to accept another user's request manually).

The server keeps pushing subscribe request to the user (upon re-login) if the user hasn't sent a subscribed or unsubscribed back. So what you can do is save the incoming subscribe requests locally in a list and display that as a "friend request list" for manual accept/reject. If your application gets restarted (and hence re-connects to server), the server will push subscribe requests again.

This is how it works:

• User1 sends subscribe presence to User2.
• Roster entry gets automatically created in User1's roster (but not in User2's roster).
• User2 receives subscribe request from User1.
• User2 sends back a subscribed presence to User2 (User2 > User1 subscription complete).
• User2 checks if User1 is in User2's roster. User1 is not in User2's roster. User2 sends back a subscribe presence to User1.
• Roster entry gets automatically created in User2's roster.
• User1 receives subscribe presence from User2.

• User1 checks if User2 is in User1's roster. User2 is in User1's roster. User1 sends back a subscribed presence to User2 (User2 > User1 subscription complete).

          final Presence newPresence = (Presence) packet;
          final Presence.Type presenceType = newPresence.getType();
          final String fromId = newPresence.getFrom();
          final RosterEntry newEntry = getRoster().getEntry(fromId);
  
          if (presenceType == Presence.Type.subscribe)
          {
              //from new user
              if (newEntry == null)
              {
                  //save request locally for later accept/reject
                  //later accept will send back a subscribe & subscribed presence to user with fromId
                  //or accept immediately by sending back subscribe and unsubscribed right now
              }
              //from a user that previously accepted your request
              else
              {
                  //send back subscribed presence to user with fromId
              }
          }