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

Rewriting @mschonaker's answer to be a little more clear.

Both users need to subscribe to each other and accept the subscription request they received. Let's call them Alice and Bob. Alice sends a subscription request to Bob:

Presence subscribe = new Presence(Presence.Type.subscribe);
subscribe.setTo('bob@example.com');
connection.sendPacket(subscribe);

When Bob receives the request, he approves it:

Presence subscribed = new Presence(Presence.Type.subscribed);
subscribed.setTo('alice@example.com');
connection.sendPacket(subscribed);

Bob may also be interested in Alice's presence, so he subscribes to her:

Presence subscribe = new Presence(Presence.Type.subscribe);
subscribe.setTo('alice@example.com');
connection.sendPacket(subscribe);

And Alice needs to approve Bob's request:

Presence subscribed = new Presence(Presence.Type.subscribed);
subscribed.setTo('bob@example.com');
connection.sendPacket(subscribed);

Section 3.1 of RFC6121 is the current best reference for how this works.