XMPP presence认购

问题描述

在我的应用程序，当我把这个使用code请求任何朋友。

In my application when I send a request to any friend using this code..

try {               
                roster.createEntry(idExtension, nickname, null);
                roster.setSubscriptionMode(Roster.SubscriptionMode.manual);
                Presence subscribe = new Presence(Presence.Type.subscribe);
                subscribe.setTo(idExtension);               
                connection.sendPacket(subscribe);


                return true;
            } catch (XMPPException e) {
                System.err.println("Error in adding friend");
                return false;
            }

然后订阅说，在双方的朋友名册无。

then the subscription says "NONE" in both the friends rosters.

但应TO和FROM

但如果出于同样的过程中，我用这个code -

But if For the same process I use this code -

try {               
                roster.createEntry(idExtension, nickname, null);
                roster.setSubscriptionMode(Roster.SubscriptionMode.manual);
                Presence subscribed = new Presence(Presence.Type.subscribed);
                subscribed.setTo(idExtension);              
                connection.sendPacket(subscribed);


                return true;
            } catch (XMPPException e) {
                System.err.println("Error in adding friend");
                return false;
            }

然后，它给了我正确的结果，我应该在previous情况。

Then it gives me right result which i should get in the previous case.

请告诉我为什么我没有收到相同的订阅模式。

Please tell me why I am not getting the same in SUBSCRIBE mode.

感谢

推荐答案

我想你没有得到类型的含义，presence。

I guess you are not getting the meaning of type in Presence.

订阅 - 发送者希望订阅到收件人的  presence。

订阅 - 发送者已经允许接收者  收到他们的presence。

subscribed -- The sender has allowed the recipient to receive their presence.

所以，当你发送的第一个你请求用户让你订阅了presence事件，直到他已经不允许你这样做的订阅类型为无。

So when you send the first one you request a user to let you subscribe to his presence events and until he has not allowed you to do so the subscription type is none.

在第二种情况下，你允许用户订阅您的presence，那就是你给他的权限来听你的presence，因此你得到的订阅类型。

In second case you allowed the user to subscribe to your presence, that is you give him permission to listen to your presence, and thus you get the subscription type.

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