smack RosterListener不能在Android上工作

Question

目前我正在使用Xmpp SMACK API进行聊天应用程序，但是当我打电话给addrosterListener时，我没有获得存在当前状态。我必须参考 http://www.igniterealtime.org/builds/smack/docs/3.2.2/javadoc/org/jivesoftware/smack/RosterListener.html。请帮助我。

roster.addRosterListener(new RosterListener() { 
         @Override 
         public void presenceChanged(Presence presence) { 


          Log.d("pewsence ", "pewsence Status: " + presence.getFrom()); 
          Log.d("pewsence ", "pewsence to Status: " 
            + presence.getTo() + " " + presence); 

          // Called when the presence of a roster entry is 
          // changed 
         } 

         @Override 
         public void entriesUpdated(Collection<String> arg0) { 
          // Called when a roster entries are updated. 

         } 

         @Override 
         public void entriesDeleted(Collection<String> arg0) { 
          // Called when a roster entries are removed. 
         } 

         @Override 
         public void entriesAdded(Collection<String> arg0) { 
          // Called when a roster entries are added. 
         } 
        }); 
       } 
      } 
     }); 

这个监听器是打电话的时候，活动created.I认为指的是所有的文件，这个监听器时自动调用presense会发生变化。

在此先感谢。

Answer 1

roster = connection.getRoster(); 

      // Get all rosters 
      Log.i("roster", "roster=" + connection.isConnected() + "-" + roster); 
      Collection<RosterEntry> entries = roster.getEntries(); 
      // loop through 
      for (RosterEntry entry : entries) { 
       Presence entryPresence = roster.getPresence(entry.getUser()); 
       Presence.Type userType = entryPresence.getType(); 

      } 

使用此代码，您必须获取所有在线或离线用户。您可以与任何人聊天。