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我开发了简单的聊天应用程序，其中使用了 asmack lib 和 openfire 服务器。但是，当我开始使用相同的聊天时，我总是无法获得在线状态，因为该用户在 openfire 服务器上可用。

尝试了各种方法，测试了talk.google.com 服务器的相同代码，它运行良好。在这里，我正在设置用户的存在状态-

                  Presence presence  = new Presence(Presence.Type.available); ; 
                  presence.setStatus("Online, Programmatically!");
                  presence.setPriority(24);
                  presence.setMode(Presence.Mode.available);
                  connection.sendPacket(presence);
                  try {
                    Thread.sleep(10000);
                  } catch (InterruptedException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                  }

当我显示名册条目时，我的状态状态为空，并且状态类型不可用，我不知道为什么会发生，尝试了各种方法。我正在同一台机器上的两个不同模拟器上测试我的代码。是因为一样吗？

这是显示名册条目和存在类型的代码

                   Roster roster = connection.getRoster();
                  Roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.accept_all);
                  roster.addRosterListener(new RosterListener() {
                      // Ignored events public void entriesAdded(Collection<String> addresses) {}
                      public void entriesDeleted(Collection<String> addresses) {}
                      public void entriesUpdated(Collection<String> addresses) {}
                      public void presenceChanged(Presence presence) {
                          System.out.println("Presence changed: " + presence.getFrom() + " " + presence);
                      }
                      @Override
                      public void entriesAdded(Collection<String> arg0) {
                          // TODO Auto-generated method stub
                      }
                  });
                  try { Thread.sleep(5000); } catch (InterruptedException e) { }
                  Collection<RosterEntry> entries = roster.getEntries();                
                  for (RosterEntry entry : entries) {                           
                      Presence subscribed = new Presence(Presence.Type.subscribed); 
                      subscribed.setTo(entry.getUser()); 
                      connection.sendPacket(subscribed);

                      Log.d("JWP", "RosterEntry " + entry);
                      Log.d("JWP", "User: " + entry.getUser());
                      Log.d("JWP", "Name: " + entry.getName());
                      Log.d("JWP", "Status: " + entry.getStatus());
                      Log.d("JWP", "Type: " + entry.getType());               
                      Presence entryPresence = roster.getPresence(entry.getUser());
                      Log.d("JWP", "Presence Status: "+ entryPresence.getMode());
                      Log.d("JWP", "Presence Type: " + entryPresence.getType());

                      Presence.Type type = entryPresence.getType();
                      if (type == Presence.Type.available){
                          Log.d("JWP", "Presence AVIALABLE");
                          Log.d("JWP", "Presence : " + entryPresence);
                      }
                  }
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