smack RosterListener无法在Android中运行

目前我正在使用Xmpp SMACK API进行聊天应用。但是当我调用addrosterListener时，我没有获得Presence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 arg0) { // Called when a roster entries are updated. } @Override public void entriesDeleted(Collection arg0) { // Called when a roster entries are removed. } @Override public void entriesAdded(Collection arg0) { // Called when a roster entries are added. } }); } } }); 

这个监听器是在创建活动时调用的。我想参考所有文件，当presense改变时，会自动调用这个监听器。

提前致谢。

Answer 1

 roster = connection.getRoster(); // Get all rosters Log.i("roster", "roster=" + connection.isConnected() + "-" + roster); Collection 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，您必须获得所有在线或离线用户。您可以与任何人聊天。