多用户聊天中的 smack 存在监听器

Question

多用户聊天中的smack 状态监听器没有被调用。使用 Smack Api 登录，然后添加 roster.addRosterListener(mRoasterListener); 但是当聊天室的其他用户的存在发生变化时无法成功收听。我尝试了以下代码来让在线监听器工作：

connection.login(loginUser, passwordUser);

MultiUserChatManager manager = 

MultiUserChatManager.getInstanceFor(connection);

muc = manager.getMultiUserChat(roomID + "@" +context.getString(R.string.group_chat_id));

Log.d("Join User: ", "Already Created");

muc.join(Utilities.getUserPhoneNo(context));

muc.addMessageListener(mGroupMessageListener);

Roster roster = Roster.getInstanceFor(connection);//luna

roster.addRosterListener(mRoasterListener);//roasterListener

Log.d("Joined User Phone: ", " " + Utilities.getUserPhoneNo(context));

这个类来监听状态变化......

public class RoasterListener implements RosterListener{
        public RoasterListener(Context context){

        }

        @Override
        public void entriesAdded(Collection<String> collection) {

        }

        @Override
        public void entriesUpdated(Collection<String> collection) {

        }

        @Override
        public void entriesDeleted(Collection<String> collection) {

        }

        @Override
        public void presenceChanged(Presence presence) {
            System.out.println("Presence changed: " + presence.getFrom() + " " + presence);
        }
    }

我尝试了许多 stackoverflow 提供的链接，但都没有成功。 请帮忙！

Answer 1

对于多用户聊天，您不必使用名册，因为遇到名册中没有的人是很正常的。

要知道谁在 muc 中，首先询问居住者：

muc.join(user,password);

List<String> occupantsAtJoinTime = muc.getOccupants();

                    for (String occupant : occupantsAtJoinTime)
                    {
                        System.out.println("occupant: "+occupant);
                        //actions
                    }

然后，为了保持 Occupants 列表更新，将 DefaultParticipantStatusListener 注册到您的 muc 并定义该 Listner：

muc.addParticipantStatusListener(new CustomParticipantStatusListner());

定义为（如果需要，有很多方法可以实现）：

    public class CustomParticipantStatusListner extends DefaultParticipantStatusListener 
    {

        public void joined(String participant) 
        {
            System.out.println(participant + "just joined MUC");
//actions (add occupantsRightNow)
        }

        public void left(String participant)
        {
            System.out.println(participant + " just left MUC");
//actions (remove occupantsRightNow)
        }
    }

所有这一切都与 smack 4.1.7

Answer 2

这是关于多用户聊天中的管理角色修改。 此示例展示了如何向访问者授予语音并监听通知事件：

// User1 creates a room
  muc = new MultiUserChat(conn1, "myroom@conference.jabber.org");
  muc.create("testbot");

  // User1 (which is the room owner) configures the room as a moderated room
  Form form = muc.getConfigurationForm();
  Form answerForm = form.createAnswerForm();
  answerForm.setAnswer("muc#roomconfig_moderatedroom", "1");
  muc.sendConfigurationForm(answerForm);

  // User2 joins the new room (as a visitor)
  MultiUserChat muc2 = new MultiUserChat(conn2, "myroom@conference.jabber.org");
  muc2.join("testbot2");
  // User2 will listen for his own "voice" notification events
  muc2.addUserStatusListener(new DefaultUserStatusListener() {
      public void voiceGranted() {
          super.voiceGranted();
          ...
      }
      public void voiceRevoked() {
          super.voiceRevoked();
          ...
      }
  });

  // User3 joins the new room (as a visitor)
  MultiUserChat muc3 = new MultiUserChat(conn3, "myroom@conference.jabber.org");
  muc3.join("testbot3");
  // User3 will lister for other occupants "voice" notification events
  muc3.addParticipantStatusListener(new DefaultParticipantStatusListener() {
      public void voiceGranted(String participant) {
          super.voiceGranted(participant);
          ...
      }

      public void voiceRevoked(String participant) {
          super.voiceRevoked(participant);
          ...
      }
  });

  // The room's owner grants voice to user2
  muc.grantVoice("testbot2"); 

详情可参考http://web.mit.edu/svalente/lib/smack_3_0_4/documentation/extensions/muc.html。

Answer 3

首先，加入一个聊天室：

public MultiUserChat joinMultiUserChat(String user, String roomsName,
        String password) {
    if (getConnection() == null)
        return null;
    try {
        MultiUserChat muc = new MultiUserChat(getConnection(), roomsName
                + "@conference." + getConnection().getServiceName());
        DiscussionHistory history = new DiscussionHistory();
        history.setMaxChars(0);
        // history.setSince(new Date());
        muc.join(user, password, history,
                SmackConfiguration.getPacketReplyTimeout());
        Log.i("MultiUserChat", "Chat room【"+roomsName+"】joined........");
        return muc;
    } catch (XMPPException e) {
        e.printStackTrace();
        Log.i("MultiUserChat", "Chat room【"+roomsName+"】failed........");
        return null;
    }
}

然后，使用 MultiChatUser 发送消息：

try {
    multiUserChat.sendMessage(message);
} catch (XMPPException e) {
    e.printStackTrace();
}

添加监听器：

import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;

public class TaxiMultiListener implements PacketListener {
    @Override
    public void processPacket(Packet packet) {
        Message message = (Message) packet;
        String body = message.getBody();
    }
}

最后，使用 MultiUserChat 调用 Listener：

multiUserChat.addMessageListener(new TaxiMultiListener());