}
// Connection已通过验证
this.connection = conn;
//添加的一个listener,截获所有的message with error的信息
connection.addPacketListener(new MsgErrorListener(),
new AndFilter(new PacketTypeFilter(Message.class),new MessageTypeFilter(Message.Type.error)));
//添加监听所有的发送的msg,用来存储为聊天记录
connection.addPacketSendingListener(new AllOutgoingMsgListener(), new PacketTypeFilter(Message.class));
//添加监听所有的收到的非error类型的message
connection.addPacketListener(new AllIncomingMsgListener(),
new AndFilter(new PacketTypeFilter(Message.class),
new NotFilter(new MessageTypeFilter(Message.Type.error))));
//监听所有的收到的Message,对其调用IncomingMessageListener
connection.addPacketListener(new PacketListener(){
@Override