如何在XMPP中获取键入状态通知

Question

我正在尝试设置XMPP聊天应用程序。现在我可以在gmail和gmail之间发送消息。我想输入通知，例如用户输入的内容或用户正在输入,,, 就像那样。我正在使用主类和Message侦听器类。

主要类

public class XMPPChatDemoActivity extends Activity {

    //Object of Custom class
    MessageListener messageListener = new MessageListenerImpl();

    private void setConnection(XMPPConnection connection) {
        this.connection = connection;

        ChatManager chatmanager = connection.getChatManager();
        Chat newChat = chatmanager.createChat("user@gmail.com", messageListener);
        try {
            newChat.sendMessage("Howdy!");
        }
        catch (XMPPException e) {
            System.out.println("Error Delivering block");
        }

消息监听器类

public class MessageListenerImpl implements MessageListener , ChatStateListener{

    @Override
    public void stateChanged(Chat arg0, ChatState arg1) {
        // TODO Auto-generated method stub

    }

    @Override
    public void processMessage(Chat arg0, Message arg1) {
        // TODO Auto-generated method stub

        System.out.print("here");

        if (ChatState.composing.equals(arg1)) {
            Log.d("Chat State",arg0.getParticipant() + " is typing..");
        } else if (ChatState.gone.equals(arg1)) {
            Log.d("Chat State",arg0.getParticipant() + " has left the conversation.");
        } else {
            Log.d("Chat State",arg0.getParticipant() + ": " + arg1.getFrom());
        }

    }

}

每当user@gmail.com开始在我们的对话中输入内容时，我需要在Log中收到一条消息。但它不会来。它正在发送消息..

我在堆栈溢出中尝试了另一个答案。 How to know Typing Status in XMPP openfire using Smack

但是从这一点上我也没有得到解决方案。请帮帮我。