Android smack server receipt ack

问题:

I'm trying to make a chat application using XMPP. For this, I referred to this tutorial and successfully implemented it. But now I'm unable to get that particular message is received by the server and update my local DB. Please give me any idea how to do this.

I'm saving a message with chatId. So from which method of smack do I get this receipt message id?

回答1:

1. You need to save your messages by message id, you can get the id by message.getStanzaId().

2. You have to enable stream management.

   static {
       XMPPTCPConnection.setUseStreamManagementDefault(true);
       XMPPTCPConnection.setUseStreamManagementResumptiodDefault(true);
   }
   

3. when you send out a mesage, you add an ack listener for that message, like this.

   try {
       if (mConnection.isSmEnabled()) {
           try {
               mConnection.addStanzaIdAcknowledgedListener(message.getStanzaId(), new StanzaListener() {
                   @Override
                   public void processPacket(Stanza packet) throws NotConnectedException {
                       updateMessageStatus(packet);
                   }
               });
           } catch (StreamManagementException.StreamManagementNotEnabledException e) {
               e.printStackTrace();
           }
       }
       mConnection.sendStanza(message);
   } catch (NotConnectedException e) {
       e.printStackTrace();
   }
   

   Now, inside updateMessageStatus(packet) method, you find message in your database by id (packet.getStanzaId()) and update status from "pending" to "sent".

   Please take note that your server needs to enable stream management too.

回答2:

connection.setUseStreamManagement(true);

It'll enable stream management (XEP-198) on the client side.

http://xmpp.org/extensions/xep-0198.html#acking

NB: It'll only work if the server supports XEP-198.