Android XMPP响应IQ不'；t显示或带回IQ响应

在ejabberd服务器后面运行以下Android代码，并执行其任务。然而，这不会出现在ejabberd日志/调试文件中，并且/或者IQ响应不会返回到客户端设备（smack 4.4.2）。我如何获得IQ响应，我们是否需要在该代码中添加代码以返回IQ结果/响应？或者我错过了什么

DataForm.Builder xep0004 = DataForm.builder(DataForm.Type.submit);  //new DataForm(DataForm.Type.submit);
        TextSingleFormField.Builder token = FormField.builder("token");
        token.setValue(App.user_settings.getFirebaseToken(App.mContext));
        TextSingleFormField.Builder device_id = FormField.builder("android-id"); //new FormField("device-id");
        device_id.setValue(App.user_settings.getECCID(App.mContext));

        xep0004.addField(token.build());
        xep0004.addField(device_id.build());

        IQ pushStanza = new IQ("command", "http://jabber.org/protocol/commands") {
            @Override
            protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
                xml.attribute("action", "execute");
                xml.attribute("node", "register-push-fcm");
                xml.setEmptyElement();
                return xml;
            }
        };
        pushStanza.setType(IQ.Type.set);
        pushStanza.setTo(JidCreate.from("p2.server.com"));
        pushStanza.setFrom(connection.getUser());
        pushStanza.addExtension(xep0004.build());
        
        if (connection.isSmEnabled()) {
            try {
                connection.addStanzaIdAcknowledgedListener(pushStanza.getStanzaId(), new StanzaListener() {
                    @Override
                    public void processStanza(Stanza stanza) throws NotConnectedException, InterruptedException, SmackException.NotLoggedInException {
                        Log.e("stanza result", stanza.toXML().toString());
                       // registerTokenToXmpp1();
                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        connection.sendStanza(pushStanza);