How to get custom attribute value from an XMPP XML message?

Question

Ok guys, simple question but pretty important to me.

so, other android client are sending this xml msg:

Answer 1

There exists another way to get attribute value, which defines the method UserInfo4XMPP by implementing ExtensionElement:

import org.jivesoftware.smack.packet.ExtensionElement;
public class UserInfo4XMPP implements ExtensionElement{
    public static final String NAMESPACE = "urn:xmpp:receipts";
    private String elementName = "received ";
    private String id = "";    
    @Override
    public String getElementName() {
        return elementName;
    }
        @Override
    public CharSequence toXML() {  
        return "";
    }
    @Override
    public String getNamespace() {
        return NAMESPACE;
    }
    public String getId()
    {
        return id;
    }
}

The function body is similar to DeliveryReceiptProvider.