StreamManagement.java

/*
* The code is taken from ProjectMaxs. For details please look - https://github.com/ProjectMAXS/maxs/blob/73043374fa4ec0ce0d881bb8d42a241ef80fa9eb/transport-xmpp/src/org/projectmaxs/transport/xmpp/xmppservice/XMPPService.java
*/

xmppConnection.addStanzaAcknowledgedListener(new StanzaListener() {
    @Override
    public void processPacket(Stanza packet) throws SmackException.NotConnectedException, InterruptedException {
        removePacket(packet.getStanzaId());
    }
});

xmppConnection.setUseStreamManagement(true);
xmppConnection.setUseStreamManagementResumption(true);