Java 类org.jivesoftware.smack.PresenceListener 实例源码

/**
 * Adds a new {@link StanzaListener} that will be invoked every time a new presence
 * is going to be sent by this MultiUserChat to the server. Stanza(/Packet) interceptors may
 * add new extensions to the presence that is going to be sent to the MUC service.
 *
 * @param presenceInterceptor the new stanza(/packet) interceptor that will intercept presence packets.
 */
public void addPresenceInterceptor(PresenceListener presenceInterceptor) {
    presenceInterceptors.add(presenceInterceptor);
}

/**
 * Adds a stanza(/packet) listener that will be notified of any new Presence packets
 * sent to the group chat. Using a listener is a suitable way to know when the list
 * of occupants should be re-loaded due to any changes.
 *
 * @param listener a stanza(/packet) listener that will be notified of any presence packets
 *      sent to the group chat.
 * @return true if the listener was not already added.
 */
public boolean addParticipantListener(PresenceListener listener) {
    return presenceListeners.add(listener);
}

/**
 * Removes a stanza(/packet) listener that was being notified of any new Presence packets
 * sent to the group chat.
 *
 * @param listener a stanza(/packet) listener that was being notified of any presence packets
 *      sent to the group chat.
 * @return true if the listener was removed, otherwise the listener was not added previously.
 */
public boolean removeParticipantListener(PresenceListener listener) {
    return presenceListeners.remove(listener);
}