Définir un écouteur de session

L'exemple suivant suppose que vous créez cette classe dans le cadre d'une application qui nécessite un écouteur de session.
  1. Importez les classes et les interfaces requises.
    import net.rim.blackberry.api.bbm.platform.*;
    import net.rim.blackberry.api.bbm.platform.service.*;
    import net.rim.device.api.ui.component.*;
  2. Créez le cadre pour l'écouteur de session, définissant la signature de chaque méthode de rappel, puis implémentez la méthode comme requis. L'échantillon de code suivant affiche un dialogue qui informe l'utilisateur de la modification qui a eu lieu.
    class MySessionListener extends BBMPlatformSessionListener 
    {
        public void invitationAccepted(BBMPlatformConnection connection, BBMPlatformContact contact) 
        {
            Dialog.inform(contact.getDisplayName() + " has accepted the session invitation ");   
        }
        public void invitationDeclined(BBMPlatformConnection connection, String contactDisplayName)
        {
            Dialog.inform(contactDisplayName + " has declined the session invitation "));    
        }
        public void joinFailed(BBMPlatformConnection connection, BBMPlatformContact inviter, int reasonCode) 
        {
            Dialog.inform(inviter.getDisplayName() + " has rejected the session join request due to the reason: " + Integer.toString(reasonCode));
        }
        public void invitationFailed(BBMPlatformConnection connection, String inviteeName, int reasonCode) 
        {
            Dialog.inform(inviteeName + "cannot accept the channel invite due to the reason: " + Integer.toString(reasonCode));
        }
        public void contactsJoined(BBMPlatformSession session, BBMPlatformContactList contactList) 
        {
            if (contactList != null) 
            {
                Enumeration contacts = contactList.getAll();
                while (contacts.hasMoreElements()) 
                {
                    BBMPlatformContact contact = (BBMPlatformContact)contacts.nextElement();
                    Dialog.inform(contact.getDisplayName() + " has joined the session.");                            
                }               
            }             
        }
        public void contactsRemoved(BBMPlatformSession session, BBMPlatformContact removedBy, BBMPlatformContactList contactList) 
        {
            if (contactList != null) 
            {
                Enumeration contacts = contactList.getAll();
                while (contacts.hasMoreElements()) 
                {
                    BBMPlatformContact contact = (BBMPlatformContact)contacts.nextElement();
                    Dialog.inform(contact.getDisplayName() + " has been removed from the session by " + removedBy.getDisplayName());                            
                }               
            }
        }
        public void contactLeft(BBMPlatformConnection connection, BBMPlatformContact contact)
        {
            Dialog.inform(contact.getDisplayName() + " has left the session "); 
        }
        public void dataReceived(BBMPlatformConnection connection, BBMPlatformContact fromContact, BBMPlatformData data)
        { 
            Dialog.inform("session msg from:" + fromContact.getDisplayName() + " : " + data.getDataAsString()));                 
        }
        public void broadcastDataReceived(BBMPlatformSession session, BBMPlatformContact sender, BBMPlatformData data) 
        {
            Dialog.inform("broadcasting msg from:" + sender.getDisplayName() + " > " + data.getDataAsString()));    
        }
        public void invitationReceived(BBMPlatformConnection connection, BBMPlatformContact contact, String param)
        {
            Dialog.inform(contact.getDisplayName() + " is inviting me to join the session ")); 
        }
        public void invitationsSent(BBMPlatformConnection connection, int count) 
        {
            Dialog.inform(count + " session invitation(s) sent"));
        }
        public void sessionEnded(BBMPlatformContact contact) 
        {
            Dialog.inform(contact.getDisplayName() + " ends the session");
        }
        public void joinRequestReceived(BBMPlatformConnection connection, BBMPlatformIncomingJoinRequest request, String param)
        {
            _incomingJoinRequest = request;
            Dialog.inform("Incoming Session Join request received from " + request.getRequester().getDisplayName() + ". Please Accept or Decline",FOCUSABLE);                    
        } 
        public void joinRequestCancelled(BBMPlatformConnection connection, BBMPlatformIncomingJoinRequest request, int reasonCode)
        {
            Dialog.inform("The join request has been cancelled by " + request.getRequester().getDisplayName() + " for reason: " + reasonCode,FOCUSABLE);                    
        }  
    }

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