问题
I am new to android and xmpp..i am trying to build a chatting app using xmpp. I want to know How to set my presence and also get other users presence in xmpp android. i tried with their provided documentation but it is not working ..always status shows null and type as unavailable. please post a detail answer.
Roster roster = Roster.getInstanceFor(connection);
//Get all rosters
if (!roster.isLoaded())
try {
roster.reloadAndWait();
} catch (SmackException.NotLoggedInException | SmackException.NotConnectedException | InterruptedException e) {
e.printStackTrace();
}
Collection<RosterEntry> entries = roster.getEntries();
//loop through
for (RosterEntry entry : entries) {
//example: get presence, type, mode, status
Presence entryPresence = roster.getPresence(entry.getUser());
StatusMode statusMode= StatusMode.createStatusMode(entryPresence);
// statusMode.getMode();
Presence.Type userType = entryPresence.getType();
Presence.Mode mode = entryPresence.getMode();
String status = entryPresence.getStatus();
retrieveState_mode(mode,entryPresence.isAvailable());
Log.d("####User status","...."+entry.getUser()+"....."+statusMode+"....."+entryPresence +" \ntype: "+"\n"+userType + "\nmode: " +mode + "\nstatus: " + status);// + "\nType: " + status.getType());
}
roster.addRosterListener(new RosterListener() {
// Ignored events public void entriesAdded(Collection<String> addresses) {}
public void entriesDeleted(Collection<String> addresses) {
}
@Override
public void entriesAdded(Collection<String> addresses) {
}
public void entriesUpdated(Collection<String> addresses) {
}
public void presenceChanged(Presence presence) {
System.out.println("Presence changed: " + presence.getFrom() + " " + presence);
}
});
回答1:
for document refer here about Xmpp and here for details
Here the code for finding user state
Presence availability = roster.getPresence(user);
Mode userMode = availability.getMode();
retrieveState_mode(availability.getMode(),availability.isAvailable());
public static int retrieveState_mode(Mode userMode, boolean isOnline) {
int userState = 0;
/** 0 for offline, 1 for online, 2 for away,3 for busy*/
if(userMode == Mode.dnd) {
userState = 3;
} else if (userMode == Mode.away || userMode == Mode.xa) {
userState = 2;
} else if (isOnline) {
userState = 1;
}
return userState;
}
回答2:
First of all, follow the steps bellow:
- Install the plugin:
presence - Go to
Server settings > Presence service > Presence visibility.
Then click onAnyone, as anyone may get presence information.
Then, implement the following code:
public void setUserPresence(int code) {
try {
/** 5 for offline, 0,1 for online, 3 for away,2 for busy*/
if (Config.conn1 == null)
return;
Presence presence;
if (Config.conn1 != null) {
Roster roster = Roster.getInstanceFor(Config.conn1);
roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.manual);
roster.createEntry(sharedPreferenceManager.getUsername() + "@" + Config.openfire_host_server_SERVICE, sharedPreferenceManager.getUsername(), null);
}
switch (code) {
case 0:
/* Presence pres = new Presence(Presence.Type.subscribe);
pres.setFrom("userA@domain");
Config.conn1.sendStanza(pres);*/
Config.conn1.sendPacket(new Presence(Presence.Type.available));
presence = new Presence(Presence.Type.available);
presence.setStatus(Constants.ONLINE);
presence.setPriority(24);
presence.setMode(Presence.Mode.available);
//roster = Roster.getInstanceFor(Config.conn1);
Config.conn1.sendStanza(presence);
Log.e("state", "Set online");
break;
case 1:
presence = new Presence(Presence.Type.available);
presence.setMode(Presence.Mode.chat);
Config.conn1.sendStanza(presence);
Log.e("state", "Set Q to me");
System.out.println(presence.toXML());
break;
case 2:
presence = new Presence(Presence.Type.available);
presence.setMode(Presence.Mode.dnd);
Config.conn1.sendStanza(presence);
Log.e("state", "Set the busy");
System.out.println(presence.toXML());
break;
case 3:
presence = new Presence(Presence.Type.available);
presence.setMode(Presence.Mode.away);
Config.conn1.sendStanza(presence);
Log.e("state", "Set off");
System.out.println(presence.toXML());
break;
case 4:
Roster roster1 = Roster.getInstanceFor(Config.conn1);
Collection<RosterEntry> entries = roster1.getEntries();
for (RosterEntry entry : entries) {
presence = new Presence(Presence.Type.unavailable);
// presence.setPacketID(Packet.ID_NOT_AVAILABLE);
presence.setFrom(Config.conn1.getUser());
presence.setTo(entry.getUser());
Config.conn1.sendStanza(presence);
System.out.println(presence.toXML());
}
// To the other client sends the same user stealth
presence = new Presence(Presence.Type.unavailable);
// presence.setPacketID(Packet.ID_NOT_AVAILABLE);
presence.setFrom(Config.conn1.getUser());
//presence.setTo(StringUtils.parseBareAddress(Config.conn1.getUser()));
Config.conn1.sendPacket(presence);
Log.e("state", "Set up stealth");
break;
case 5:
presence = new Presence(Presence.Type.unavailable);
presence.setStatus(Constants.OFFLINE);
presence.setPriority(24);
presence.setMode(Presence.Mode.away);
Config.conn1.sendStanza(presence);
Log.e("state", "Set offline");
break;
default:
break;
}
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG, "presence=" + e.toString());
}
}
get user presence using roster
Roster roster = Roster.getInstanceFor( conn1);
Presence presence; presence = roster.getPresence(users.get(i).getUser());
Log.e("Tag","presence.getStatus()>"+presence.getStatus());
来源：https://stackoverflow.com/questions/34367920/how-to-set-and-get-presence-in-xmpp-android