android - 如何在xmpp android中设置和获取状态

Question

我是 android 和 xmpp 的新手..我正在尝试使用 xmpp 构建一个聊天应用程序。我想知道如何在 xmpp android 中设置我的状态以及其他用户的状态。我尝试使用他们提供的文档，但它不起作用..总是状态显示为空，类型为不可用。请发布详细答案。

  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);
        }
    });

Answer 1

关于 Xmpp 的文件请引用这里和 here for details

这里是查找用户状态的代码

 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;
}