XMPP Smack Openfire下学习开发IM(二)对分组、好友和头像等一些操作

下面就一起来学习一下，如何查询分组和添加分组等！

一、查询所有分组

通过Roster来获取所有分组，Roster可以通过connection.getRoster()来得到。

"white-space:pre">  /**
     * 获取所有组
     *
     * @param roster
     * @return 所有组集合
     */
    public static List getGroups(Roster roster) {
        List grouplist = new ArrayList();
        Collection rosterGroup = roster.getGroups();
        Iterator i = rosterGroup.iterator();
        while (i.hasNext()) {
            grouplist.add(i.next());
        }
        return grouplist;
    }

二、添加分组

也一样通过roster来添加分组，groupName 为分组名。

"white-space:pre">  /**
     * 添加一个分组
     *
     * @param roster
     * @param groupName
     * @return
     */
    public static boolean addGroup(Roster roster, String groupName) {
        try {
            roster.createGroup(groupName);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

三、查询某个组里面的所有好友

很简单不解释...

"white-space:pre">  /**
     * 获取某个组里面的所有好友
     *
     * @param roster
     * @param groupName
     *            组名
     * @return
     */
    public static List getEntriesByGroup(Roster roster,
            String groupName) {
        List Entrieslist = new ArrayList();
        RosterGroup rosterGroup = roster.getGroup(groupName);
        Collection rosterEntry = rosterGroup.getEntries();
        Iterator i = rosterEntry.iterator();
        while (i.hasNext()) {
            Entrieslist.add(i.next());
        }
        return Entrieslist;
    }

四、查询所有好友信息

很简单

"white-space:pre">  /**
     * 获取所有好友信息
     *
     * @param roster
     * @return
     */
    public static List getAllEntries(Roster roster) {
        List Entrieslist = new ArrayList();
        Collection rosterEntry = roster.getEntries();
        Iterator i = rosterEntry.iterator();
        while (i.hasNext()) {
            Entrieslist.add(i.next());
        }
        return Entrieslist;
    }

五、获取用户VCard信息

"white-space:pre">  /**
     * 获取用户VCard信息
     *
     * @param connection
     * @param user
     * @return
     * @throws XMPPException
     */
    public static VCard getUserVCard(XMPPConnection connection, String user)
            throws XMPPException {
        VCard vcard = new VCard();
        vcard.load(connection, user);
        return vcard;
    }

六、获取用户头像信息

通过Vcard来获取用户头像信息，可以把 InputStream 转换为自己想要的类型，InputStream 转Drawable 

这篇文章里可以找到  http://blog.csdn.net/h7870181/article/details/8663760

"white-space:pre">  /**
     * 获取用户头像信息
     *
     * @param connection
     * @param user
     * @return
     */
    public static Drawable getUserImage(XMPPConnection connection, String user) {
        ByteArrayInputStream bais = null;
        try {
            VCard vcard = new VCard();
            // 加入这句代码，解决No VCard for
            ProviderManager.getInstance().addIQProvider("vCard", "vcard-temp",
                    new org.jivesoftware.smackx.provider.VCardProvider());

            vcard.load(connection, user+"@"+connection.getServiceName());

            if (vcard == null || vcard.getAvatar() == null)
                return null;
            bais = new ByteArrayInputStream(vcard.getAvatar());

        } catch (Exception e) {
            e.printStackTrace();
        }
        if (bais == null)
            return null;
        return FormatTools.getInstance().InputStream2Drawable(bais);
    }

七、添加好友（有、无分组）

"white-space:pre">  /**
     * 添加好友 无分组
     *
     * @param roster
     * @param userName
     * @param name
     * @return
     */
    public static boolean addUser(Roster roster, String userName, String name) {
        try {
            roster.createEntry(userName, name, null);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 添加好友 有分组
     *
     * @param roster
     * @param userName
     * @param name
     * @param groupName
     * @return
     */
    public static boolean addUser(Roster roster, String userName, String name,
            String groupName) {
        try {
            roster.createEntry(userName, name, new String[] { groupName });
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

八、删除好友

"white-space:pre">  /**
     * 删除好友
     *
     * @param roster
     * @param userName
     * @return
     */
    public static boolean removeUser(Roster roster, String userName) {
        try {
            if (userName.contains("@")) {
                userName = userName.split("@")[0];
            }

            RosterEntry entry = roster.getEntry(userName);
            System.out.println("删除好友：" + userName);
            System.out.println("User." + roster.getEntry(userName) == null);
            roster.removeEntry(entry);

            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

九、查询用户 

serverDoMain 为服务器域名

"white-space:pre">  /**
     * 查询用户
     *
     * @param connection
     * @param serverDomain
     * @param userName
     * @return
     * @throws XMPPException
     */
    public static List searchUsers(XMPPConnection connection,
            String serverDomain, String userName) throws XMPPException {
        List results = new ArrayList();
        System.out.println("查询开始..............." + connection.getHost()
                + connection.getServiceName());

        UserSearchManager usm = new UserSearchManager(connection);

        Form searchForm = usm.getSearchForm(serverDomain);
        Form answerForm = searchForm.createAnswerForm();
        answerForm.setAnswer("userAccount", true);
        answerForm.setAnswer("userPhote", userName);
        ReportedData data = usm.getSearchResults(answerForm, serverDomain);

        Iterator it = data.getRows();
        Row row = null;
        User user = null;
        while (it.hasNext()) {
            user = new User();
            row = it.next();
            user.setUserAccount(row.getValues("userAccount").next().toString());
            user.setUserPhote(row.getValues("userPhote").next().toString());

            System.out.println(row.getValues("userAccount").next());
            System.out.println(row.getValues("userPhote").next());
            results.add(user);
            // 若存在，则有返回,UserName一定非空，其他两个若是有设，一定非空
        }
        return results;
    }

十、修改用户头像

"white-space:pre">  /**
     * 修改用户头像
     *
     * @param connection
     * @param f
     * @throws XMPPException
     * @throws IOException
     */
    public static void changeImage(XMPPConnection connection, File f)
            throws XMPPException, IOException {

        VCard vcard = new VCard();
        vcard.load(connection);

        byte[] bytes;

        bytes = getFileBytes(f);
        String encodedImage = StringUtils.encodeBase64(bytes);
        vcard.setAvatar(bytes, encodedImage);
        vcard.setEncodedImage(encodedImage);
        vcard.setField("PHOTO", "image/jpg" + encodedImage
                + "", true);

        ByteArrayInputStream bais = new ByteArrayInputStream(vcard.getAvatar());
        FormatTools.getInstance().InputStream2Bitmap(bais);

        vcard.save(connection);
    }