Android基於XMPP Smack Openfire下學習開發IM(二)對分組、好友和頭像等一些操作

下面就一起來學習一下，如何查詢分組和添加分組等！

一、查詢所有分組

通過Roster來獲取所有分組，Roster可以通過connection.getRoster()來得到。

	/**
	 * 獲取所有組
	 * 
	 * @param roster
	 * @return 所有組集合
	 */
	public static List<RosterGroup> getGroups(Roster roster) {
		List<RosterGroup> grouplist = new ArrayList<RosterGroup>();
		Collection<RosterGroup> rosterGroup = roster.getGroups();
		Iterator<RosterGroup> i = rosterGroup.iterator();
		while (i.hasNext()) {
			grouplist.add(i.next());
		}
		return grouplist;
	}

二、添加分組

也一樣通過roster來添加分組，groupName 爲分組名。

	/**
	 * 添加一個分組
	 * 
	 * @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、查詢某個組裏面的所有好友

很簡單不解釋...

	/**
	 * 獲取某個組裏面的所有好友
	 * 
	 * @param roster
	 * @param groupName
	 *            組名
	 * @return
	 */
	public static List<RosterEntry> getEntriesByGroup(Roster roster,
			String groupName) {
		List<RosterEntry> Entrieslist = new ArrayList<RosterEntry>();
		RosterGroup rosterGroup = roster.getGroup(groupName);
		Collection<RosterEntry> rosterEntry = rosterGroup.getEntries();
		Iterator<RosterEntry> i = rosterEntry.iterator();
		while (i.hasNext()) {
			Entrieslist.add(i.next());
		}
		return Entrieslist;
	}

四、查詢所有好友信息

很簡單

	/**
	 * 獲取所有好友信息
	 * 
	 * @param roster
	 * @return
	 */
	public static List<RosterEntry> getAllEntries(Roster roster) {
		List<RosterEntry> Entrieslist = new ArrayList<RosterEntry>();
		Collection<RosterEntry> rosterEntry = roster.getEntries();
		Iterator<RosterEntry> i = rosterEntry.iterator();
		while (i.hasNext()) {
			Entrieslist.add(i.next());
		}
		return Entrieslist;
	}

五、獲取用戶VCard信息

	/**
	 * 獲取用戶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、獲取用戶頭像信息

通過Vcard來獲取用戶頭像信息，可以把 InputStream 轉換爲自己想要的類型，InputStream 轉Drawable 

這篇文章裏可以找到  http://blog.csdn.net/h7870181/article/details/8663760

	/**
	 * 獲取用戶頭像信息
	 * 
	 * @param connection
	 * @param user
	 * @return
	 */
	public static Drawable getUserImage(XMPPConnection connection, String user) {
		ByteArrayInputStream bais = null;
		try {
			VCard vcard = new VCard();
			// 加入這句代碼，解決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、無分組）

	/**
	 * 添加好友 無分組
	 * 
	 * @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 有分組
	 * 
	 * @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、刪除好友

	/**
	 * 刪除好友
	 * 
	 * @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("刪除好友：" + userName);
			System.out.println("User." + roster.getEntry(userName) == null);
			roster.removeEntry(entry);

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

九、查詢用戶 

serverDoMain 爲服務器域名

	/**
	 * 查詢用戶
	 * 
	 * @param connection
	 * @param serverDomain
	 * @param userName
	 * @return
	 * @throws XMPPException
	 */
	public static List<User> searchUsers(XMPPConnection connection,
			String serverDomain, String userName) throws XMPPException {
		List<User> results = new ArrayList<User>();
		System.out.println("查詢開始..............." + 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<Row> 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，則有返回,UserName一定非空，其他兩個若是有設，一定非空
		}
		return results;
	}

十、修改用戶頭像

	/**
	 * 修改用戶頭像
	 * 
	 * @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", "<TYPE>image/jpg</TYPE><BINVAL>" + encodedImage
				+ "</BINVAL>", true);

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

		vcard.save(connection);
	}