XMPP——Smack[4]状态，心情，头像更改

这里写完，最基本的IM功能也就完了，

还剩下个发送接收文件，离线消息扩展等等

呵呵，三天时间，看的不是很深入，欢迎大家补充呀

1. 修改自身状态

包括上线，隐身，对某人隐身，对某人上线

[java] view plaincopyprint?

1. public static void updateStateToAvailable(XMPPConnection connection)
2. {
3. Presence presence = new Presence(Presence.Type.available);
4. connection.sendPacket(presence);
5. }
7. public static void updateStateToUnAvailable(XMPPConnection connection)
8. {
9. Presence presence = new Presence(Presence.Type.unavailable);
10. connection.sendPacket(presence);
11. }
13. public static void updateStateToUnAvailableToSomeone(XMPPConnection connection,String userName)
14. {
15. Presence presence = new Presence(Presence.Type.unavailable);
16. presence.setTo(userName);
17. connection.sendPacket(presence);
18. }
19. public static void updateStateToAvailableToSomeone(XMPPConnection connection,String userName)
20. {
21. Presence presence = new Presence(Presence.Type.available);
22. presence.setTo(userName);
23. connection.sendPacket(presence);
25. }

2. 心情修改

[java] view plaincopyprint?

1. /**
2. * 修改心情
3. * @param connection
4. * @param status
5. */
6. public static void changeStateMessage(XMPPConnection connection,String status)
7. {
8. Presence presence = new Presence(Presence.Type.available);
9. presence.setStatus(status);
10. connection.sendPacket(presence);
12. }

3. 修改用户头像

有点麻烦，主要是读入图片文件，编码，传输之

[java] view plaincopyprint?

1. public static void changeImage(XMPPConnection connection,File f) throws XMPPException, IOException
2. {
4. VCard vcard = new VCard();
5. vcard.load(connection);
7. byte[] bytes;
9. bytes = getFileBytes(f);
10. String encodedImage = StringUtils.encodeBase64(bytes);
11. vcard.setAvatar(bytes, encodedImage);
12. vcard.setEncodedImage(encodedImage);
13. vcard.setField("PHOTO", "<TYPE>image/jpg</TYPE><BINVAL>"
14. + encodedImage + "</BINVAL>", true);
17. ByteArrayInputStream bais = new ByteArrayInputStream(
18. vcard.getAvatar());
19. Image image = ImageIO.read(bais);
20. ImageIcon ic = new ImageIcon(image);
24. vcard.save(connection);
26. }
28. private static byte[] getFileBytes(File file) throws IOException {
29. BufferedInputStream bis = null;
30. try {
31. bis = new BufferedInputStream(new FileInputStream(file));
32. int bytes = (int) file.length();
33. byte[] buffer = new byte[bytes];
34. int readBytes = bis.read(buffer);
35. if (readBytes != buffer.length) {
36. throw new IOException("Entire file not read");
37. }
38. return buffer;
39. } finally {
40. if (bis != null) {
41. bis.close();
42. }
43. }
44. }

4. 补充，用户状态的监听

即对方改变头像，状态，心情时，更新自己用户列表，其实这里已经有smack实现的监听器

[java] view plaincopyprint?

1. final Roster roster = Client.getRoster();
3. roster.addRosterListener(
4. new RosterListener() {
6. @Override
7. public void entriesAdded(Collection<String> arg0) {
8. // TODO Auto-generated method stub
9. System.out.println("--------EE:"+"entriesAdded");
10. }
12. @Override
13. public void entriesDeleted(Collection<String> arg0) {
14. // TODO Auto-generated method stub
15. System.out.println("--------EE:"+"entriesDeleted");
16. }
18. @Override
19. public void entriesUpdated(Collection<String> arg0) {
20. // TODO Auto-generated method stub
21. System.out.println("--------EE:"+"entriesUpdated");
22. }
24. @Override
25. public void presenceChanged(Presence arg0) {
26. // TODO Auto-generated method stub
27. System.out.println("--------EE:"+"presenceChanged");
28. }
30. });

下一篇主要是文件传输和接收