XMPP——Smack[4]状态，心情，头像更改

呵呵，三天时间，看的不是很深入，欢迎大家补充呀

包括上线，隐身，对某人隐身，对某人上线

public static void updateStateToAvailable(XMPPConnection connection)
{
Presence presence = new Presence(Presence.Type.available);
connection.sendPacket(presence);
}
public static void updateStateToUnAvailable(XMPPConnection connection)
{
Presence presence = new Presence(Presence.Type.unavailable);
connection.sendPacket(presence);
}
public static void updateStateToUnAvailableToSomeone(XMPPConnection connection,String userName)
{
Presence presence = new Presence(Presence.Type.unavailable);
presence.setTo(userName);
connection.sendPacket(presence);
}
public static void updateStateToAvailableToSomeone(XMPPConnection connection,String userName)
{
Presence presence = new Presence(Presence.Type.available);
presence.setTo(userName);
connection.sendPacket(presence);
}

有点麻烦，主要是读入图片文件，编码，传输之

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());
Image image = ImageIO.read(bais);
ImageIcon ic = new ImageIcon(image);
vcard.save(connection);
}
private static byte[] getFileBytes(File file) throws IOException {
BufferedInputStream bis = null;
try {
bis = new BufferedInputStream(new FileInputStream(file));
int bytes = (int) file.length();
byte[] buffer = new byte[bytes];
int readBytes = bis.read(buffer);
if (readBytes != buffer.length) {
throw new IOException("Entire file not read");
}
return buffer;
} finally {
if (bis != null) {
bis.close();
}
}
}

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