XMPP——Smack[4]状态，心情，头像更改 （转） CVT

转自：http://blog.csdn.net/wklken/article/details/6460117

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

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);

    }

1. 心情修改

  

/**
     * 修改心情
     * @param connection
     * @param status
     */
    public static void changeStateMessage(XMPPConnection connection,String status)
    {
        Presence presence = new Presence(Presence.Type.available);
        presence.setStatus(status);
        connection.sendPacket(presence);

    }

1. 修改用户头像

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();
            }
        }
}

1. 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

final Roster roster = Client.getRoster();

        roster.addRosterListener(
                new RosterListener() {

                    @Override
                    public void entriesAdded(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        System.out.println("--------EE:"+"entriesAdded");
                    }

                    @Override
                    public void entriesDeleted(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        System.out.println("--------EE:"+"entriesDeleted");
                    }

                    @Override
                    public void entriesUpdated(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        System.out.println("--------EE:"+"entriesUpdated");
                    }

                    @Override
                    public void presenceChanged(Presence arg0) {
                        // TODO Auto-generated method stub
                        System.out.println("--------EE:"+"presenceChanged");
                    }

                });

下一篇主要是文件传输和接收