XMPP——Smack[4]状态，心情，头像更改

最新推荐文章于 2015-01-05 15:09:24 发布

转载最新推荐文章于 2015-01-05 15:09:24 发布 · 1.2k 阅读

文章标签：

#IM #XMPP #Smack

Xmpp 同时被 3 个专栏收录

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本文介绍了一个即时通讯(IM)系统的实现细节，包括用户状态修改、心情设置、头像更改等功能，并提供了具体的Java代码示例。此外，还介绍了如何监听用户状态的变化。

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 plain copy print ?

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);
}

2. 心情修改

[java] view plain copy print ?

/**
* 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);
}

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 plain copy print ?

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();
}
}
}

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();            }        }}

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 plain copy print ?