创建自定义数据包扩展类
public class ReadReceipt implements PacketExtension
{
public static final String NAMESPACE = "urn:xmpp:read";
public static final String ELEMENT = "read";
private String id;
public ReadReceipt(String id)
{
this.id = id;
}
public String getId()
{
return id;
}
@Override
public String getElementName()
{
return ELEMENT;
}
@Override
public String getNamespace()
{
return NAMESPACE;
}
@Override
public String toXML()
{
return "<read xmlns='" + NAMESPACE + "' id='" + id + "'/>";
}
public static class Provider extends EmbeddedExtensionProvider
{
@Override
protected PacketExtension createReturnExtension(String currentElement, String currentNamespace,
Map<String, String> attributeMap, List<? extends PacketExtension> content)
{
return new ReadReceipt(attributeMap.get("id"));
}
}
}
当进入聊天列表时,发送与该数据包ID相同的消息标签,如下所示。
Message message = new Message(userJid);
ReadReceipt read = new ReadReceipt(messagePacketID);
message.addExtension(read);
mConnection.sendPacket(sendReadStatus);
mConnection是xmmppConnection对象
向消息对象添加数据包扩展
在连接到服务器之前,将此扩展提供程序添加到ProviderManager中
ProviderManager.getInstance().addExtensionProvider(ReadReceipt.ELEMENT, ReadReceipt.NAMESPACE, new ReadReceipt.Provider());
创建packetListener类以接收接收者的阅读回执。
public class ReadReceiptManager implements PacketListener
{
private static Map<Connection, ReadReceiptManager> instances = Collections.synchronizedMap(new WeakHashMap<Connection, ReadReceiptManager>());
static
{
Connection.addConnectionCreationListener(new ConnectionCreationListener()
{
public void connectionCreated(Connection connection)
{
getInstanceFor(connection);
}
});
}
private Set<ReceiptReceivedListener> receiptReceivedListeners = Collections.synchronizedSet(new HashSet<ReceiptReceivedListener>());
private ReadReceiptManager(Connection connection)
{
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
sdm.addFeature(ReadReceipt.NAMESPACE);
instances.put(connection, this);
connection.addPacketListener(this, new PacketExtensionFilter(ReadReceipt.NAMESPACE));
}
public static synchronized ReadReceiptManager getInstanceFor(Connection connection)
{
ReadReceiptManager receiptManager = instances.get(connection);
if (receiptManager == null)
{
receiptManager = new ReadReceiptManager(connection);
}
return receiptManager;
}
@Override
public void processPacket(Packet packet)
{
ReadReceipt dr = (ReadReceipt)packet.getExtension(ReadReceipt.ELEMENT, ReadReceipt.NAMESPACE);
if (dr != null)
{
for (ReceiptReceivedListener l : receiptReceivedListeners)
{
l.onReceiptReceived(packet.getFrom(), packet.getTo(), dr.getId());
}
}
}
public void addReadReceivedListener(ReceiptReceivedListener listener) {
receiptReceivedListeners.add(listener);
}
public void removeRemoveReceivedListener(ReceiptReceivedListener listener) {
receiptReceivedListeners.remove(listener);
}
}
最后,将监听器添加到您的XMPP连接对象中,它会成功运行。
ReadReceiptReceivedListener readListener = new ReadReceiptReceivedListener()
{
@Override
public void onReceiptReceived(String fromJid, String toJid, String packetId)
{
Log.i("Read", "Message Read Successfully");
}
};
ReadReceiptManager.getInstanceFor(connection).addReadReceivedListener(readListener);