Problema XMPP chat application

1public class XMPPClient implements MessageListener
2{
3 XMPPConnection connection;
4 String host, service, username, password;
5 Integer port ;
6
7 Context context;
8
9 public XMPPClient(Context ctx)
10 {
11 this.host = ctx.getString(R.string.xmpp_host);
12 this.port = Integer.parseInt((ctx.getString(R.string.xmpp_port)));
13 this.service = ctx.getString(R.string.xmpp_host);
14 this.context = ctx;
15 }
16
17 public XMPPClient(String host, Integer port, String service)
18 {
19 this.host = host;
20 this.port = port;
21 this.service = service;
22 //this.context = ctx;
23 }
24
25 public void connect() throws XMPPException
26 {
27 //XMPPConnection.DEBUG_ENABLED = true;
28 ConnectionConfiguration config = new ConnectionConfiguration(host, port);
29 connection = new XMPPConnection(config);
30 connection.connect();
31 }
32
33 public void login(String username, String password) throws XMPPException
34 {
35 connection.login(username, password);
36 Presence presence = new Presence(Presence.Type.available);
37 connection.sendPacket(presence);
38 }
39
40 public void sendMessage(String message, String to) throws XMPPException
41 {
42 Chat chat = connection.getChatManager().createChat(to, this);
43 chat.sendMessage(message);
44 }
45
46 public void disconnect()
47 {
48 connection.disconnect();
49 }
50}