Sorry, but the emulator currently doesn't support multicast :-(
On Wed, Apr 8, 2009 at 1:57 AM, Thiago B. <[email protected]> wrote:
>
> Hi, I'm trying to develop an application that need to send UDP
> Multicast packets to the local network.
> There is a few equipments that respond to this packets and send back
> some informations.
> I'm not worried with the server right now, because there is a server
> on the same network that collect all this multicast data.
> I just want to make my mobile able to send the request message to
> start the process.
>
> My client class is called MCastClient, see below:
> import java.net.DatagramPacket;
> import java.net.InetAddress;
> import java.net.MulticastSocket;
>
> public class MCastClient {
> private int port = 50000;
> private String addr = "239.192.1.100";
> private MulticastSocket sock = null;
>
> public void sendData(String data) {
> try {
> InetAddress group = InetAddress.getByName(addr);
>
> sock = new MulticastSocket(port);
>
> sock.joinGroup(group);
>
> DatagramPacket dataPckt = new
> DatagramPacket(data.getBytes(),
> data.length(), group, port);
>
> sock.send(dataPckt);
> sock.leaveGroup(group);
> sock.close();
> } catch (Exception e) {}
> }
> }
>
> It runs perfectly on my computer as a Java Application.
>
> On the Android Emulator i create a simple application with a button
> and add a OnClickListener.
>
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> final MCastClient mcClient = new MCastClient();
> Button btn = (Button)findViewById(R.id.btn_send);
>
> btn.setOnClickListener(new OnClickListener() {
> @Override
> public void onClick(View v) {
> mcClient.sendData("001RequestData");
> }
> });
>
> I believe that my packet is not arriving on the local network.
> I already did some test with the command "redir add udp:50000:50000"
> on telnet port of the emulator, that i got from
>
> http://developer.android.com/guide/developing/tools/emulator.html#connecting
> .
>
> There is any other command that can forward ports to the emulator?
> I'm almost putting a port sniffer on my machine just to check what is
> happening.
>
> Thanks for the help, it will be very appreciated.
> Thiago B.
>
>
> >
>
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