[kabrator]

Hi!
I'm new in this forum and i new too programming in BB. I have a question about UDP. I search about UDP connection here and i find this:

PHP Code:


/*
 * RIMJUDPClient.java
 *
 * © <your company here>, 2003-2007
 * Confidential and proprietary.
 */

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.io.*;
import net.rim.device.api.system.*;
import net.rim.device.api.util.*;
import javax.microedition.io.*;
import java.util.*; 
import java.io.*;

class RIMJUDPClient extends UiApplication 
{
    static PersistentObject store;
    static 
    {
        store = PersistentStore.getPersistentObject( 0xb309d389c6a2436dL );
    }
    
    public RIMJUDPClient() 
    {
        pushScreen(new RimUDPClient());
    }
    
    public static void main(String argsxxx91;xxx93;)
    {
        RIMJUDPClient rimJApp = new RIMJUDPClient();
        rimJApp.enterEventDispatcher();
    }
    
    public class RimUDPClient extends MainScreen 
    {
        private LabelField title;
        private EditField editProtocol; 
        private EditField editMessage;
        private RichTextField editMsg;
        public String sProtocol;
        public String sMessage;
        public String sReceivedMessage;
        private sendThread sTh;
        private String mm ="Test Message";
        public Vector sVector;
        
        public RimUDPClient() 
        {
            super();
            sVector = new Vector(10);
            title = new LabelField("UDP CLient",LabelField.USE_ALL_WIDTH);
            setTitle(title);
            // udp://10.1.0.122:5029;19780/rim.net.gprs
            // udp://127.0.0.1:5029;19780/rim.net.gprs : Use This String for Local Testing
            // udp://&lt;Public IP>:&lt;UDP Port>;19780/proxy : Use This String With AT&amp;T GPRS Service
            // udp://&lt;Public IP>:&lt;UDP Port>;19780/internet3.voicestream.com : Use This String With T-Mobile GPRS Service
            editProtocol = new EditField("Protocol :","udp://10.1.0.122:5029;19780/rim.net.gprs");
            editMessage = new EditField("Message : ",mm);
            editMsg = new RichTextField("Message");
            add(editProtocol);
            add(editMessage);
            add(editMsg);
        }
        
        public void storeMessage(String sMsg) 
        {
            try 
            {
                sVector.addElement(sMsg);
                System.out.println("Vector Size :" + sVector.size());
                synchronized(store) 
                {
                    store.setContents(sVector);
                    store.commit(); 
                }
            }
            catch (Exception ex) 
            {
                System.err.println("Error while Storing" + ex);
            }
        }
        
        private MenuItem _sendItem = new MenuItem("Send Package",110,10) 
        {
            public void run()
            {
                sProtocol = editProtocol.getText().trim();
                sTh = new sendThread();
                sTh.start();
            }
        };
        
        private MenuItem _onCloseItem = new MenuItem("Close",200000,10) 
        {
            public void run() 
            {
                onCLose();
            }
        };
        
        protected void makeMenu(Menu menu,int instance)
        {
            menu.add(_sendItem);
            menu.add(_onCloseItem);
        }
        
        public boolean onCLose()
        {
            Dialog.alert("Good Bye");
            Dialog.alert("Msg: " + sReceivedMessage);
            System.exit(0);
            return true;
        }
        
        protected void disPlayMessage(final String str)
        {
            Application.getApplication().invokeLater(new Runnable() 
            {
                public void run() 
                {
                    Dialog.alert("Msg Recvd. : " + str.trim());
                    editMsg.setText(str.trim());
                }
            });
        }
        
        private class sendThread extends Thread 
        {
            DatagramConnection conn = null; 
            
            public void run() 
            {
                try 
                {
                    String msg = editMessage.getText();
                    int length = msg.length();
                    bytexxx91;xxx93; message = new bytexxx91;lengthxxx93;;
                    System.arraycopy(msg.getBytes(), 0, message, 0, length); 
                    conn = (DatagramConnection)Connector.open((editProtocol.getText()).trim());
                    Datagram outDatagram = conn.newDatagram(message, message.length);
                    conn.send(outDatagram);
                    int i= 0;
                    
                    while(true) 
                    {
                        Datagram inDatagram = conn.newDatagram(conn.getMaximumLength()); 
                        conn.receive(inDatagram); 
                        bytexxx91;xxx93; data = inDatagram.getData();
                        String retval = new String(data, 0, inDatagram.getLength()); 
                        disPlayMessage(retval);
                        storeMessage(retval);
                        System.out.println(inDatagram.getAddress() + " at port says " + i +" : " + sReceivedMessage );
                        i++;
                    }
                }
                catch (Exception e) 
                {
                    disPlayMessage("Error:" + e.toString());
                    return;
                }
                finally 
                {
                    // if (conn != null) conn.close();
                }
            } // Send Thread Run Method End Here
            
        } // Send Thread Class Ends Here
        
    }
} // Main Class RIMJavaUDP Client Ends Here 


this code was written by Dev2100.
when i run the program in the simulator, it no return nothing. is an error of the code?

another thing...
i want to send by UDP a location, i have de program tha search the location, how can implement this code in my program???

thanks a lot ;)

[kabrator]

can someone helpme, please???

[dohboy]

UDP is stateless, meaning, you will not see a response to a message sent. You should be able to set up a simple UDP server locally to test your UDP messaging. Using the device simulator, load the jar and set the protocol to udp://localhost:1234, then send your package.

//UDPServer.java

import java.net.*;
import java.io.*;


class UDPServer
{
    public static void main(String args[]) throws Exception
    {
        byte[] receive_data = new byte[1024];
        byte[] send_data = new byte[1024];

        int recv_port;
        DatagramSocket server_socket = new DatagramSocket(1234);

        while(true)
        {
            DatagramPacket receive_packet = new DatagramPacket(receive_data,
                                             receive_data.length);
            server_socket.receive(receive_packet);
            String data = new String(receive_packet.getData(),0                                          ,0
                                           ,receive_packet.getLength());

            //InetAddress IPAddress = receive_packet.getAddress();
            //recv_port = receive_packet.getPort();

            if (data.equals("q") || data.equals("Q"))
                break;
            else
                System.out.print(data);
         }
    }
}

It's been over 6 months, but I hope this helps.