tesmo.java

在JAVA平台下开发GPRS通信模块,发送SMS和GPRS信息

/*
 * @(#)SocketMIDlet.java	1.7 04/01/27
 *
 * Copyright (c) 2005 Kuka Microsystems, Inc. All rights reserved. 
 * PROPRIETARY/CONFIDENTIAL
 * Use is subject to license terms
 */
package socket;

import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.wireless.messaging.*;
import java.io.*;

public class Tesmo extends MIDlet implements CommandListener {

    public String clientNum;
    public String serverIP;//="localhost";
    public int incomingPortNum = 5000; // Port to listen for connection
    
    private static Display display;
    private Form f;
    private ChoiceGroup cg;
    private TextField cnum;
    private StringItem messageString;
    private boolean isPaused;
    private Server server;
    private Client client;
    private boolean isUser;
    private boolean srv;
    
		private MessageConnection incomingConnection = null; // Connection for receiving the message
		private Message incomingMessage; // Incoming message
	  
	  private Command exitCommand = new Command("Exit", Command.EXIT, 1);
    private Command startCommand = new Command("Start", Command.ITEM, 1);
    private Command sendCommand = new Command("Send", Command.ITEM, 1);

    public Tesmo() {
    	
    		// Was the MIDlet started by an incoming connection?
    		String connectList[];
				connectList = PushRegistry.listConnections(true);
				if (connectList == null || connectList.length == 0){
						// Started by the user
						isUser = true;
				}else{
						// Started by message
						try
						{
								incomingConnection = (MessageConnection) Connector.open("sms://:" + incomingPortNum);
								// Receive the message
								incomingMessage = incomingConnection.receive();
						}catch(IOException e){
								System.out.println("IO Exception!"+e);
						}
        		isUser = false;
      	}
				
				// Start part of MIDlet depending on opener
				if(isUser==true){
        		display = Display.getDisplay(this);
        		f = new Form("Tesmo");
        		cnum = new TextField("Enter client number:", null, 120, 0x0);
        		f.append(cnum);

        		f.addCommand(exitCommand);
        		f.addCommand(startCommand);
        		f.setCommandListener(this);

						srv = true;
        		display.setCurrent(f);
        }else if(isUser==false){
        		String inc = incomingMessage.getAddress();
        		serverIP = ((TextMessage)incomingMessage).getPayloadText();
        		inc = inc.substring(6);
        		display = Display.getDisplay(this);
        		f = new Form("Tesmo");
        		messageString = new StringItem("Incoming connection from "+inc+"!", "\nPress \"Start\" to connect.\nOr \"Exit\" to quit.");
        		f.append(messageString);

        		f.addCommand(exitCommand);
        		f.addCommand(startCommand);
        		f.setCommandListener(this);

						srv = false;
        		display.setCurrent(f);
      	}
        
    }

    public boolean isPaused() {
        return isPaused;
    }

    public void startApp() {
    		isPaused = false;
    }


    public void pauseApp() {
        isPaused = true;
    }

    public void destroyApp(boolean unconditional) {
        if (server != null) {
            server.stop();
        }
        if (client != null) {
            client.stop();
        }   
    }

    public void commandAction(Command c, Displayable s) {
        if (c == exitCommand) {
            destroyApp(true);
            notifyDestroyed();
        } else if (c == startCommand) {
            if (srv == true) {
            		clientNum = cnum.getString();
            		if (!isValidPhoneNumber(clientNum)) { 
            				cnum.setString("Wrong number!");
            		}else{
                		server = new Server(this);
                		server.start();
                }
            } else {
                client = new Client(this);
                client.start();
            }
        }
    }
		
		private static boolean isValidPhoneNumber(String number) {
        char[] chars = number.toCharArray();
        if (chars.length == 0) {
            return false;
        }
        int startPos = 0;
        // initial '+' is OK
        if (chars[0] == '+') {
            startPos = 1;
        }
        for (int i = startPos; i < chars.length; ++i) {
            if (!Character.isDigit(chars[i])) {
                return false;
            }
        }
        return true;
    } 
}