stockquotedemo.java

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

import org.ksoap.*;
import org.ksoap.transport.*;

public class StockQuoteDemo extends MIDlet implements CommandListener 
{
	Form mainForm = new Form ("StockQuotes");
	TextField symbolField = 
		new TextField ("Symbol", "IBM", 5, TextField.ANY);
	StringItem resultItem = 
		new StringItem ("", "");
	Command getCommand = 
		new Command ("Get", Command.SCREEN, 1);
	
	public StockQuoteDemo () {
		mainForm.append (symbolField);
		mainForm.append (resultItem);
		mainForm.addCommand (getCommand);
		mainForm.setCommandListener (this);
	}
	
	public void startApp () {
		Display.getDisplay (this).setCurrent (mainForm);
		commandAction( null,null); //先调用一次
	}

	public void pauseApp () {
	}

	public void destroyApp (boolean unconditional) {
	}  

	public void commandAction (Command c, Displayable d) {
		try {
			String symbol = symbolField.getString ();
			resultItem.setLabel (symbol);

			SoapObject rpc = new SoapObject 
			("urn:xmethods-delayed-quotes", "getQuote");

			rpc.addProperty ("symbol", symbol);

			resultItem.setText (""+new HttpTransport 
			("http://services.xmethods.net/soap",
			 "urn:xmethods-delayed-quotes#getQuote").call (rpc));
		}
		catch (Exception e) {
			e.printStackTrace ();
			resultItem.setLabel ("Error:");
			resultItem.setText (e.toString ());
		}
	}

}