queryform.java

j2me实例代码

package httpsample;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.io.*;
import java.io.*;
import javax.microedition.lcdui.*;

public class QueryForm extends TextBox implements CommandListener {

	MIDlet midlet;
	public QueryForm(MIDlet m) {
		super("please enter:","http://www.google.com",40,TextField.ANY);
		midlet=m;
		addCommand(new Command("leave",Command.SCREEN,1));
		addCommand(new Command("query",Command.SCREEN,1));
		setCommandListener(this);
	}

	protected void startApp() throws MIDletStateChangeException {
	

	}

	protected void pauseApp() {


	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		

	}

	public void commandAction(Command c, Displayable d) {
		String cmd=c.getLabel();
		if(cmd.equals("leave")){
			midlet.notifyDestroyed();
		}else if(cmd.equals("query")){
			String url=getString();
			WorkThread wt=new WorkThread(url,Display.getDisplay(midlet));
			wt.start();
		}

	}

}