datefielddemo.java

j2me手机应用开发环境下的UI程序

/*
 *
 * Copyright © 2007 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 */
package datefield;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;


/**
 * The date field demo simply shows a date component on the screen with 3
 * settings (Date, Time, Date & Time).
 *
 * @version 2.0
 */
public class DateFieldDemo extends MIDlet implements CommandListener {
    private static final Command CMD_EXIT = new Command("Exit", Command.EXIT, 1);
    private boolean firstTime;
    private Form mainForm;

    public DateFieldDemo() {
        firstTime = true;
        mainForm = new Form("Alert Options");
    }

    protected void startApp() {
        if (firstTime) {
            mainForm.append(new DateField("Date", DateField.DATE));
            mainForm.append(new DateField("Time", DateField.TIME));
            mainForm.append(new DateField("Date & Time", DateField.DATE_TIME));
            mainForm.addCommand(CMD_EXIT);
            mainForm.setCommandListener(this);
            firstTime = false;
        }

        Display.getDisplay(this).setCurrent(mainForm);
    }

    protected void destroyApp(boolean unconditional) {
    }

    protected void pauseApp() {
    }

    public void commandAction(Command c, Displayable d) {
        if (c == CMD_EXIT) {
            destroyApp(false);
            notifyDestroyed();
        }
    }
}