J2ME实验复习指导.docVIP

J2ME 实验复习 J2ME高级界面开发技术和高级事件处理机制编写实现模拟手机发短信实例。 package com.software.shortmsg; import java.io.IOException; import javax.microedition.lcdui.Command; import javax.microedition.lcdui.CommandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.lcdui.Image; import javax.microedition.lcdui.ImageItem; import javax.microedition.lcdui.Item; import javax.microedition.lcdui.ItemStateListener; import javax.microedition.lcdui.TextField; import javax.microedition.midlet.MIDlet; import javax.microedition.midlet.MIDletStateChangeException; public class ShortMessageMIDlet extends MIDlet implements CommandListener, ItemStateListener { private Display display; private Form welForm; private Form editForm; private TextField editTxtField; private Form telForm; private TextField telNumTxtField; private Command writeCmd; private Command exitCmd; private Command deleteCmd; private Command backCmd; private Command sendCmd; private Command OKCmd; public ShortMessageMIDlet() { display = Display.getDisplay(this);//获取手机屏幕 // 欢迎界面 welForm = new Form(欢迎界面); writeCmd = new Command(写短信, Command.SCREEN, 1); exitCmd = new Command(退出, Command.EXIT, 1); // 编辑界面 editForm = new Form(编辑界面); editTxtField = new TextField(短信内容：, , 255, TextField.ANY); deleteCmd = new Command(删除, Command.CANCEL, 1); backCmd = new Command(返回, Command.BACK, 1); sendCmd = new Command(发送, Command.SCREEN, 1); // 发送界面 telForm = new Form(发送界面); telNumTxtField = new TextField(对方号码：, , 16, TextField.NUMERIC); OKCmd = new Command(确定, Command.OK, 1); } protected void startApp() throws MIDletStateChangeException { display.setCurrent(welForm); // 欢迎界面 welForm.append(欢迎您使用自己开发的短信发送系统！\n); try { Image img = Image.createImage(/logo.png); ImageItem imgItem = new ImageItem(, img, ImageItem.LAYOUT_CENTER, 图片不能显示); welForm.append(imgItem); } catch (IOException e) {