Java移动通信程序设计-J2ME MIDP

import java.io.*; import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class MIDPApplication extends MIDlet implements CommandListener{ Ticker newsTicker; private List menuList; //主菜单 private List luckyList; //一周运势菜单 private List commList; //通讯簿菜单 private Command exitCommand; //离开 private Command execCommand; //执行 private Command menuCommand; //主目录 private Command commCommand; //通讯簿 private Command luckyCommand; //一周运势 private Command saveCommand; //存储 Form queryForm = null; Form modificationForm = null; Form deleteForm = null; TextField nameField; TextField EMailField; TextField ageField; String[] menuItem ={"通讯簿","一周运势"}; String[] commItem ={"新增","查询","修改","删除"}; String[] luckyItem ={"金牛座","处女座","摩羯座", "射手座","牡羊座","狮子座", "双鱼座","巨蟹座","天蝎座", "双子座","天秤座","水瓶座" }; Image[] menuImage = {createImage("/Sokoban.png"), createImage("/Tiles.png") }; //The display for this MIDlet private Display display; private String currentScreen = ""; public static String criteria = ""; private int deleteID = 0; private int modificationID = 0; public MIDPApplication() { display = Display.getDisplay(this); newsTicker = new Ticker("Java J2MIDP一书已出版 北京申奥成功"); exitCommand = new Command("离开", Command.EXIT, 1); execCommand = new Command("执行",Command.OK, 1); menuCommand = new Command("主目录",Command.SCREEN, 1); commCommand = new Command("通讯簿",Command.SCREEN, 1); luckyCommand = new Command("运势",Command.SCREEN,1); } public void startApp() { menuList = new List(null,List.IMPLICIT,menuItem,menuImage); menuList.setTicker(newsTicker); menuList.addCommand(exitCommand); menuList.setCommandListener(this); display.setCurrent(menuList); currentScreen="主目录"; } public void pauseApp() { } public void destroyApp(boolean unconditional) { } public void commandAction(Command c, Displayable s) { if (c == exitCommand) { destroyApp(false); notifyDestroyed(); } if(c==List.SELECT_COMMAND){ if(currentScreen=="主目录"){ int itemIndex = menuList.getSelectedIndex(); switch(itemIndex){ case 0: { doCommunication(); break; } case 1: doLucky(); } } else if(currentScreen=="通讯簿"){ int itemIndex = commList.getSelectedIndex(); switch(itemIndex){ case 0:{ doAppend(); break; } case 1:{ doQuery(); break; } case 2:{ doModification(); break; } case 3:{ doDelete(); break; } } } else{ } } if(c==menuCommand){ display.setCurrent(menuList); currentScreen="主目录"; } if(c==commCommand){ doCommunication(); } if(c==luckyCommand){ doLucky(); } if(c==menuCommand){ doMenu(); } if(c==execCommand){ if(currentScreen=="一周运势"){ showLucky(); } if(currentScreen=="通讯簿查询"){ this.criteria = nameField.getString(); doQueryPerson(); queryForm = null; } if(currentScreen=="通讯簿删除"){ doQueryPerson(); doDeletePerson(this.deleteID); } if(currentScreen=="通讯簿修改"){ modificationID = 0; doQueryPerson(); if(!nameField.getString().equals("无此数据!")){ System.out.println("i am here"+ ":" + modificationID); EMailField = new TextField("E Mail",null,30,TextField.EMAILADDR); ageField = new TextField("年龄",null,3,TextField.NUMERIC); saveCommand = new Command("存储",Command.SCREEN,1); modificationForm.addCommand(saveCommand); modificationForm.removeCommand(execCommand); modificationForm.append(EMailField); modificationForm.append(ageField); } else{ } } } //------存储通讯簿的数据 if(c==saveCommand) doSave(); } private Image createImage(String name){ Image aImage = null; try{ aImage = Image.createImage(name); } catch(IOException e){ } return aImage; } private void doMenu(){ currentScreen="主目录"; display.setCurrent(menuList); } private void doCommunication(){ Image[] commIcon = {createImage("/StarCruiser.png"), createImage("/Stock.png"), createImage("/ManyBalls.png"), createImage("/Tiles.png") }; commList = new List("通讯簿",List.IMPLICIT,commItem,commIcon); commList.addCommand(luckyCommand); commList.addCommand(menuCommand); commList.setCommandListener(this); currentScreen="通讯簿"; display.setCurrent(commList); } private void doLucky(){ luckyList = new List("一周运势",List.EXCLUSIVE,luckyItem,null); luckyList.addCommand(commCommand); luckyList.addCommand(menuCommand); luckyList.addCommand(execCommand); luckyList.setCommandListener(this); currentScreen="一周运势"; display.setCurrent(luckyList); } private void showLucky(){ int selectedItem = luckyList.getSelectedIndex(); Alert alert; String information=""; switch(selectedItem){ case 0:{ information = "金牛座"; break; } case 1:{ information = "处女座"; break; } case 2:{ information = "摩羯座"; break; } case 3:{ information = "射手座"; break; } case 4:{ information = "牡羊座"; break; } case 5:{ information = "狮子座"; break; } case 6:{ information = "双鱼座"; break; } case 7:{ information = "巨蟹座"; break; } case 8:{ information = "天蝎座"; break; } case 9:{ information = "双子座"; break; } case 10:{ information = "天秤座"; break; } case 11:{ information = "水瓶座"; break; } } alert = new Alert("资讯",information,null,AlertType.INFO); alert.setTimeout(Alert.FOREVER); display.setCurrent(alert); } private void doAppend(){ Form appendForm = new Form("新增"); nameField = new TextField("姓名",null,8,TextField.ANY); EMailField = new TextField("E Mail",null,30,TextField.EMAILADDR); ageField = new TextField("年龄",null,3,TextField.NUMERIC); saveCommand = new Command("存储",Command.SCREEN,1); appendForm.append(nameField); appendForm.append(EMailField); appendForm.append(ageField); appendForm.addCommand(saveCommand); appendForm.addCommand(commCommand); appendForm.addCommand(luckyCommand); appendForm.addCommand(menuCommand); appendForm.setCommandListener(this); currentScreen = "通讯簿新增"; display.setCurrent(appendForm); } private void doModification(){ modificationForm = new Form("修改"); nameField = new TextField("姓名",null,10,TextField.ANY); modificationForm.append(nameField); modificationForm.addCommand(execCommand); modificationForm.addCommand(commCommand); modificationForm.addCommand(luckyCommand); modificationForm.addCommand(menuCommand); modificationForm.setCommandListener(this); currentScreen = "通讯簿修改"; display.setCurrent(modificationForm); } private void doQuery(){ queryForm = new Form("查询"); nameField = new TextField("姓名",null,10,TextField.ANY); queryForm.append(nameField); queryForm.addCommand(execCommand); queryForm.addCommand(commCommand); queryForm.addCommand(luckyCommand);