J2ME 通讯录
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package hello;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import javax.microedition.midlet.*;
import java.util.Enumeration;
import java.util.Vector;
import java.io.*;
public class AddressBookMIDlet extends MIDlet implements CommandListener{
private Display display=null;
Command search=null;
Command quit=null;
Command delete=null;
Command addnow=null;
Command edit=null;
Command mainmenu=null;
List menu=null;
Form ui_form=null;
StringItem si=null;
TextField name=null;
TextField phone=null;
TextField nameForEdit=null;
RecordStore recordStore=null;
public AddressBookMIDlet() {
//用户界面初始化
display=Display.getDisplay(this);
quit=new Command("关闭",Command.SCREEN,3);
search=new Command("查询",Command.SCREEN,2);
delete=new Command("删除",Command.SCREEN,2);
addnow=new Command("增加",Command.SCREEN,2);
edit=new Command("修改",Command.SCREEN,2);
mainmenu=new Command("主菜单",Command.SCREEN,2);
//记录存储初始化
try{
recordStore=RecordStore.openRecordStore("addresses", true);
}catch(RecordStoreException rse){
rse.printStackTrace();
}
}
//关闭应用程序
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
menu=null;
notifyDestroyed();
}
//查询用户界面
void searchScreen(){
ui_form=new Form("电话薄查询");
name=new TextField("查询姓名","",50,0);
ui_form.append(name);
ui_form.addCommand(search);
ui_form.addCommand(quit);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//增加记录的用户界面。。。
void addScreen(){
ui_form=new Form("增加");
name=new TextField("姓名","",50,0);
ui_form.append(name);
phone=new TextField("电话号码","",50,0);
ui_form.append(phone);
ui_form.addCommand(addnow);
ui_form.addCommand(quit);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//修改记录的用户界面
void editScreen(){
ui_form=new Form("修改");
nameForEdit= new TextField("需要修改的姓名","",50,0);
ui_form.append(nameForEdit);
name=new TextField("姓名","",50,0);
ui_form.append(name);
phone=new TextField("电话号码","",50,0);
ui_form.append(phone);
ui_form.addCommand(edit);
ui_form.addCommand(quit);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//删除一条记录的用户界面
void deleteScreen(){
ui_form=new Form("删除");
name=new TextField("姓名","",50,0);
ui_form.append(name);
ui_form.addCommand(delete);
ui_form.addCommand(quit);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//重置menu
protected void pauseApp() {
menu=null;
}
// 设置菜单选项及监听
protected void startApp() throws MIDletStateChangeException {
menu=new List("电话薄...",List.IMPLICIT);
menu.append("1.查询", null);
menu.append("2.增加", null);
menu.append("3.删除", null);
menu.append("4.修改", null);
menu.append("5.关闭", null);
menu.setCommandListener(this);
display.setCurrent(menu);
}
public void commandAction(Command c, Displayable d) {
if(c==quit){//按下关闭按钮，触发相应事件处理
try{
close();//关闭记录存储
}catch(RecordStoreException rse){
rse.printStackTrace();//销毁应用程序，触发相应事件处理
}
try {
destroyApp(true);
} catch (MIDletStateChangeException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
}else if(c==search){
String temp_search=name.getString();//获取要查询的姓名
address_search(temp_search);//调用查询方法
}
else if (c==edit){
String temp_nameForEdit=nameForEdit.getString();
String temp_name=name.getString();
String temp_phone=phone.getString();//调用修改方法
address_edit(temp_nameForEdit,temp_name,temp_phone);
}
else if(c==mainmenu){
try {
startApp();
} catch (MIDletStateChangeException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}//重置
}
else if(c==delete){
String temp_delete=name.getString();//获得要删除的姓名
address_del(temp_delete);//调用删除方法
}
else if(c==addnow){
String temp_name=name.getString();//获得增加的姓名
String temp_phone=phone.getString();//获得增加的电话号码
address_add(temp_name,temp_phone);//调用增加方法
}
else{
List down=(List)display.getCurrent();
switch(down.getSelectedIndex()){
case 0: searchScreen();break;
case 1: addScreen();break;
case 2: deleteScreen();break;
case 3: editScreen();break;
case 4: try {
destroyApp(true);
} catch (MIDletStateChangeException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}break;
}
}
}
//查询方法
void address_search(String address){
String temp="";
String phone_number;
String person_name;
String check_name;
int size=address.length();
try{
RecordEnumeration re=recordStore.enumerateRecords(null, null, false);
ui_form=new Form("查询结果");
while(re.hasNextElement()){
String name1=new String(re.nextRecord());
try{
person_name=name1.substring(0,name1.indexOf("?"));
}catch(Exception ef){
person_name="请检查姓名是否正确";
ef.printStackTrace();
}
if (person_name.length()>=size){
check_name=person_name.substring(0,size);
if(check_name.equals(address)){
try{
phone_number=name1.substring(name1.indexOf("?")+1);
}catch(Exception e){
phone_number="";
}
temp=temp+"\n姓名.."+person_name+"\n电话.."+phone_number;
}
}
}
if(temp.equals(" ")){
temp="没有找到。。。。。";
}
ui_form.append(temp);
ui_form.addCommand(quit);
ui_form.addCommand(mainmenu);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}catch(RecordStoreNotOpenException rsnoe){
rsnoe.printStackTrace();
}catch(InvalidRecordIDException irid){
irid.printStackTrace();
}catch(RecordStoreException rse){
rse.printStackTrace();
}
}
//删除方法
void address_del(String address){
String temp="";
String phone_number;
String person_name;
int id;
int del_id=0;
try{
RecordEnumeration re=recordStore.enumerateRecords(null, null, false);
ui_form=new Form("删除结果");
while(re.hasNextElement()){
id=re.nextRecordId();
String name1=new String(recordStore.getRecord(id));
try{
person_name=name1.substring(0,name1.indexOf("?"));
}catch(Exception ef){
person_name="请检查姓名是否正确";
}
if(person_name.equals(address)){
del_id=id;
}
}
if(del_id !=0){
recordStore.deleteRecord(del_id);
temp="成功删除一条记录";
}else{
temp="所指定的记录不在电话薄内";
}
}catch(Exception e){
}
ui_form.append(temp);
ui_form.addCommand(quit);
ui_form.addCommand(mainmenu);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//增加方法
void address_add(String address,String phone){
String data=address+"?"+phone;
System.out.println(data);
try{
byte[] b=data.getBytes();
recordStore.addRecord(b, 0, b.length);
ui_form =new Form("添加成功");
ui_form.append("成功添加一条记录");
ui_form.addCommand(quit);
ui_form.addCommand(mainmenu);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}catch(RecordStoreException rse){
rse.printStackTrace();
}
}
//修改方法
void address_edit(String addressForEdit,String address,String phone){
int id=1;
int edit_id=0;
String person_name;
String temp="error";
try{
RecordEnumeration re=recordStore.enumerateRecords(null, null, false);
ui_form=new Form("修改");
while(re.hasNextElement()){
id=re.nextRecordId();
String name1=new String(recordStore.getRecord(id));
try{
person_name=name1.substring(0,name1.indexOf("?"));
}catch(Exception ef){
person_name="请检查姓名是否正确";
}
if(person_name.equals(addressForEdit)){
edit_id=id;
}
}
if(edit_id !=0){
String data=address+"?"+phone;
byte[] b_data=data.getBytes();
recordStore.setRecord(edit_id, b_data, 0, b_data.length);
temp="成功删除一条记录";
}else{
temp="要修改的记录不在电话薄内";
}
}catch(Exception e){
e.printStackTrace();
}
ui_form.append(temp);
ui_form.addCommand(quit);
ui_form.addCommand(mainmenu);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
//关闭存储记录
public void close()throws RecordStoreNotOpenException,RecordStoreException{
recordStore.closeRecordStore();
}
}
效果如下所示：
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