showlistui.java

用J2ME写的一个移动校园管理软件。我是看这个学习J2ME的。现在看来写得不是很好。

/*
 * BookList.java
 *
 * Created on 2006年8月24日, 下午10:49
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package cn.edu.nwpu.MobileCampusClinet;

import cn.edu.nwpu.MobileCampusServer.*;
import javax.microedition.lcdui.*;
import java.util.Vector;
import javax.microedition.midlet.MIDlet;


/**
 *
 * @author NickJava
 */
public class ShowListUI extends List implements CommandListener{
    private Form ShowElement;
    private Display display;
    private Displayable displayable;
    private Command OKCommand;
    private Command backCommand;
    private MIDlet midlet;
    private StringItem stringItem;
    private SearchFormUI searchFrom;
    private Vector showArray;
    private int flag;
    /** Creates a new instance of BookList */
    public ShowListUI(String title,MIDlet midlet,Displayable displayable,Vector showArray,int flag) {
        super(title, Choice.IMPLICIT);
        ShowElement=new Form(null);
        OKCommand = new Command("确定", Command.OK , 5);
        backCommand = new Command("返回",Command.BACK,5);
        this.showArray=showArray;
        this.midlet=midlet;
        this.display=Display.getDisplay(midlet);
        this.displayable=displayable;
        this.flag=flag;
        appendElement(flag);
        addCommand(OKCommand);
        addCommand(backCommand);
        setCommandListener(this);
    }
    //向列表屏添加单词和图书名
    public void appendElement(int conts){
        switch(conts){
            case 0 :
                for(int i=0 ; i<showArray.size();i++){
                    DictionaryBean show_Word=(DictionaryBean)showArray.elementAt(i);
                    append(show_Word.getWord(),null);
                }
                searchFrom=new SearchFormUI("英汉查询","请输入要查询的单词",midlet ,displayable,0);
                break;
            case 1:
                for(int i=0 ; i<showArray.size();i++){
                    BookBean book_Name=(BookBean)showArray.elementAt(i);
                    append(book_Name.getBookname(),null);
                }
                searchFrom=new SearchFormUI("图书查询系统","简单查询",midlet ,displayable,1);
                break;
        }
    }
    //查看具体的单词或图书的详细情况
    public void getElementForm(int cont){
        int num=this.getSelectedIndex();
        switch(cont){
            case 0 :
                DictionaryBean word=(DictionaryBean)showArray.elementAt(num);
                stringItem= new StringItem(word.getWord(), " \r\n单词意思 :\r\n"+word.getMeaning()
                +" \r\n音标 :"+word.getPronunciation());
                break;
            case 1 :
                ShowElement.deleteAll();
                BookBean book=(BookBean)showArray.elementAt(num);
                stringItem= new StringItem(book.getBookname(), " \r\n索取号 :"+book.getIndexid()
                +" \r\n出版社 :"+book.getPublisher()
                +" \r\n藏书地点 :"+book.getDepository()
                +" \r\n借阅状态 :"+book.getState()
                +" \r\n还书日期 :"+book.getReturndate());
                break;
        }
        ShowElement.append(stringItem);
        ShowElement.addCommand(backCommand);
        ShowElement.setCommandListener(this);
    }
    public void commandAction(Command c,Displayable d){
        if(c==OKCommand){
            getElementForm(flag);
            display.setCurrent(ShowElement);
        }
        if(c==backCommand){
            display.setCurrent(searchFrom);
        }
        if(d.equals(ShowElement)){
            if(c==backCommand){
                display.setCurrent(this);
            }
        }
    }
    
}