photolist.java

来自「手机在线系统 采用Java 中的J2ME, JSP 跟MySql 运行环」· Java 代码 · 共 115 行

/**
 * @(#)PhotoList.java	
 * Copyright (c) 2004-2005 wuhua of workroom Inc. All Rights Reserved.
 * @version 	1.0, 10/05/2004
 * @author 	饶荣庆
 * @author 	
 */
package com.j2me.myphoto;

import com.j2me.main.*;	
import com.j2me.language.*;
import java.util.*;
import javax.microedition.lcdui.*;

/**
 *此类的功能是用指定的方式排序用户。并把用户输出的列表上
 */
public class PhotoList extends List implements CommandListener 
{
	private Display display = null;
	private PhotoBookMenu photoBookMenu = null;
	private DetailInfoForm detailInfoForm = null;
	public Command infoCommand = null;	
	public Command backCommand = null;	
	private String aString;
	private PhotoBook pb = null;
	private Vector vectorPhotos = null;
	private Enumeration enumerationVector;
	private Photo photo;
	private int sortBy;		  //指定排序方式获得对象

	public PhotoList(String s, int _sortBy)
	{
		super(s, Choice.IMPLICIT);	
		this.sortBy = _sortBy;  //以指定方式来列表。0为相片名，1为id
		this.infoCommand = new Command("详细信息", Command.OK, 2);	
		this.backCommand = new Command("返回", Command.BACK, 2);
		this.addCommand(backCommand);
		this.addCommand(infoCommand);
		this.setCommandListener(this);
	}

	public void showForm(Display display, PhotoBookMenu photoBookMenu)	//用来显示界面
	{	
		this.initList();
		this.display = display;
	   	this.photoBookMenu = photoBookMenu;
		this.display.setCurrent(this);
	}

	public void initList()
	{
		this.pb = new PhotoBook();
		this.vectorPhotos = pb.getAllPhotos (sortBy);  //根据指定的排序方式，获得Friend对象
		if (vectorPhotos.isEmpty())
		{
			this.removeCommand(infoCommand);
		}
		else 
		{
			this.addCommand(infoCommand);
		}
		this.enumerationVector = vectorPhotos.elements();
		this.pb.closeRS();
		while (enumerationVector.hasMoreElements())	    //把存储的对象一个个读出来并显示在列表上
		{
			photo = (Photo)enumerationVector.nextElement();
			if (photo.getID()<10)
			{
				this.append("00" + photo.getID() + " | " + photo.getName() + " | " + "/myphoto/" + photo.getPath() + ".png", null);
			}
			else if (photo.getID()<100)
			{
				this.append("0" + photo.getID() + " | " + photo.getName() + " | " + "/myphoto/" + photo.getPath() + ".png", null);
			}
			else
			{
				this.append(photo.getID() + " | " + photo.getName() + " | " + "/myphoto/" + photo.getPath() + ".png", null);
			}
		}
	}

	public void commandAction(Command c,Displayable s)
	{
		if(c == backCommand)
		{
			this.display.setCurrent(photoBookMenu);
		}

		if (c == infoCommand)
		{
			if (Language.isEnglish == true)  //修改语言为英文
			{				
				this.detailInfoForm = new DetailInfoForm("Detail Info");
				this.detailInfoForm.idItem.setLabel("ID:");
				this.detailInfoForm.nameItem.setLabel("Name:");
				this.detailInfoForm.pathItem.setLabel("Path:");		
				this.detailInfoForm.showForm(display, this, photoBookMenu, null, this.getString(this.getSelectedIndex()));
			}
			else										
			{
				this.detailInfoForm = new DetailInfoForm("详细信息");
				this.detailInfoForm.idItem.setLabel("ID:");
				this.detailInfoForm.nameItem.setLabel("图片名:");
				this.detailInfoForm.pathItem.setLabel("路径:");
				this.detailInfoForm.showForm(display, this, photoBookMenu, null, this.getString(this.getSelectedIndex()));
			}			
		}
	}
}