languageform.java

手机在线系统 采用Java 中的J2ME, JSP 跟MySql 运行环境是：jsdk1.4以上

/**
 * @(#)LanguageForm.java	1.11 01/08/23
 * 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.language;
 
 
import com.j2me.about.*;
import com.j2me.counter.*;	 
import com.j2me.main.*;
import javax.microedition.lcdui.*;
 /**
  *类LanguageForm是用户进行选择语言的界面并监听用户的选择
  */

 public class LanguageForm extends Form implements CommandListener, ItemStateListener
 {
	 private Display display = null;
	 private MainList mainList = null;
	 public Command okCommand = null;	//定义确定软键 
	 public Command backCommand = null;	//定义确定软键 
	 public Command cancelCommand = null;	//定义确定软键 
	 public Alert infoAlert = null;	 //初始化警告信息
	 public ChoiceGroup languageChoice = null; //定义选择框

	 private boolean isEnglish = false;
	 private boolean isChinese = false;
	 

	 public LanguageForm(String s)
	 {
		 super(s);
		 this.okCommand = new Command("确定", Command.OK, 2);	
		 this.backCommand = new Command("返回", Command.EXIT, 2);	
		 this.cancelCommand = new Command("取消", Command.EXIT, 2);
		 this.infoAlert = new Alert("信息", "是否确定你所作出的选择!",null,AlertType.INFO);	 //初始化警告信息
		 this.infoAlert.setTimeout(Alert.FOREVER);
		 this.infoAlert.addCommand(okCommand);
		 this.infoAlert.addCommand(cancelCommand);
		 this.infoAlert.setCommandListener(this);
		 this.languageChoice = new ChoiceGroup("请选择", ChoiceGroup.EXCLUSIVE); 
		 this.languageChoice.append("简体中文", null); 
		 this.languageChoice.append("English", null);
		 this.append(languageChoice);
	   	 this.addCommand(backCommand);
		 this.setCommandListener(this);
		 this.setItemStateListener(this);
		
	 }

	 public void showForm( Display display, MainList mainList)
	 {
		 this.display = display;
	   	 this.mainList = mainList;
		 this.display.setCurrent(this);
	 }

    /**
	 *实现监视器
	 */
	public void commandAction( Command c, Displayable displayable)
	{
		if (c == backCommand)
		{
			this.display.setCurrent(this.mainList);
		}

		if (c == okCommand)
		{
			if (isEnglish == true)
			{
				Language.setEnglish();
			}
			if (isChinese == true)
			{
				Language.setChinese();
			}			
			 this.display.setCurrent(mainList);		
		}

		if (c == cancelCommand)
		{
			this.display.setCurrent(this);
		}
	}

	public void itemStateChanged(Item item)	   
    {
		if(item == languageChoice)
		{            
			if(languageChoice.isSelected(0) == true)	 //判断是否对对话框做出选择
            {
				isEnglish = false;
				isChinese = true;
				this.display.setCurrent(this.infoAlert);
			}

			if (languageChoice.isSelected(1) == true)
			{
				isEnglish = true;
				isChinese = false;
			    this.display.setCurrent(this.infoAlert);				
			}
		}
	}
 }