delwordscreen.java

一個手機程序(電子詞典),一個不可多得的源碼程序,是學習J2ME的好東東.

package org.zblog.zenghelper.screen.sub;

import javax.microedition.lcdui.Form;
import org.zblog.zenghelper.screen.SearchScreen;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import org.zblog.zenghelper.util.Navigator;
import org.zblog.zenghelper.dbtool.DbTool;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Alert;
import org.zblog.zenghelper.util.PublicRes;

/**
 * <br><strong>Z英语学习助手－SearchScreen－删除单词或中文词语屏幕</strong><br>
 * <br>该屏幕是隶属于SearchScreen下的子屏幕，用于修改英文单词或中文词语．
 *
 * @author <a href="mailto:[e-mail]">朱传伟</a><br>
 * <a href="http://www.zblog.org">www.zblog.org</a></p>
 * @version <strong>ZEnHelper</strong> Ver 1.0
 */

public class DelWordScreen extends Form implements CommandListener,Runnable{
    public SearchScreen ss=null;
    public DbTool dt=DbTool.getInstance();
    public PublicRes pr=PublicRes.getInstance();
    public DelWordScreen(String str,SearchScreen s) {
        super("删除"+str+"提示");
        ss=s;
        StringItem note=new StringItem("　","\n\n你确定要删除该"+str+"吗？");
        append(note);
        Command ok=new Command("确定",Command.OK,1);
        Command cancel=new Command("取消",Command.CANCEL,1);
        addCommand(ok);
        addCommand(cancel);
        setCommandListener(this);
    }

    public void commandAction(Command command, Displayable displayable) {
        String lb=command.getLabel();
        if(lb.equals("确定")){
            Alert message=new Alert("执行删除操作","  程序正在执行删除操作，请稍后.....",pr.busyImage,AlertType.CONFIRMATION);
            message.setTimeout(60000000);
            Navigator.show(message);
            Thread init=new Thread(this);
            init.start();
        }
        else if(lb.equals("取消")){
            Navigator.show(ss);
        }
    }

    /**
     * 因为删除可能需要一段事件，所以开启一个新线程来执行删除操作
     */
    public void run() {
        String message=null;
        if(ss.isEn){
            if(dt.delEnWord(ss.current)!=-1)
                message="\n删除单词成功！";
            else
                message="\n删除单词失败！";
        }
        else{
            if(dt.delCnWord(ss.current)!=-1)
                message="\n删除解释成功！";
            else
                message="\n删除解释失败！";
        }
        Alert mess=new Alert("执行删除结果",message,pr.busyImage,AlertType.CONFIRMATION);
        mess.setTimeout(Alert.FOREVER);
        ss.clear();
        Navigator.display.setCurrent(mess,ss);
    }
}