listrecord.java

支持蓝牙的手机游戏 支持蓝牙的手机游戏的分析与实现

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package org.challenge.chengshi.record;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.rms.InvalidRecordIDException;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.rms.RecordStoreNotOpenException;
import org.challenge.chengshi.MainMidlet;

/**
 *
 * 列表显示游戏的记录
 * @author challenge
 */
public class ListRecord extends List implements CommandListener {
    MainMidlet mid;
    Command back=new Command("返回",Command.BACK,1);
    Record record;
    public ListRecord(MainMidlet mid){
        super("记录列表",List.IMPLICIT);
        this.mid=mid;
        init();
        this.addCommand(back);
        this.setCommandListener(this);
    }
    //初始化
    private void init(){
        this.record=new Record();
        RecordEnumeration em=this.record.getRecord();
        if(em!=null&&em.numRecords()>0){
            while(em.hasNextElement()){
                try {
                    this.append(new String(em.nextRecord()), null);
                } catch (InvalidRecordIDException ex) {
                    ex.printStackTrace();
                } catch (RecordStoreNotOpenException ex) {
                    ex.printStackTrace();
                } catch (RecordStoreException ex) {
                    ex.printStackTrace();
                }
            }
        }else{
            this.append("暂无记录", null);
        }
        show();
    }
    
    private void show(){
        Display.getDisplay(this.mid).setCurrent(this);
    }

    public void commandAction(Command cmd, Displayable display) {
        if(cmd==this.back){
            this.mid.show();
        }
    }

}