datamanager.java

手机理财软件

/**
 * <p>Title: CowriePixie</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: xidian</p>
 * @author yangyong
 * @version 1.0
 */

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.util.Date;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.DateField;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemStateListener;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
/*
 * 创建日期 2005-9-23
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */

/**
 * @author Administrator
 *
 * TODO 要更改此生成的类型注释的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class DataManager extends Form
 implements CommandListener, ItemStateListener {

        private ChoiceGroup cg;
    private Command ok;
    private Command back;
    private Command cancel;
    private Command okdel;
    private DateField sdf;
    private DateField edf;
    private String cgstr[] = {
        "全部删除", "按日期删除"
    };
    private Display dis;
    private boolean datesel;
    private long slong;
    private long elong;
    private long datelong;
    byte field[];

    public DataManager(Display display)
    {
        super("数据维护");
        datesel = false;
        field = new byte[48];
        dis = display;
        cg = new ChoiceGroup("费用清单维护 :", ChoiceGroup.EXCLUSIVE , cgstr, null);
        append(cg);
        sdf = new DateField("起始日期 :", DateField.DATE);
        edf = new DateField("终止日期 :", DateField.DATE);
        ok = new Command("删除", Command.OK, 2);
        addCommand(ok);
        back = new Command("返回", Command.BACK, 2);
        addCommand(back);
        setCommandListener(this);
        setItemStateListener(this);
        cancel = new Command("取消", Command.CANCEL, 2);
        okdel = new Command("确定", Command.OK, 2);
    }

    public void commandAction(Command c, Displayable d)
    {
        if(c == cancel)
            dis.setCurrent(this);
        if(c == okdel)
            ConfDelete();
        if(c == back)
        {
            Main_Form mainform = new Main_Form(dis);
            dis.setCurrent(mainform);
            return;
        }
        if(c == ok)
            ConfDelete();
    }

    void ConfDelete()
    {
        dis.setCurrent(this);
        DeleteFeeDetail();
        Alert alert = new Alert("提示", "                    数据删除完毕", Financing.alert, AlertType.ALARM);
        alert.setTimeout(500);
        dis.setCurrent(alert);
    }

    void DeleteFeeDetail()
    {
        String filename = "fee_detail";
        if(!datesel)
        {
            try
            {
                RecordStore.deleteRecordStore(filename);
            }
            catch(Exception ex)
            {
                return;
            }
            return;
        }
        RecordStore feedetaildb;
        try
        {
            feedetaildb = RecordStore.openRecordStore(filename, true);
        }
        catch(Exception ex)
        {
            return;
        }
        try
        {
            RecordEnumeration re = feedetaildb.enumerateRecords(null, null, false);
            do
            {
                if(!re.hasNextElement())
                    break;
                int id = re.nextRecordId();
                field = feedetaildb.getRecord(id);
                if(Decode())
                    try
                    {
                        feedetaildb.deleteRecord(id);
                    }
                    catch(Exception exception1) { }
            } while(true);
            feedetaildb.closeRecordStore();
        }
        catch(Exception exception) { }
    }

    public boolean Decode()
    {
        try
        {
            int tempint = 0;
            String temp = new String();
            ByteArrayInputStream bis = new ByteArrayInputStream(field);
            DataInputStream dis = new DataInputStream(bis);
            datelong = dis.readLong();
            temp = dis.readUTF();
            temp = dis.readUTF();
            tempint = dis.readInt();
            temp = dis.readUTF();
            dis.close();
            bis.close();
        }
        catch(Exception exception) { }
        return datelong >= slong && datelong <= elong;
    }

    public void itemStateChanged(Item item)
    {
        if(item == cg)
            if(cg.getSelectedIndex() == 0)
            {
                delete(1);
                delete(1);
                datesel = false;
            } else
            {
                datesel = true;
                Date date = new Date();
                insert(1, sdf);
                sdf.setDate(date);
                insert(2, edf);
                edf.setDate(date);
                slong = sdf.getDate().getTime();
                elong = edf.getDate().getTime();
            }
        if(item == sdf)
            slong = sdf.getDate().getTime();
        if(item == edf)
            elong = edf.getDate().getTime();
    }

}