calendardemo.java

J2ME MIDP 2.0 无线设备编程的一些源码

//CalendarDemo.java file
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import java.util.*;
import calendar.*;

public class CalendarDemo extends MIDlet 
                        implements CommandListener,ImportDateFilter,DateSelectListener
{
    private Command exitCommand, testCommand;
    private TextBox tb;
    private CalendarCanvas myCanvas;
    private int [][]holiday={{1,1},{3,8},{5,1},{6,1},{10,1}};//保存每年的节日
    public CalendarDemo()
    {
        exitCommand =new Command("Exit",Command.EXIT,9);
        testCommand =new Command("Calendar",Command.SCREEN,1);
        tb = new TextBox("demo","CalendarDemo MIDlet",40,0);
        tb.addCommand(exitCommand);
        tb.addCommand(testCommand);
        tb.setCommandListener(this);
        //创建日历对象
        myCanvas =new CalendarCanvas(new Date());
        myCanvas.setImportDateFilter(this);
        myCanvas.setDateSelectListener(this);
        //为了在日历界面中也能退出程序，添加了新的命令并替换了命令处理对象
        myCanvas.addCommand(exitCommand);
        myCanvas.setCommandListener(this);
    }
    protected void startApp(  ) throws MIDletStateChangeException
    {
        Display.getDisplay(this).setCurrent(tb);
    }

    protected void pauseApp(  )
    {
    }

    protected void destroyApp( boolean p1 )
    {
    }

    public void commandAction(Command c,Displayable d)
    {//处理命令
        if (c ==exitCommand)
        {
            destroyApp(false);
            notifyDestroyed();
        }
        else if (c ==testCommand)
        {//切换到日历界面
            Display.getDisplay(this).setCurrent(myCanvas);
        }
        else if(d == myCanvas)
        {//对于来自CalendarCanvas 对象的命令发送给对象自己处理
            myCanvas.commandAction(c,d);
        }
    }
    //实现 ImportDateFilter 接口，判断日期类型
    public int isImportantDate(Calendar date)
    {
        int dayOW = date.get(Calendar.DAY_OF_WEEK );
        if(dayOW == Calendar.SATURDAY || dayOW == Calendar.SUNDAY)
        {//周末作为假日
            return HOLIDAY;
        }
        int dayOM = date.get(Calendar.DAY_OF_MONTH);
        int month = date.get(Calendar.MONTH);
        for(int i=0;i<holiday.length;i++)
        {//判断是否法定节日
            if(dayOM == holiday[i][1] && month+1== holiday[i][0])
                return HOLIDAY;
        }
        if(dayOM == 2 && month ==0)
        {//用于测试目的，1月2日设置为包含有重要事件的节日
            return BOTH;
        }
        if((dayOM == 26 || dayOM==27) && month ==0)
        {//用于测试目的，1月26日和1月27日设置为包含有重要事件的日期
            return IMPORTANTDAY;
        }
        return NORMALDAY;
    }
    //实现 DateSelectListener 接口，处理日期被选择的事件
    public void dateSelected(CalendarCanvas c, Calendar date)
    {
        Display.getDisplay(this).setCurrent(tb);//显示TextBox作为界面
        String dateStr="date="+ date.get(Calendar.YEAR)+"/" ;
        dateStr +=(date.get(Calendar.MONTH)+1) +"/" +date.get(Calendar.DAY_OF_MONTH);
        tb.setString(dateStr);//显示被选择的日期
    }
}