datefielditemstatelistenerdemo.java

J2ME手机游戏开发技术详解,适合初学者阅读使用

import javax.microedition.lcdui.*;
import java.util.*;
import javax.microedition.midlet.MIDlet;
public class DateFieldItemStateListenerDemo  extends MIDlet implements CommandListener
{
    private final static Command CMD_EXIT = new Command("Exit", Command.EXIT, 1);
    private DateField mDateField;
    private Form mainForm;
    private StringItem stringItem;
    public DateFieldItemStateListenerDemo() {
    mainForm = new Form("DateField演示");
    }                                                        
    protected void startApp() {
            mDateField = new DateField("Date", DateField.DATE_TIME);
            mDateField.setDate(new Date());
            mainForm.append(mDateField);
            stringItem = new StringItem("ItemStateListener:"," ");
            mainForm.append(stringItem);
            mainForm.addCommand(CMD_EXIT);
            mainForm.setCommandListener(this);  
            Display.getDisplay(this).setCurrent(mainForm);
            ItemStateListener listener = new  ItemStateListener(){
            public void itemStateChanged(Item item){
            if(item == mDateField){
            Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
            calendar.setTime(mDateField.getDate());
            Date today = calendar.getTime();
            String timeString = calendar.get(Calendar.YEAR)+"年"+
            getMonth(calendar)+calendar.get(Calendar.DATE)+"日"+
            getWeek(calendar)+calendar.get(Calendar.HOUR_OF_DAY)+"时"+
            getAM_PM(calendar)+calendar.get(Calendar.HOUR)+"时"+
            calendar.get(Calendar.MINUTE)+"分"+
            calendar.get(Calendar.SECOND)+"秒"+
            calendar.get(Calendar.MILLISECOND)+"毫秒";
            stringItem.setText(timeString);          
            }
            }            
            };
            mainForm.setItemStateListener(listener);
    }  
    private String getMonth(Calendar c){
    switch(c.get(Calendar.MONTH)){
    case Calendar.JANUARY:return"一月";
    case Calendar.FEBRUARY:return"二月";
    case Calendar.MARCH:return"三月";
    case Calendar.APRIL:return"四月";
    case Calendar.MAY:return"五月";
    case Calendar.JUNE:return"六月";
    case Calendar.JULY:return"七月";
    case Calendar.AUGUST:return"八月";
    case Calendar.SEPTEMBER:return"九月";
    case Calendar.OCTOBER:return"十月";
    case Calendar.NOVEMBER:return"十一月";
    case Calendar.DECEMBER:return"十二月";
    }
    return null;
    }	
    private String getWeek(Calendar c){
    switch(c.get(Calendar.DAY_OF_WEEK)){
    case Calendar.SUNDAY:return"星期日";
    case Calendar.MONDAY:return"星期一";
    case Calendar.TUESDAY:return"星期二";
    case Calendar.WEDNESDAY:return"星期三";
    case Calendar.THURSDAY:return"星期四";
    case Calendar.FRIDAY:return"星期五";
    case Calendar.SATURDAY:return"星期六";
    };
    return null;
    } 
    private String getAM_PM(Calendar c){
    switch(c.get(Calendar.AM_PM)){
    case Calendar.AM:return"上午";
    case Calendar.PM:return"下午";
    };
    return null;
    }
    protected void destroyApp(boolean unconditional) {
    }    
    protected void pauseApp() {
    }   
    public void commandAction(Command c, Displayable d) {
        if (c == CMD_EXIT) {
            destroyApp(false);
            notifyDestroyed();
        }
    }    
}