datefieldtest.java

java手机程序开发光盘源码（第六章）

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.*;

public class DateFieldTest extends MIDlet implements Runnable, CommandListener{

	Display display;
	Form form;
	DateField schedule;
	Command exitCmd;
	Command resetCmd;
	Command changeCmd;
	Command okCmd;
	Command cancelCmd;
	Command stopCmd;
	Ticker alarm;
	TextBox editor;
	Thread thread;
	boolean stop = false;

	public DateFieldTest(){
		display = Display.getDisplay(this);
		form = new Form("会议登陆");
		schedule = new DateField("新增会议",DateField.DATE_TIME);
		alarm = new Ticker("尚无即将召开的会议");
		editor = new TextBox("输入会议名称","",10,TextField.ANY);
		thread = new Thread(this);
		exitCmd = new Command("退出", Command.EXIT, 1);
		changeCmd = new Command("修改会议名称", Command.SCREEN, 1);
		resetCmd = new Command("重设", Command.SCREEN, 2);
		okCmd = new Command("确定", Command.OK, 1);
		stopCmd = new Command("关闭声音", Command.STOP, 1);
		cancelCmd = new Command("取消", Command.CANCEL, 1);
		form.setTicker(alarm);
		form.append(schedule);
		form.addCommand(exitCmd);
		form.addCommand(resetCmd);
		form.addCommand(changeCmd);
		form.setCommandListener(this);
		editor.addCommand(okCmd);
		editor.addCommand(cancelCmd);
		editor.setCommandListener(this);
	}

	public void startApp(){
		display.setCurrent(form);
		thread.start();
	}

	public void run(){
		while(true){
			Date current = new Date();
			Date set = schedule.getDate();
			if((set!=null) && ((set.getTime()-current.getTime()) < 1000)){
				form.addCommand(stopCmd);
				alarm.setString("会议时间到！");
				while(!stop){
					try{
						Thread.sleep(5000);
						AlertType.ALARM.playSound(display);
					}catch(Exception ex){}
				}
				form.removeCommand(stopCmd);
				break;
			}
		}
	}

	public void pauseApp(){
	}

	public void destroyApp(boolean unconditional){
	}

	public void commandAction(Command c, Displayable d){
		if(c == exitCmd){
			destroyApp(true);
			notifyDestroyed();
		}
		else if(c == changeCmd){
			display.setCurrent(editor);
		}
		else if(c == resetCmd){
			schedule.setDate(new Date());
		}
		else if(c == stopCmd){
			stop = true;
		}
		else if(c == okCmd){
			schedule.setLabel(editor.getString());
			display.setCurrent(form);
		}
		else if(c == cancelCmd){
			display.setCurrent(form);
		}
	}
}