midlettwo.java

java手机程序开发光盘源码（第四章）

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

public class MIDletTwo extends MIDlet implements Runnable, CommandListener{

	Thread thread;
	List list;
	int number = 0;
	Display display;
	Command switchCmd;
	Command exitCmd;
	boolean first = true;
	
	public MIDletTwo(){
		list = new List("MIDletTwo", List.IMPLICIT);
		list.append("MIDlet Two:"+number, null);
		thread = new Thread(this);
		switchCmd = new Command("Switch",Command.SCREEN,1);
		exitCmd = new Command("Exit",Command.EXIT,1);
		display = Display.getDisplay(this);
		list.addCommand(switchCmd);
		list.addCommand(exitCmd);
		list.setCommandListener(this);
	}

	public void startApp(){
		
		System.out.println("OK");
		
		if(first){
			thread.start();
			first = false;
		}
		display.setCurrent(list);
	}
	
	public void run(){
		while(true){
			try{
				Thread.sleep(2000);
				number++;
				list.set(0,"MIDlet Two:"+number, null);
			}catch(Exception e){}
		}
	}

	public void pauseApp(){
	}

	public void destroyApp(boolean unconditional){
		thread = null;
	} 

	public void commandAction(Command c, Displayable d){
		if(c == switchCmd){
			pauseApp();
			notifyPaused();	
			resumeRequest();
		}else if(c == exitCmd){
			destroyApp(false);
			notifyDestroyed();
		}
	}
}