midlet3.java

这是郭克华老师的J2ME视频的源代码

package prj3_1;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class MIDlet3 extends MIDlet implements CommandListener{

	private Form frm = new Form("请您选择相应操作");
	private Display dis;
	private Command cmdDel = new Command("删除该号码",Command.SCREEN,1);
	private Command cmdEdit = new Command("编辑该号码",Command.SCREEN,1);
	private Command cmdExit = new Command("退出程序",Command.SCREEN,1);
	private Command cmdBack = new Command("返回",Command.BACK,1);
	
	public MIDlet3() {
		// TODO Auto-generated constructor stub
	}
	protected void startApp() throws MIDletStateChangeException {
		// TODO Auto-generated method stub
		dis = Display.getDisplay(this);
		dis.setCurrent(frm);
		
		frm.addCommand(cmdDel);
		frm.addCommand(cmdEdit);
		frm.addCommand(cmdExit);
		frm.addCommand(cmdBack);
		
		frm.setCommandListener(this);
	}	
	public void commandAction(Command c,Displayable d){
		if(c==cmdDel || c==cmdEdit){
			frm.append(c.getLabel());
		}
		else if(c==cmdExit){
			this.notifyDestroyed();
		}
		else{
			frm.setTitle("返回");
		}
		/*另一种方法
		if(c.getLabel().equals("删除该号码")){
			
		}.....
		*/
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub
		
	}
	protected void pauseApp() {
		// TODO Auto-generated method stub
	}
	
}