help_ui.java

J2ME移动设备程序设计代码 是头几张的 代码 等

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

public class Help_UI extends MIDlet implements CommandListener{
 		private Display display;
 		private Form form;
		private TextBox tb;
		private Command cmd_Back;
		private Command cmd_Exit;
		private Command cmd_Help;
		
		public Help_UI(){
			display = Display.getDisplay(this);
			form = new Form("form");
			tb= new TextBox("在线帮助","Check help",50,0);
			cmd_Exit=new Command("Exit",Command.EXIT,1);
		    cmd_Help= new Command("Back",Command.SCREEN,1);
			cmd_Back= new Command("Help",Command.BACK,1);
			form.addCommand(cmd_Exit);
			form.addCommand(cmd_Heip);
			tb.addCommand(cmd_Back);
			form.setCommandListener(this);
			tb.setCommandListener(this);
		}
		
		public void startApp(){
			display.setCurrent(form);
		}	
	
		public void pauseApp(){
		
		}
	
		public void destroyApp(boolean unconditional){
		
		}
	
		public void commandAction(Command c,Displayable d){
			if(c==cmd_Exit)	{
				destroyApp(false);
				notifyDestroyed();
			}	
			if(c==cmd_Back)	{
				display.setCurrent(form);
			}
			if(c==cmd_Help){
				display.setCurrent(tb);
			}
		}


}