showimageitem.java

编写j2me程序时,必备的midlet扩展类.

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

public class ShowImageItem extends MIDlet implements CommandListener 
{ 
private Display display; 
private Form props; 
private Image img; 
private ImageItem imgItem; 

private Command exitCommand = new Command("Exit", Command.EXIT, 1); 

public ShowImageItem() 


{ 
display = Display.getDisplay(this); 
} 

public void startApp() 
{ 
props = new Form("Hello World"); 
//props.append("Hello World!\n"); 
try 
{ 
img=Image.createImage("JavaPowered-8.png"); 
imgItem=new ImageItem("Default Layout", 
img,ImageItem.LAYOUT_DEFAULT,"Image Cannot be 
shown"); 
props.append(imgItem); 
props.append(new ImageItem("Left Layout", 
img,ImageItem.LAYOUT_LEFT,"Image Cannot be 
shown")); 
props.append(new ImageItem("Center Layout", 
img,ImageItem.LAYOUT_CENTER,"Image Cannot be 
shown")); 
} 


catch(Exception fe) 
{ 
//to do nothing 
} 

props.addCommand(exitCommand); 
props.setCommandListener(this); 
display.setCurrent(props); 
} 

public void commandAction(Command c, Displayable s) 
{ 
if (c == exitCommand) 
{ 
destroyApp(false); 
notifyDestroyed(); 
} 
} 

public void destroyApp(boolean unconditional) 
{ 
}

public void pauseApp() 
{ 
display.setCurrent(null); 
props = null; 
} 

}