My J2ME Programming Exercise (5)--imageitem

Programming
* * * Imageitemlet.java * * Created on April 17, 2005, 8:56

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

/** * * @author   administrator * @version  */public class Imageitemlet extends MIDlet Implements commandlistener,itemcommandlistener{        private Form aform;     Private Image sohuimage;    Private image neimage;    Private Imageitem sohuimageitem;    private Imageitem neimageitem;    private Display adisplay;     Private Command exitcommand;    private command connectcommand;    private Spacer aspacer;    Private Alert analert;            Public Imageitemlet () {        aform=new Form ("Imageitemtest");         exitcommand=new Command ("EXIT", command.exit,1);         connectcommand=new Command ("Connect", command.item,2);       &nbsp Aspacer=new spacer (10,2);        analert=new Alert ("Connecting ...", "Connecting To www.163.com ... ",                Null,alerttype.info);        try{             sohuimage=image.createimage ("/sohu.png");             sohuimageitem=new Imageitem (null,sohuimage,imageitem.layout_right,                     "This is sohu!");                          aspacer.setlayout (Item.layout_expand);

The Profram'll connect to www.163.com and display the Alert//when click the Imageitem of 163.png.

            neimage=image.createimage ("/163.png");             neimageitem=new Imageitem (Null,neimage, imageitem.layout_right,                     "This is 163", Item.hyperlink);             Neimageitem.setitemcommandlistener (This);             Neimageitem.setdefaultcommand (Connectcommand);                         Aform.append ( Sohuimageitem);            aForm.append (aSpacer);             aform.append (Neimageitem);             Aform.addcommand (Exitcommand);            Aform.setcommandlistener (this);       }                         catch (Exception e) {             e.printstacktrace ();        }           }    public void STARTAPP () {        adisplay=display.getdisplay (this);         adisplay.setcurrent (aform);   }        public void Pauseapp () {   }        public void Destroyapp (Boolean Unconditional) {   }        public void commandaction (Command C,disPlayable d) {        if (C==exitcommand) {             Destroyapp (False);             notifydestroyed ();       }   }         public void Commandaction (Command c,item i) {        if (c== Connectcommand) {            aDisplay.setCurrent (AnAlert, aform);       }   }       }

A newer aspect of this program is the use of the midp2.0 and spacer classes of the newly added item class in the. The use of the appearance pattern has been introduced in the Stringitem.

Public spacer (int minwidth, int minheight), spacer class in this program is set to Item.layout_expand, that is, fill the remaining white space. In this way, after running, you can see two Imageitem objects located on both sides of the left and right, the layout of some good-looking.