Java Tutorial/J2ME/mp3

MetaData Control

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.List; import javax.microedition.media.Manager; import javax.microedition.media.Player; import javax.microedition.media.control.MetaDataControl; import javax.microedition.midlet.MIDlet; public class MetaDataControlMIDlet extends MIDlet implements CommandListener {

 private Display display = null;
 private List list = new List("Message", List.IMPLICIT);
 private Command exitCommand = new Command("Exit", Command.EXIT, 1);
 private Alert alert = new Alert("Message");
 private Player player = null;
 public MetaDataControlMIDlet() {
   display = Display.getDisplay(this);
   alert.addCommand(exitCommand);
   alert.setCommandListener(this);
   list.addCommand(exitCommand);
   list.setCommandListener(this);
   try {
     player = Manager.createPlayer(getClass().getResourceAsStream("/s.mp3"), "audio/mp3");
     player.prefetch();
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
 public void startApp() {
   if (player != null) {
     MetaDataControl mControl = (MetaDataControl) player
         .getControl("javax.microedition.media.control.MetaDataControl");
     if (mControl == null) {
       alert.setString("No Meta Information");
       display.setCurrent(alert);
     } else {
       String[] keys = mControl.getKeys();
       for (int i = 0; i < keys.length; i++) {
         list.append(keys[i] + " -- " + mControl.getKeyValue(keys[i]), null);
       }
       display.setCurrent(list);
     }
   }
 }
 public void commandAction(Command cmd, Displayable disp) {
   if (cmd == exitCommand) {
     notifyDestroyed();
   }
 }
 public void pauseApp() {
 }
 public void destroyApp(boolean unconditional) {
 }

}</source>