ver video en emulador de móvil

Ana
30 de Julio del 2004
He encontrado este ejemplo en la página de sun, lo compilado con JBulder9 y lo he intentado emular, pero a la hora de introducir la URL, en este caso : http://localhost/hoteles/videos/salon.3gp
me lanza la siguiente excepción:
java.io.IOException: failed to connect null
¿Qué es lo que ocurre?

La página sun donde recogí el código es:
http://developers.sun.com/techtopics/mobility/midp/articles/mmapioverview/

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

public class PlayerMIDlet extends MIDlet implements
CommandListener, PlayerListener, Runnable {
private Display display;
private Form form;
private TextField url;
private Command start = new Command("Play",
Command.SCREEN, 1);
private Command stop = new Command("Stop",
Command.SCREEN, 2);
private Player player;

public PlayerMIDlet() {
display = Display.getDisplay(this);
form = new Form("Demo Player");
url = new TextField("Enter URL:", "", 100,
TextField.URL);
form.append(url);
form.addCommand(start);
form.addCommand(stop);
form.setCommandListener(this);
display.setCurrent(form);
}

protected void startApp() {
try {
if(player != null && player.getState() ==
Player.PREFETCHED) {
player.start();
} else {
defplayer();
display.setCurrent(form);
}
}
catch(MediaException me) {
reset();
}
}

protected void pauseApp() {
try {
if(player != null && player.getState() ==
Player.STARTED) {
player.stop();
} else {
defplayer();
}
}
catch(MediaException me) {
reset();
}
}

protected void destroyApp(
boolean unconditional) {
form = null;
try {
defplayer();
}
catch(MediaException me) {
}
}

public void playerUpdate(Player player,
String event, Object data) {
if(event == PlayerListener.END_OF_MEDIA) {
try {
defplayer();
}
catch(MediaException me) {
}
reset();
}
}

public void commandAction(Command c, Displayable d) {
if(c == start) {
start();
} else if(c == stop) {
stopPlayer();
}
}

public void start() {
Thread t = new Thread(this);
t.start();
}

// to prevent blocking, all communication should
// be in a thread
// and not in commandAction
public void run() {
play(getURL());
}

String getURL() {
return url.getString();
}

void play(String url) {
try {
VideoControl vc;
defplayer();
// create a player instance
player = Manager.createPlayer(url);
player.addPlayerListener(this);
// realize the player
player.realize();
vc = (VideoControl)player.getControl(
"VideoControl");
if(vc != null) {
Item video = (Item)vc.initDisplayMode(
vc.USE_GUI_PRIMITIVE, null);
Form v = new Form("Playing Video...");
StringItem si = new StringItem("Status: ",
"Playing...");
v.append(si);
v.append(video);
display.setCurrent(v);
}
player.prefetch();
player.start();
}
catch(Throwable t) {
reset();
}
}

void defplayer() throws MediaException {
if (player != null) {
if(player.getState() == Player.STARTED) {
player.stop();
}
if(player.getState() == Player.PREFETCHED) {
player.deallocate();
}
if(player.getState() == Player.REALIZED ||
player.getState() == Player.UNREALIZED) {
player.close();
}
}
player = null;
}

void reset() {
player = null;
}

void stopPlayer() {
try {
defplayer();
}
catch(MediaException me) {
}
reset();
}
}