[shalini.mishra]

hi,
i am creating on application in J2ME using MMAPI.
i create one video player by using j2me wirelesstool kit.
its working properly on emulator. but when i install the .jad file and .jar file in the handset. i am not able to install even a single file in that phone.
what is the actual problem as i am using N75 handset for testing my application. is there any licsence problem? i am also trying to play a 3gp file in that player but for 3gp file it is not even working on emulator.

i attached my piece of code here so that u tell me where is the problem.
Please reply me on shalini.mishra@bhartitelesoft.com


import java.util.Hashtable;
import java.util.Enumeration;

import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.CommandListener;

import javax.microedition.media.Player;
import javax.microedition.media.Control;
import javax.microedition.media.Manager;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.VideoControl;

public class MediaMIDlet extends MIDlet
implements CommandListener, PlayerListener {

private Display display;
private List itemList;
private Form form;

private Command stopCommand;
private Command pauseCommand;
private Command startCommand;

private Hashtable items;
private Hashtable itemsInfo;

private Player player;

public MediaMIDlet() {

display = Display.getDisplay(this);

// creates an item list to let you select multimedia files to play
itemList = new List("Select an item to play", List.IMPLICIT);

// stop, pause and restart commands
stopCommand = new Command("Stop", Command.STOP, 1);
pauseCommand = new Command("Pause", Command.ITEM, 1);
startCommand = new Command("Start", Command.ITEM, 1);

// a form to display when items are being played
form = new Form("Playing media");

// the form acts as the interface to stop and pause the media
form.addCommand(stopCommand);
form.addCommand(pauseCommand);
form.setCommandListener(this);

// create a hashtable of items
items = new Hashtable();

// and a hashtable to hold information about them
itemsInfo = new Hashtable();

// and populate both of them


items.put("Siren from jar", "file://siren.wav");
itemsInfo.put("Siren from jar", "audio/x-wav");

items.put("Promo Video from jar", "file://promo.mpg");
itemsInfo.put("Promo Video from jar", "video/mpeg");



}

public void startApp() {

// when MIDlet is started, use the item list to display elements
for(Enumeration en = items.keys(); en.hasMoreElements();) {
itemList.append((String)en.nextElement(), null);
}

itemList.setCommandListener(this);

// show the list when MIDlet is started
display.setCurrent(itemList);
}

public void pauseApp() {
// pause the player
try {
if(player != null) player.stop();
} catch(Exception e) {}
}

public void destroyApp(boolean unconditional) {
if(player != null) player.close(); // close the player
}

public void commandAction(Command command, Displayable disp) {

// generic command handler

// if list is displayed, the user wants to play the item
if(disp instanceof List) {
List list = ((List)disp);

String key = list.getString(list.getSelectedIndex());

// try and play the selected file
try {
playMedia((String)items.get(key), key);
} catch (Exception e) {
System.err.println("Unable to play: " + e);
e.printStackTrace();
}
} else if(disp instanceof Form) {

// if showing form, means the media is being played
// and the user is trying to stop or pause the player
try {

if(command == stopCommand) { // if stopping the media play

player.close(); // close the player
display.setCurrent(itemList); // redisplay the list of media
form.removeCommand(startCommand); // remove the start command
form.addCommand(pauseCommand); // add the pause command

} else if(command == pauseCommand) { // if pausing

player.stop(); // pauses the media, note that it is called stop
form.removeCommand(pauseCommand); // remove the pause command
form.addCommand(startCommand); // add the start (restart) command
} else if(command == startCommand) { // if restarting

player.start(); // starts from where the last pause was called
form.removeCommand(startCommand);
form.addCommand(pauseCommand);
}
} catch(Exception e) {
System.err.println(e);
}
}

}

/* Creates Player and plays media for the first time */
private void playMedia(String locator, String key) throws Exception {

// locate the actual file, we are only dealing
// with file based media here
String file = locator.substring(
locator.indexOf("file://") + 6,
locator.length());

// create the player
// loading it as a resource and using information about it
// from the itemsInfo hashtable
player =
Manager.createPlayer(
getClass().getResourceAsStream(file), (String)itemsInfo.get(key));

// a listener to handle player events like starting, closing etc
player.addPlayerListener(this);

player.setLoopCount(-1); // play indefinitely
player.prefetch(); // prefetch
player.realize(); // realize

player.start(); // and start

}

/* Handle player events */
public void playerUpdate(Player player, String event, Object eventData) {

// if the event is that the player has started, show the form
// but only if the event data indicates that the event relates to newly
// stated player, as the STARTED event is fired even if a player is
// restarted. Note that eventData indicates the time at which the start
// event is fired.
if(event.equals(PlayerListener.STARTED) &&
new Long(0L).equals((Long)eventData)) {

// see if we can show a video control, depending on whether the media
// is a video or not
VideoControl vc = null;
if((vc = (VideoControl)player.getControl("VideoControl")) != null) {
Item videoDisp =
(Item)vc.initDisplayMode(vc.USE_GUI_PRIMITIVE, null);
form.append(videoDisp);
}

display.setCurrent(form);
} else if(event.equals(PlayerListener.CLOSED)) {

form.deleteAll(); // clears the form of any previous controls
}
}

}

[hartti]

You should contact your Nokia contact in this case as it looks like you have gotten this N75 prototype from someone in Nokia.

Hartti

[jimgilmour1]

This program as it stands fails on my Nokia E61.
By using Netbeans and netbeans mobile extensions
http://java.sun.com/j2se/1.5.0/download-netbeans.html
"Mobility Pack for CLDC/MIDP"
http://www.netbeans.org/products/index.html

I found the error message is that the input file is null from the line

PHP Code:

player =
Manager.createPlayer(
getClass().getResourceAsStream(file), (String)itemsInfo.get(key)); 


In Netbeans console you get the error from the lines
try {
playMedia((String)items.get(key), key);
} catch (Exception e) {
System.err.println("Unable to play: " + e);e.printStackTrace();

Unable to play:
To get this message out on a mobile you must use the
alert message. The try catch makes the program continue so no error exception is seen.


like

Alert alert = new Alert("("Unable to play: ",null,null);

The System.err.println causes errors as this function does not exist in real phones.

Netbeans allows you the step through your program stepping line by line and breakpoints
also you can see variables by hovering over the variable.


Thanks,
Jim

[jimgilmour1]

Hi shalini.mishra,
I have now modified the code to support .3gp video file format which is supported by the Nokia 6230i video camera format.

This also run on the Nokia E61 and I have added Alert support instead of system.println using a 5 second delay.

--------------------------------------------------------------------
import java.util.Hashtable;
import java.util.Enumeration;

import java.io.InputStream;

import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.CommandListener;

import javax.microedition.media.Player;
import javax.microedition.media.Control;
import javax.microedition.media.Manager;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.VideoControl;

public class MediaMIDlet extends MIDlet
implements CommandListener, PlayerListener {

private Display display;
private List itemList;
private Form form;

private Command stopCommand;
private Command pauseCommand;
private Command startCommand;

private Hashtable items;
private Hashtable itemsInfo;

private Player player;

private InputStream in;

public MediaMIDlet() {

display = Display.getDisplay(this);

// creates an item list to let you select multimedia files to play
itemList = new List("Select an item to play", List.IMPLICIT);

// stop, pause and restart commands
stopCommand = new Command("Stop", Command.STOP, 1);
pauseCommand = new Command("Pause", Command.ITEM, 1);
startCommand = new Command("Start", Command.ITEM, 1);

// a form to display when items are being played
form = new Form("Playing media");

// the form acts as the interface to stop and pause the media
form.addCommand(stopCommand);
form.addCommand(pauseCommand);
form.setCommandListener(this);

// create a hashtable of items
items = new Hashtable();

// and a hashtable to hold information about them
itemsInfo = new Hashtable();

// and populate both of them


items.put("Siren from jar", "file://siren.wav");
itemsInfo.put("Siren from jar", "audio/x-wav");

items.put("Promo Video from jar", "file://VideoClip.3gp");
itemsInfo.put("Promo Video from jar", "video/3gpp");



}

public void startApp() {

// when MIDlet is started, use the item list to display elements
for(Enumeration en = items.keys(); en.hasMoreElements();) {
itemList.append((String)en.nextElement(), null);
}

itemList.setCommandListener(this);

// show the list when MIDlet is started
display.setCurrent(itemList);
}

public void pauseApp() {
// pause the player
try {
if(player != null) player.stop();
} catch(Exception e) {}
}

public void destroyApp(boolean unconditional) {
if(player != null) player.close(); // close the player
}

public void commandAction(Command command, Displayable disp) {
// generic command handler

// if list is displayed, the user wants to play the item
if(disp instanceof List) {
List list = ((List)disp);

String key = list.getString(list.getSelectedIndex());

// try and play the selected file
try {
playMedia((String)items.get(key), key);
} catch (Exception e) {
String ae = ("Unable to play: " + e);
alertError(ae);
e.printStackTrace();
}
} else if(disp instanceof Form) {

// if showing form, means the media is being played
// and the user is trying to stop or pause the player
try {

if(command == stopCommand) { // if stopping the media play

player.close(); // close the player
display.setCurrent(itemList); // redisplay the list of media
form.removeCommand(startCommand); // remove the start command
form.addCommand(pauseCommand); // add the pause command

} else if(command == pauseCommand) { // if pausing

player.stop(); // pauses the media, note that it is called stop
form.removeCommand(pauseCommand); // remove the pause command
form.addCommand(startCommand); // add the start (restart) command
} else if(command == startCommand) { // if restarting

player.start(); // starts from where the last pause was called
form.removeCommand(startCommand);
form.addCommand(pauseCommand);
}
} catch(Exception e) {
String ae = ("Unable to play: " + e);
alertError(ae);

}
}
}

/* Creates Player and plays media for the first time */
private void playMedia(String locator, String key) throws Exception {

// locate the actual file, we are only dealing
// with file based media here
String file = locator.substring(locator.indexOf("file://") + 6,locator.length());



// create the player
// loading it as a resource and using information about it
// from the itemsInfo hashtable


//in = getClass().getResourceAsStream(file, itemInfStr);
in = getClass().getResourceAsStream("VideoClip.3gp");
String itemInfStr = (String) itemsInfo.get(key);
String itemInfStr2 = (String) itemsInfo.get(key);
player = Manager.createPlayer(in, itemInfStr);

// a listener to handle player events like starting, closing etc
player.addPlayerListener(this);

player.setLoopCount(-1); // play indefinitely
player.prefetch(); // prefetch
player.realize(); // realize

player.start(); // and start

}

/* Handle player events */
public void playerUpdate(Player player, String event, Object eventData) {

// if the event is that the player has started, show the form
// but only if the event data indicates that the event relates to newly
// stated player, as the STARTED event is fired even if a player is
// restarted. Note that eventData indicates the time at which the start
// event is fired.
if(event.equals(PlayerListener.STARTED) &&
new Long(0L).equals((Long)eventData)) {

// see if we can show a video control, depending on whether the media
// is a video or not
VideoControl vc = null;
if((vc = (VideoControl)player.getControl("VideoControl")) != null) {
Item videoDisp =
(Item)vc.initDisplayMode(vc.USE_GUI_PRIMITIVE, null);
form.append(videoDisp);
}

display.setCurrent(form);
} else if(event.equals(PlayerListener.CLOSED)) {

form.deleteAll(); // clears the form of any previous controls
}
}
public void alertError(String message)
{
Alert alert = new Alert("Error", message, null, AlertType.ERROR);
alert.setTimeout(5000); ;
Display display = Display.getDisplay(this);
Displayable current = display.getCurrent();
if (!(current instanceof Alert))
{
// This next call can't be done when current is an Alert
display.setCurrent(alert, current);
}
}

}
---------------------------------------------------------------------
Good Luck
Jim