J2ME: Play videos

[sergiofil]

Hello, i´m new in Java, and i need to play videos in Mobile. So, i read about that and i try the follow code:

package P2_ManagerPKG;

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

public class P2_mng  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 P2_mng () {
    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("Promo Video from jar", "file://localhost/E:/Videos/movie1.3gp");
    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) {
        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 {

    
    // create the player
    // loading it as a resource and using information about it
    // from the itemsInfo hashtable
    player = Manager.createPlayer(getClass().getResourceAsStream("file://localhost/E:/Videos/movie1.3gp"), "video/3gpp");

    // 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
	}
  }
}

The movie1.3gp is in the correct directory, and when i press "Choose" nothing happens in Mobile, but in the output window ( in netbeans) appears:

"Series 40 Nokia 6212 NFC SDK" Instance #6212000 Ready for Future Connections
at javax.microedition.media.Manager.createPlayer(Manager.java:228)
at P2_ManagerPKG.P2_mng.playMedia(P2_mng.java:145)
at P2_ManagerPKG.P2_mng.commandAction(P2_mng.java:102)
at javax.microedition.lcdui.Display.consumeDisplayEvent(+731)
at javax.microedition.lcdui.Display$DisplayAccessor.consumeEvent(+109)
at com.nokia.mid.impl.isa.ui.EventDispatcher.run(EventDispatcher.java:354)
Unable to play: java.lang.IllegalArgumentException: Param is null
java.lang.IllegalArgumentException: Param is null


Anyone can help me with this problem??

Thank´s.

[ektasrv]

I feel the issue is with

player = Manager.createPlayer(getClass().getResourceAsStream("file://localhost/E:/Videos/movie1.3gp"), "video/3gpp");

getResourceAsStream("file://localhost/E:/Videos/movie1.3gp") can be used only if the 3gp file is in the resource folder of your project i.e. its a part of your deployable JAR file that goes on the device.

If you want to play something from localhost - server, you can directly pass the server URI to create the player.

Player p = Manager.createPlayer("http://localhost/movie1.3gp");
if this file is available on the webserver hosted on the localhost.

[sergiofil]

I feel the issue is with

player = Manager.createPlayer(getClass().getResourceAsStream("file://localhost/E:/Videos/movie1.3gp"), "video/3gpp");

getResourceAsStream("file://localhost/E:/Videos/movie1.3gp") can be used only if the 3gp file is in the resource folder of your project i.e. its a part of your deployable JAR file that goes on the device.

If you want to play something from localhost - server, you can directly pass the server URI to create the player.

Player p = Manager.createPlayer("http://localhost/movie1.3gp");
if this file is available on the webserver hosted on the localhost.

Hi, you were right, that was the problem. I put the movie in res folder and put

player = Manager.createPlayer(getClass().getResourceAsStream("/res/movie1.3gp"), "video/3gpp");

and now works fine.

Thank you very much for helping me.