Thursday, May 31, 2007

J2ME playing 3gp/mp4 file

At this time I'll give you source code for midlet to playing 3gp/mp4 with jsr134, here is source code:



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");



items.put("Video 3GP from jar", "file://l23.3gp");

itemsInfo.put("Video 3GP 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 {



// 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

}

}



}







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