使用索爱V800开发流媒体应用程序

作者：mingjava 文章来源：http://developer.sonyericsson.com

索尼爱立信的V800手机可以支持流媒体的播放，使用非常简单。如果你曾经使用MMAPI播放过声音或者做过照相应用的话，那么上手非常快。

你要做的就是根据指定的URL来创建一个Player，然后启动这个Player。URL的格式如下：rtsp://MyServer/myVideo.3gp。下面的代码例子演示了如何使用：
private void startStreaming(){
try{
myPlayer = Manager.createPlayer("rtsp://MyServer/MyFile.3gp");
myPlayer.addPlayerListener(this);
myPlayer.realize();
// Grab the video control and set it to the current display.
vc = (VideoControl)myPlayer.getControl("VideoControl");
if (vc != null) {
myForm.append((Item)vc.initDisplayMode(vc.USE_GUI_PRIMITIVE, null));
// sets the display size of the video.
vc.setDisplaySize(120,160);
}
myPlayer.start();

}catch(Exception e){
log("Exception: " + e.toString());
}

}
我们需要注意的是进行连接服务器的时候必须在单独线程中处理，而不能在主线程。因为这样会堵塞系统。接下来你要做的就是构建一个支持RTSP的流媒体服务器，放置一个3gp格式的文件在服务器上。下面的代码演示了如何使用V800开发流媒体应用。
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import java.io.*;
import javax.microedition.lcdui.game.*;

/**
* A simple example of the MMAPI (JSR 135) support for Streaming Video
* with the Sony Ericsson V800.
*
* This code is part of the Tips & Tricks section at
* www.SonyEricsson.com/developer
*
* COPYRIGHT All rights reserved Sony Ericsson Mobile Communications AB 2005.
* The software is the copyrighted work of Sony Ericsson Mobile Communications AB.
* The use of the software is subject to the terms of the end-user license
* agreement which accompanies or is included with the software. The software is
* provided "as is" and Sony Ericsson specifically disclaim any warranty or
* condition whatsoever regarding merchantability or fitness for a specific
* purpose, title or non-infringement. No warranty of any kind is made in
* relation to the condition, suitability, availability, accuracy, reliability,
* merchantability and/or non-infringement of the software provided herein.
*
* Written by Jöns Weimarck, January 2005
*/
public class StreamingVideo extends MIDlet implements CommandListener, PlayerListener, Runnable{


private Display myDisplay;
private Form myForm;

private Thread streamingThread;
private Player myPlayer;
private VideoControl vc;
private boolean running=false;

public StreamingVideo() {
myDisplay = Display.getDisplay(this);
myForm=new Form ("Streaming Test");
myForm.addCommand(new Command("Exit", Command.EXIT,0));
myForm.addCommand(new Command("Start", Command.OK,0));
myForm.setCommandListener(this);
}

protected void startApp() throws MIDletStateChangeException {
myDisplay.setCurrent(myForm);
streamingThread = new Thread(this);
}

protected void pauseApp() {}

protected void destroyApp(boolean unconditional) {
try {
myPlayer.stop();
myPlayer.close();
}
catch( Exception e ) {
log("Exception: " + e.toString());
}
}

/**
* Inits and starts the Player for Video Streaming
*/
private void startStreaming(){
try{
myPlayer = Manager.createPlayer("rtsp://MyServer/MyFile.3gp");
myPlayer.addPlayerListener(this);
myPlayer.realize();
// Grab the video control and set it to the current display.
vc = (VideoControl)myPlayer.getControl("VideoControl");
if (vc != null) {
myForm.append((Item)vc.initDisplayMode(vc.USE_GUI_PRIMITIVE, null));
// sets the display size of the video.
vc.setDisplaySize(120,160);
}
myPlayer.start();

}catch(Exception e){
log("Exception: " + e.toString());
}

}

public void commandAction(Command c, Displayable s){
if(c.getCommandType()==Command.EXIT){
running=false;
notifyDestroyed();
}else{
streamingThread.start();
}
}


/**
* PlayerListener Interface method, logs all player event.
*/
public void playerUpdate(Player player, String event, Object eventData){
log(" ** playerUpdate: " + event + " **");

}

public void log(String msg){
System.out.println(msg);
}

public void run() {
running=true;
startStreaming();
while(running){
Thread.yield();
}
}
}

原文请参考：go streaming with v800