如何玩轉 Android MediaPlayer之Media Proxy

這是我們為大家提供的一篇介紹如何玩轉 Android MediaPlayer之Media Proxy的文章，接下來就讓我們一起來了解一下吧！

先來看看本文程序運行的截屏動畫：

再來看看程序運行時輸出的Log信息.....這裡是關鍵：

07-29 15:51:30.692: E/HttpGetProxy(449): ..........sckPlayer connected.......... MediaPlayer發出請求

07-29 15:51:30.692: E/to Media Server---->(449): GET /vids/family_guy_penis_car.3gp HTTP/1.1

07-29 15:51:30.692: E/to Media Server---->(449): User-Agent: stagefright/1.0 (Linux;Android 2.2)

07-29 15:51:30.692: E/to Media Server---->(449): Host: daily3gp.com

07-29 15:51:30.692: E/to Media Server---->(449):

07-29 15:51:31.119: E/HttpGetProxy(449): ..........remote Server connected..........

07-29 15:51:31.122: E/HttpGetProxy(449): ..........remote start to receive..........

07-29 15:51:31.775: E/from Media Server---->(449): HTTP/1.1 200 OK

07-29 15:51:31.775: E/from Media Server---->(449): Date: Sun, 29 Jul 2012 15:51:33 GMT

07-29 15:51:31.775: E/from Media Server---->(449): Server: Apache

07-29 15:51:31.775: E/from Media Server---->(449): Last-Modified: Thu, 14 Jan 2010 23:29:02 GMT

07-29 15:51:31.775: E/from Media Server---->(449): Accept-Ranges: bytes

07-29 15:51:31.775: E/from Media Server---->(449): Content-Length: 754777

07-29 15:51:31.775: E/from Media Server---->(449): Content-Type: video/3gpp

07-29 15:51:34.512: E/HttpGetProxy(449): ..........sckPlayer connected..........MediaPlayer發出請求

07-29 15:51:34.532: E/to Media Server---->(449): GET /vids/family_guy_penis_car.3gp HTTP/1.1

07-29 15:51:34.532: E/to Media Server---->(449): User-Agent: stagefright/1.0 (Linux;Android 2.2)

07-29 15:51:34.532: E/to Media Server---->(449): Host: daily3gp.com

07-29 15:51:34.532: E/to Media Server---->(449): Range: bytes=720896-

07-29 15:51:34.532: E/to Media Server---->(449):

07-29 15:51:34.873: E/HttpGetProxy(449): ..........remote Server connected..........

07-29 15:51:34.873: E/HttpGetProxy(449): ..........remote start to receive..........

07-29 15:51:35.505: E/from Media Server---->(449): HTTP/1.1 206 Partial Content

07-29 15:51:35.505: E/from Media Server---->(449): Date: Sun, 29 Jul 2012 15:51:36 GMT

07-29 15:51:35.505: E/from Media Server---->(449): Server: Apache

07-29 15:51:35.505: E/from Media Server---->(449): Last-Modified: Thu, 14 Jan 2010 23:29:02 GMT

07-29 15:51:35.505: E/from Media Server---->(449): Accept-Ranges: bytes

07-29 15:51:35.505: E/from Media Server---->(449): Content-Length: 33881

07-29 15:51:35.505: E/from Media Server---->(449): Content-Range: bytes 720896-754776/754777

07-29 15:51:35.505: E/from Media Server---->(449): Content-Type: video/3gpp

07-29 15:51:38.754: E/HttpGetProxy(449): ..........over..........

07-29 15:51:51.461: E/HttpGetProxy(449): ..........sckPlayer connected..........MediaPlayer發出請求

07-29 15:51:51.471: E/to Media Server---->(449): GET /vids/family_guy_penis_car.3gp HTTP/1.1

07-29 15:51:51.471: E/to Media Server---->(449): User-Agent: stagefright/1.0 (Linux;Android 2.2)

07-29 15:51:51.471: E/to Media Server---->(449): Host: daily3gp.com

07-29 15:51:51.471: E/to Media Server---->(449): Range: bytes=196608-

07-29 15:51:51.471: E/to Media Server---->(449):

07-29 15:51:51.722: E/HttpGetProxy(449): ..........remote Server connected..........

07-29 15:51:51.722: E/HttpGetProxy(449): ..........remote start to receive..........

07-29 15:51:52.285: E/from Media Server---->(449): HTTP/1.1 206 Partial Content

07-29 15:51:52.285: E/from Media Server---->(449): Date: Sun, 29 Jul 2012 15:51:53 GMT

07-29 15:51:52.285: E/from Media Server---->(449): Server: Apache

07-29 15:51:52.285: E/from Media Server---->(449): Last-Modified: Thu, 14 Jan 2010 23:29:02 GMT

07-29 15:51:52.285: E/from Media Server---->(449): Accept-Ranges: bytes

07-29 15:51:52.285: E/from Media Server---->(449): Content-Length: 558169

07-29 15:51:52.285: E/from Media Server---->(449): Content-Range: bytes 196608-754776/754777

07-29 15:51:52.285: E/from Media Server---->(449): Content-Type: video/3gpp

07-29 15:51:54.812: E/HttpGetProxy(449): ..........sckPlayer connected..........MediaPlayer發出請求

07-29 15:51:54.822: E/to Media Server---->(449): GET /vids/family_guy_penis_car.3gp HTTP/1.1

07-29 15:51:54.822: E/to Media Server---->(449): User-Agent: stagefright/1.0 (Linux;Android 2.2)

07-29 15:51:54.822: E/to Media Server---->(449): Host: daily3gp.com

07-29 15:51:54.822: E/to Media Server---->(449): Range: bytes=589824-

07-29 15:51:54.822: E/to Media Server---->(449):

07-29 15:51:55.117: E/HttpGetProxy(449): ..........remote Server connected..........

07-29 15:51:55.117: E/HttpGetProxy(449): ..........remote start to receive..........

07-29 15:51:55.693: E/from Media Server---->(449): HTTP/1.1 206 Partial Content

07-29 15:51:55.693: E/from Media Server---->(449): Date: Sun, 29 Jul 2012 15:51:57 GMT

07-29 15:51:55.693: E/from Media Server---->(449): Server: Apache

07-29 15:51:55.693: E/from Media Server---->(449): Last-Modified: Thu, 14 Jan 2010 23:29:02 GMT

07-29 15:51:55.693: E/from Media Server---->(449): Accept-Ranges: bytes

07-29 15:51:55.693: E/from Media Server---->(449): Content-Length: 164953

07-29 15:51:55.693: E/from Media Server---->(449): Content-Range: bytes 589824-754776/754777

07-29 15:51:55.693: E/from Media Server---->(449): Content-Type: video/3gpp

07-29 15:51:59.620: E/HttpGetProxy(449): ..........over..........

從截屏動畫和Log信息看出，手動seek一次，但MediaPlayer進行了多次Range請求，這說明了“MediaPlayer會自動seek”，或許與MediaPlayer本地緩存有關。另外，不同硬解廠家實現的MediaPlayer估計會有不同的操作。

本文的代碼可以到這裡下載:

http://download.csdn.net/detail/hellogv/4463651

HttpGetProxy.JAVA還是本文的關鍵部分：

[java] view plaincopyprint?

public class HttpGetProxy {

final static private String TAG = "HttpGetProxy";

final static private String LOCAL_IP_ADDRESS_1 = "127.0.0.1";

final static private String LOCAL_IP_ADDRESS_2 = "10.0.2.2";

final static private int HTTP_PORT = 80;

final static private String HTTP_END="\r\n\r\n";

/**代理服務器使用的端口*/

private int proxy_ip_port;

/**鏈接帶的端口*/

private String original_ip_port;

/**遠程服務器地址*/

private String remoteHost;

/**本地服務器地址*/

private String localHost;

private ServerSocket localServer = null;

/**收發Media Player請求的Socket*/

private Socket sckPlayer = null;

/**收發Media Server請求的Socket*/

private Socket sckServer = null;

private SocketAddress address;

/**

* 初始化代理服務器

* @param localport 代理服務器監聽的端口

*/

public HttpGetProxy(int localport) {

try {

_HttpGetProxy(LOCAL_IP_ADDRESS_1,localport);