本文来自http://blog.csdn.net/hellogv/ ，引用必须注明出处！
基础篇实现一个简单的代理服务器与Android的MediaPlayer结合(仅支持Http Get)，可以通过代理服务器来转发MediaPlayer的Request以及传输服务器的Response，但基础篇还不能支持Seek，这次提高篇支持了Seek。代理服务器可以增强MediaPlayer对复杂的Http情况的适应，可以播放带防盗链的媒体文件，边播边存，还可以对大体积的媒体文件（如视频）进行多线程预加载，达到快速播放的效果。
本文代码运行在模拟器上，使用Microsoft Network Monitor 3.4来抓包，通过抓包可以发现seek的操作会重新连接服务器，并在Http Get请求中加入Range 字段，所以代理服务器每次监听到MediaPlayer的request都需要新建socket与远程服务器连接。
本文的代码可以到http://download.csdn.net/detail/hellogv/4332362下载，本文程序运行效果如图：
接下来贴出核心代码HttpGetProxy.java：
public class HttpGetProxy { final static private String TAG = "HttpGetProxy"; final static private String LOCAL_IP_ADDRESS = "127.0.0.1"; final static private int HTTP_PORT = 80; private int local_ip_port; private ServerSocket localServer = null; private Socket localSocket = null; private Socket remoteSocket = null; private String remoteHost; private InputStream in_remoteSocket; private OutputStream out_remoteSocket; private InputStream in_localSocket; private OutputStream out_localSocket; private SocketAddress address; private interface OnFinishListener { void onFinishListener(); } /** * 初始化代理服务器 * @param localport 代理服务器监听的端口 */ public HttpGetProxy(int localport) { local_ip_port=localport; try { localServer = new ServerSocket(localport, 1, InetAddress.getByName(LOCAL_IP_ADDRESS)); } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * 结束时，清除所有资源 */ private OnFinishListener finishListener = new OnFinishListener() { @Override public void onFinishListener() { System.out.println("..........release all.........."); Log.e(TAG, "..........release all.........."); try { in_localSocket.close(); out_remoteSocket.close(); in_remoteSocket.close(); out_localSocket.close(); localSocket.close(); remoteSocket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; /** * 把网络URL转为本地URL，127.0.0.1替换网络域名 * @param url 网络URL * @return 本地URL */ public String getLocalURL(String url){ String result = null; URI originalURI=URI.create(url); remoteHost=originalURI.getHost(); if(originalURI.getPort()!=-1){//URL带Port address = new InetSocketAddress(remoteHost, originalURI.getPort());//使用默认端口 result=url.replace(remoteHost+":"+originalURI.getPort(), LOCAL_IP_ADDRESS+":"+local_ip_port); } else{//URL不带Port address = new InetSocketAddress(remoteHost, HTTP_PORT);//使用80端口 result=url.replace(remoteHost,LOCAL_IP_ADDRESS+":"+local_ip_port); } return result; } /** * 启动代理服务器 * @throws IOException */ public void startProxy() throws IOException { new Thread() { public void run() { int bytes_read; byte[] local_request = new byte[1024]; byte[] remote_reply = new byte[1024]; while (true) { try { //-------------------------------------- //监听MediaPlayer的请求，MediaPlayer->代理服务器 //-------------------------------------- localSocket = localServer.accept(); Log.e(TAG, "..........localSocket connected.........."); in_localSocket = localSocket.getInputStream(); out_localSocket = localSocket.getOutputStream(); Log.e(TAG, "..........init local Socket I/O.........."); String buffer = "";//保存MediaPlayer的HTTP请求 while ((bytes_read = in_localSocket.read(local_request)) != -1) { String str = new String(local_request); Log.e("localSocket---->", str); buffer = buffer + str; if (buffer.contains("GET") && buffer.contains("\r\n\r\n")) { // ---把request中的本地ip改为远程ip---// buffer = buffer.replace(LOCAL_IP_ADDRESS,remoteHost); break; } } Log.e(TAG, "..........local finish receive.........."); //-------------------------------------- //把MediaPlayer的请求发到网络服务器，代理服务器->网络服务器 //-------------------------------------- remoteSocket = new Socket(); remoteSocket.connect(address); Log.e(TAG,"..........remote Server connected.........."); in_remoteSocket = remoteSocket.getInputStream(); out_remoteSocket = remoteSocket.getOutputStream(); out_remoteSocket.write(buffer.getBytes());//发送MediaPlayer的请求 out_remoteSocket.flush(); //------------------------------------------------------ //把网络服务器的反馈发到MediaPlayer，网络服务器->代理服务器->MediaPlayer //------------------------------------------------------ Log.e(TAG,"..........remote start to receive.........."); while ((bytes_read = in_remoteSocket.read(remote_reply)) != -1) { out_localSocket.write(remote_reply, 0, bytes_read); out_localSocket.flush(); } Log.e(TAG, "..........over.........."); finishListener.onFinishListener();//释放资源 } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }.start(); }} 再分享一下我老师大神的人工智能教程吧。零基础！通俗易懂！风趣幽默！还带黄段子！希望你也加入到我们人工智能的队伍中来！https://blog.csdn.net/jiangjunshow