如何使用Java将文件从服务器快速传输到Android手机？

Question

I'm building an Android app that requires some files sent to it from our server. I've implemented both the Server Socket in Java and the Android socket client and tested it, but the transfer is too slow.

FILE SIZE: 5 MB
TRANSFER TIME: 15.3 seconds

So the server is set up on my own PC, I use port forwarding so I can be able to connect to it from any network. If you think it's relevant, here is a speed test of my network: http://www.speedtest.net/my-result/3965566858

Now the server code:

BufferedInputStream musicData = new BufferedInputStream(new FileInputStream(new File("fileSrc")));

byte[] data = new byte[8192];
int count = 0;

while ((count = musicData.read(data)) > 0) {
  outStreamMusic.write(data, 0, count);
}

Client code:

InputStream inStream = socketClient.getInputStream();
byte[] data = new byte[8192];
int count = 0;

while ((count = inStream.read(data)) > 0) {
      tempFile.write(data, 0, count);
}

So this will open the file, parse it and send bytes until there's nothing else to send. I'm pretty sure this can be done faster but I have no idea how. The Android client just opens a socket to my ip/port and reads data from it. Any idea how to make this faster?

Answer 1

IF you want your android device to read data from a server, its best done using the android AsynTask and implement the doInBackground method. This way you can establish a connection to your server using HttpClient of the org.apache library and issue a request and receive a response in which your can read it through from an inputStream.

public String doInBackground()
{
  DefaultHttpClient httpClient = new DefaultHttpClient();
  HttpGet httpGet = new HttpGet("www.yourserverip.com");
  HttpResponse response = httpClient.execute(httpGet);
  HttpEntity entity = response.getEntity();
  BufferReader reader = new BufferReader(new InputStreamReader(entity.getContent()));'
  while(reader.readLine!=null)
  {
    //Read Something    
    //read Your data  
  }
 /*Note this is just a basic use of httpClient*/
 /*Also if its a file you really might not use the bufferedReader*/
}

First Of all I really hope i understand your question and what you really want to achieve.