How Android downloads files via the socket _android

This example describes how Android downloads files via the socket. Share to everyone for your reference, specific as follows:

Service-side code

Import Java.io.BufferedInputStream;
Import Java.io.DataInputStream;
Import Java.io.DataOutputStream;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.net.ServerSocket;
Import Java.net.Socket;
Import Java.util.Scanner;
 public class Functionserver {private static int PORT = 2012;
 Private String Path = "path where files need to be downloaded";
  public static void Main (string[] args) throws ioexception{functionserver server = new Functionserver ();
 Server.start ();
  The public void start () throws ioexception{ServerSocket ss = new ServerSocket (PORT);
   while (true) {Socket s = ss.accept ();
  New service (s). Start ()///Create Thread} class Service extends thread{Socket s;
  The public Service (Socket s) {this.s = s;
    The public void Run () {try{InputStream in = S.getinputstream ();//Gets the input stream Scanner sc = new Scanner (in);
    OutputStream out = S.getoutputstream (); while (true) {String str = sc.Nextline ()///Read file name if (!str.equals (null)) {SYSTEM.OUT.PRINTLN ("Your filename is" +str);
      Gets the file, based on the path and file name (PATH+STR);
      FileInputStream fis = new FileInputStream (f);
      DataInputStream dis = new DataInputStream (new Bufferedinputstream (FIS));
      byte[] buffer = new byte[8192];
      DataOutputStream PS = new DataOutputStream (out);
      Ps.writelong ((Long) f.length ());//Send File size Ps.flush ();
       while (true) {int read = 0;
       if (dis!=null) {read = Fis.read (buffer);
       } if (read = = 1) {break;
      } ps.write (Buffer,0,read);
      } ps.flush ();
      Dis.close ();
      S.close ();
      Out.flush ();
     Break
   }}catch (IOException e) {e.printstacktrace ();

 }
  }
 }
}

Client code, download thread

Class Downloadthread extends Thread {socket socket;
  InputStream in;
  OutputStream out;
  String Path = "File save path";
  String functionname;
  String ServerIP = "Server IP";
  int socketport = "service port number";
  int filesize,downloadfilesize;
  Public Downloadthread (String functionname) {this.functionname = functionname;
   @Override public void Run () {looper.prepare (); while (!
     Thread.interrupted ()) {try {socket = new socket (ServerIP, socketport);
     InputStream in = Socket.getinputstream ();
     OutputStream out = Socket.getoutputstream ();
     Out.write ((functionname + "\ n"). GetBytes ("GBK")); Out.flush ();
     Clears the buffer to ensure that it is sent to the server file F = new file (path + functionname);
     OutputStream song = new FileOutputStream (f);
     DataInputStream dis = new DataInputStream (new Bufferedinputstream (in));
     DataOutputStream dos = new DataOutputStream (new Bufferedoutputstream (song));
     fileSize = (int) Dis.readlong ()-1;
 System.out.println ("Start downloading");    byte[] buffer = new byte[8192];
      while (true) {int read = 0;
       if (dis!= null) {read = Dis.read (buffer);
        Downloadfilesize + = read;
      } if (read = = 1) {break;
     } dos.write (buffer, 0, read);
     } System.out.println ("File download Complete");
    Dos.close ();
    catch (Unknownhostexception e) {//TODO auto-generated catch block E.printstacktrace ();
    catch (IOException e) {//TODO auto-generated catch block E.printstacktrace ();
    finally {this.interrupt ();

 }
   }
  }
 }

Basic can be used directly, according to their need to change a little bit OK

I hope this article will help you with the Android program.