httpserver - android and sending files to HTTP server -

i try write application send file http server. here android-side code:

public void send(view view) {     httpurlconnection connection = null;     dataoutputstream outputstream = null;     datainputstream inputstream = null;      string pathtoourfile = "/data/file.txt";     string urlserver = "http://localhost/zad1.php";     string lineend = "\r\n";     string twohyphens = "--";     string boundary =  "*****";      int bytesread, bytesavailable, buffersize;     byte[] buffer;     int maxbuffersize = 1*1024*1024;      try     {         fileinputstream fileinputstream = new fileinputstream(new file(pathtoourfile) );          url url = new url(urlserver);         connection = (httpurlconnection) url.openconnection();          // allow inputs & outputs         connection.setdoinput(true);         connection.setdooutput(true);         connection.setusecaches(false);          // enable post method         connection.setrequestmethod("post");          connection.setrequestproperty("connection", "keep-alive");         connection.setrequestproperty("content-type", "multipart/form-data;boundary="+boundary);          outputstream = new dataoutputstream( connection.getoutputstream() );         outputstream.writebytes(twohyphens + boundary + lineend);         outputstream.writebytes("content-disposition: form-data; name=\"uploadedfile\";filename=\"" + pathtoourfile +"\"" + lineend);         outputstream.writebytes(lineend);          bytesavailable = fileinputstream.available();         buffersize = math.min(bytesavailable, maxbuffersize);         buffer = new byte[buffersize];          // read file         bytesread = fileinputstream.read(buffer, 0, buffersize);          while (bytesread > 0)         {             outputstream.write(buffer, 0, buffersize);             bytesavailable = fileinputstream.available();             buffersize = math.min(bytesavailable, maxbuffersize);             bytesread = fileinputstream.read(buffer, 0, buffersize);         }          outputstream.writebytes(lineend);         outputstream.writebytes(twohyphens + boundary + twohyphens + lineend);          // responses server (code , message)         int serverresponsecode = connection.getresponsecode();         string serverresponsemessage = connection.getresponsemessage();          fileinputstream.close();         outputstream.flush();         outputstream.close();          log.i("odpowiedz", serverresponsemessage);     }     catch (exception ex)     {         log.i("wyjatek", ex.getmessage());     } } 

}

and here php script

<?php     $target_path  = "./";     $target_path = $target_path . basename( $_files['uploadedfile']['name']);      if(move_uploaded_file($_files['uploadedfile']['tmp_name'], $target_path)) {         echo "the file ".  basename( $_files['uploadedfile']['name'])." has been uploaded";     }      else {         echo "there error uploading file, please try again!";     } ?> 

my problem when try send file server "localhost/127.0.0.1:80 - connection refused" exception. of know doing wrong? every , tip.

use import org.apache.http.entity.mime.multipartentity;