Upload file from android to server using OkHttp and PHP -

i make android uploader pand php script. can not upload csv file android local folder.

php sclipt can work alone.

error undefined index:upfile in /example/html/php/ uploadfile.php online 9

do not choice file

public class mainactivity extends activity {  textview outputtext; button senddata; edittext edtuser, edtpass; final string url = "http://example/php/uploadfile.php";   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      outputtext = (textview) findviewbyid(r.id.textview1);     outputtext.setmovementmethod(new scrollingmovementmethod());     senddata = (button) findviewbyid(r.id.button1);     edtuser = (edittext) findviewbyid(r.id.edittext1);     edtpass = (edittext) findviewbyid(r.id.edittext2);      string text = "tue oct 06 18:56:24 jst 2015,tue oct 06 18:57:12 jst 2015,35.4708118,139.6251623\n";      try {         outputstream out = openfileoutput("gps_log2.csv", mode_append);         printwriter writer =                 new printwriter(new outputstreamwriter(out, "utf-8"));         writer.append(text);         writer.close();     } catch (ioexception e) {         e.printstacktrace();     }      senddata.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {              okhttphandler handler = new okhttphandler();              string result = null;              try {                 result = handler.execute(url).get();             } catch (interruptedexception e) {                 e.printstacktrace();             } catch (executionexception e) {                 e.printstacktrace();             }             outputtext.append(result + "\n");         }     });   } }   public class okhttphandler extends asynctask<string, void, string> {  public static final mediatype media_type_csv         = mediatype.parse("text/csv; charset=utf-8");  okhttpclient client = new okhttpclient();  public okhttphandler(){  }  @override protected string doinbackground(string........params){      string filename = "gps_log2.csv";     log.d("doinbackground", "start");      request request = new request.builder()             .url("http://160.16.84.183/php/uploadfile.php")             .post(requestbody.create(media_type_csv,filename))             .build();      try{         response response = client.newcall(request).execute();         if(!response.issuccessful())             throw new ioexception("unexpected code " + response.tostring());         return response.body().string();      }catch(exception e){         e.printstacktrace();         log.d("response ",e.getmessage());      }     return null;  }  if (is_uploaded_file($_files["upfile"]["tmp_name"])) { if (move_uploaded_file($_files["upfile"]["tmp_name"], "/var/www/html/php/" . $_files["upfile"]["name"])) { chmod("/var/www/html/php/" . $_files["upfile"]["name"], 0644); echo $_files["upfile"]["name"] . "file uploaded"; } else { echo "cannot file upload"; } } else { echo "do not choice file"; } 

aine , trying write file @ /var/www/html/php/. not best practice write files location . move loaction of script /home , change path etc/apache/siteenabled . more details  http://askubuntu.com/questions/379412/how-to-redirect-apache-var-www-to-the-home-directory-and-access-all-the-directo php code must follows  public static function processrequest() {     case 'post':        if(move_uploaded_file($_files["uploaded_file"]["tmp_name"] , "images/" . $_files["uploaded_file"]["name"] )){                     echo "move_uploaded_file success ";     ......................................                 } ......................................            protected function executepost ($ch) {     $tmpfile = $_files['image1']['tmp_name'];     $filename = basename($_files['image1']['name']);      $data = array(         'uploaded_file' => '@' . $tmpfile . ';filename='.$filename,     );     curl_setopt($ch, curlopt_post, 1);                  curl_setopt($ch, curlopt_postfields, $data);      //no need httpheaders     $this->doexecute($ch);  }