android - cannot send data to database of web server -

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when directly go link of php browser, creates empty record in database. however, when send data using app, fails.

java:

protected string doinbackground(string... params) {     string reg_url = "http://www.minigameserver.square7.ch/register.php";     string user_name = params[0];     string user_ac = params[1];     string user_pw = params[2];     try {         url url = new url(reg_url);         httpurlconnection httpurlconnection = (httpurlconnection) url.openconnection();         httpurlconnection.setrequestmethod("post");          httpurlconnection.setdooutput(true);         outputstream os = httpurlconnection.getoutputstream();         bufferedwriter bufferedwriter = new bufferedwriter(new outputstreamwriter(os,"utf-8"));         string data = urlencoder.encode("user_name","utf-8")+"="+urlencoder.encode(user_name,"utf-8")+"&"+                 urlencoder.encode("user_ac","utf-8")+"="+urlencoder.encode(user_ac,"utf-8")+"&"+                 urlencoder.encode("user_pw","utf-8")+"="+urlencoder.encode(user_pw,"utf-8");         bufferedwriter.write(data);         bufferedwriter.flush();         bufferedwriter.close();         os.close();          httpurlconnection.disconnect();          return "done!";     } catch (malformedurlexception e) {         e.printstacktrace();     } catch (ioexception e) {         e.printstacktrace();     }     return "fail!"; }

when run app, massage "done!" shown.

so, there no exception happening. but, why there no new record?

i saw have tired register username of teset. mind tell did can trace post.

when try code provided arshak. following error comes out. e/surface: getslotfrombufferlocked: unknown buffer: 0x7f7d9eaad530

register.php:

<?php require "db_connect.php";  $user_name = $_post["user_name"]; $user_ac = $_post["user_ac"]; $user_pw = $_post["user_pw"]; $user_pw_enc = md5($user_pw);  $sql = "insert user(user_name, user_ac, user_pw) values ('$user_name', '$user_ac', '$user_pw_enc')";  $sql2 = "select * user user_name = '$user_name'"; $result2 = $conn->query($sql2);  $sql3 = "select * user user_ac = '$user_ac'"; $result3 = $conn->query($sql3);  if($result2->num_rows == 0 && $result3->num_rows == 0){ if ($conn->query($sql) === true)         echo "your account created successfully!\nyou can login now!"; else     echo "error: " . $sql . "<br>" . $conn->error; } else { if($result2->num_rows > 0)       echo "the user name used!<br>"; if($result3->num_rows > 0)     echo "the user account used!<br>"; }  ?>

i have updated code, see if data gets inserted:

protected string doinbackground(string... params) { string reg_url = "http://www.minigameserver.square7.ch/register.php"; string user_name = params[0]; string user_ac = params[1]; string user_pw = params[2]; try {         url url = new url(reg_url);         httpurlconnection httpurlconnection = (httpurlconnection) url.openconnection();         httpurlconnection.setrequestmethod("post");         httpurlconnection.setdooutput(true);         httpurlconnection.setdoinput(true);         httpurlconnection.connect();         dataoutputstream os = new dataoutputstream(httpurlconnection.getoutputstream());         string data = urlencoder.encode("user_name","utf-8")+"="+urlencoder.encode(user_name,"utf-8")+"&"+                 urlencoder.encode("user_ac","utf-8")+"="+urlencoder.encode(user_ac,"utf-8")+"&"+                 urlencoder.encode("user_pw","utf-8")+"="+ urlencoder.encode(user_pw,"utf-8");         os .writebytes(data);         os .flush();         os.close();          int responsecode=httpurlconnection.getresponsecode();         string messagefromserver;         if (responsecode==200) {             messagefromserver=frominputstream(httpurlconnection.getinputstream());             log.v("registrationmessage ",messagefromserver);             httpurlconnection.disconnect();             return messagefromserver;         }          httpurlconnection.disconnect();      } catch (ioexception e) {         e.printstacktrace();     }     return "fail!"; }  //add method inside asynctask public string frominputstream(inputstream stream) throws ioexception {         inputstreamreader streamreader = new                 inputstreamreader(stream);         bufferedreader bufferedreader = new bufferedreader(streamreader);         stringbuilder builder = new stringbuilder();         string tempstring = "";         while ((tempstring = bufferedreader.readline()) != null) {             builder.append(tempstring);         }         return builder.tostring();     }

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