Hi am Fresher in android . am creating a app which i need to upload captured image and JSON data which i got from QRcode to PHP server. But am getting Secret_key not matched message when i debug. 

I Checked API from postman the server is responding with the file path which i uploaded. but from code am getting secret key not match. please help guys.

this is my code

private class uploadFileToServerTask extends AsyncTask <String, String, Object> {
   private DataOutputStream outputStream;;
    @Override
    protected String doInBackground(String... args) {
        try {
            String lineEnd = "\r\n";
            String twoHyphens = "--";
            String boundary = "*****";
            int bytesRead, bytesAvailable, bufferSize;
            byte[] buffer;
            @SuppressWarnings("PointlessArithmeticExpression")
            int maxBufferSize = 1 * 1024 * 1024;
            String result = "";
            String filename = args[0];


            java.net.URL url = new URL( ApplicationConstant.BASE_URL );
            Log.d( ApplicationConstant.TAG, "url " + url );
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();


      // Allow Inputs &amp; Outputs.
            connection.setDoInput( true );
            connection.setDoOutput( true );
            connection.setUseCaches( false );

            // Set HTTP method to POST.
            connection.setRequestMethod( "POST" );
            connection.setRequestProperty( "Connection", "Keep-Alive" );
            connection.setRequestProperty( "Content-Type", "multipart/form-data;boundary=" + boundary );
            connection.setRequestProperty( "secret_key", ApplicationConstant.secret_key);
        
            outputStream= new DataOutputStream( connection.getOutputStream() );

            FileInputStream fileInputStream;

            {
                outputStream.writeBytes( twoHyphens + boundary + lineEnd );
                outputStream.writeBytes( "Content-Disposition: form-data; name=\"file\";filename=\"" + filename + "\"" + lineEnd );
                outputStream.writeBytes( lineEnd );
                outputStream.writeBytes( twoHyphens + boundary + lineEnd );
                //outputStream.writeBytes( query );
                Log.d( ApplicationConstant.TAG, "filename " + filename );


                fileInputStream = new FileInputStream( filename );

                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min( bytesAvailable, maxBufferSize );

                buffer = new byte[bufferSize];

                // Read file
               // bytesRead = fileInputStream.read( buffer, 0, bufferSize );

                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 );
            }

            int serverResponseCode = connection.getResponseCode();
            String serverResponseMessage = connection.getResponseMessage();
            Log.d( "serverResponseCode", "" + serverResponseCode );
            Log.d( "serverResponseMessage", "" + serverResponseMessage );

            //Response from server
            String response = "";
            if (serverResponseCode == HttpURLConnection.HTTP_OK) {
                InputStream responseStream = new
                        BufferedInputStream( connection.getInputStream() );

                BufferedReader responseStreamReader =
                        new BufferedReader( new InputStreamReader( responseStream ) );

                String line = "";
                StringBuilder stringBuilder = new StringBuilder();

                while ((line = responseStreamReader.readLine()) != null) {
                    stringBuilder.append( line ).append( "\n" );
                }
                responseStreamReader.close();

                response = stringBuilder.toString();
                connection.disconnect();
                fileInputStream.close();
                outputStream.flush();
                outputStream.close();

                if (serverResponseCode == 200) {

                    return "true";
                }
            } else {
                throw new IOException( "Server returned non-OK status: " + serverResponseCode );
            }

            return response;
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        } catch (ProtocolException e1) {
            e1.printStackTrace();
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }catch(
                Exception e)

        {
            e.printStackTrace();
        }
        return"false";
    }