Android progress bar for file upload is showing only 0 and 100

Question

Hi i want to display file upload progress in a progress dialog to the user but the progress dialog is showing only 0% and 100% ( Not displaying the actual progress). I'm using retrofit for file upload and using counting file.

This is the code i am using:

 new AsyncTask<String, Integer, Void>()
        {
            private ProgressListener listener;
            private long totalSizeValue;
            private ProgressDialog pDialog;

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                pDialog = new ProgressDialog(ManualAdd.this);
                pDialog.setMessage("Uploading...");
                pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                pDialog.setCancelable(false);
                pDialog.show();
            }

            @Override
            protected Void doInBackground(String... params) {

                String realPath = MediaUtils.getRealPathFromURI(fileURI, ManualAdd.this);
                File file = new File(realPath);
                totalSizeValue = file.length();
                final String filename = MediaUtils.getFileName(fileURI, ManualAdd.this);


                listener = new ProgressListener() {
                    @Override
                    public void transferred(long num) {

                        publishProgress((int)(((float)num*100f)/(float)totalSizeValue));

                    }
                };



                final Attachment attachment = new Attachment();
                attachment.setFileUri(fileURI);

                final String filePath = realPath;

                FileUploadService service = ServiceGenerator.createService(FileUploadService.class, FileUploadService.BASE_URL,Activityname);

                Map<String,String> path = new HashMap<>();
                path.put("path","fileUpload");

                service.upload(path,new CountingTypedFile("image/"+MediaUtils.getFileExt(filename),file,listener), new Callback<Pk_Response>() {
                    @Override
                    public void success(Pk_Response pk_response, retrofit.client.Response response) {
// Success logic
                        pDialog.dismiss();
                    }
                    @Override
                    public void failure(RetrofitError error) {
                        Toast.makeText(activity,"Failed to upload attachments...",Toast.LENGTH_LONG).show();
                        pDialog.dismiss();
                    }
                });

                return null;
            }

            protected void onProgressUpdate(Integer... progress) {               
                pDialog.setProgress(progress[0]);
            }
        }.execute();

Please help me, Thanks in advance

EDIT: changed the publish progress math equation:

publishProgress((int) ((num / (float) totalSizeValue) * 100));