protected void onPostExecute(JSONObject json) {
      int success;
      String mensaje;
      byte[] imageByteArray = null;

      try {
        success = json.getInt(Constantes.JSON_SUCCESS);
        mensaje = json.getString(Constantes.JSON_MESSAGE);

        if (success == 1) { // si fue bien

          JSONObject jsoncomment = json.getJSONObject("comment");

          String imagepath =
              getActivity().getFilesDir() + "/images/" + Constantes.IMAGEN_PERFIL_FILENAME;
          File imagefile = new File(imagepath);

          if (imagefile.exists()) {

            Bitmap bitmap = BitmapFactory.decodeFile(imagepath);
            bitmap =
                Utilidades.redimensionarBitmap(
                    bitmap, Constantes.THUMB_SIZE, Constantes.THUMB_SIZE);
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
            imageByteArray = stream.toByteArray();
          }

          Comment comment =
              new Comment(
                  imageByteArray,
                  jsoncomment.getString("msg"),
                  jsoncomment.getString("username"),
                  jsoncomment.getString("timestamp"),
                  Utilidades.getDevId(getActivity()),
                  jsoncomment.getString("id"));
          addCommentToList(comment);
          commentsadapter.notifyDataSetChanged();
          etCommentTxt.setText(""); // borramos el edittext

        } else {
          Toast.makeText(getActivity(), mensaje, Toast.LENGTH_LONG).show();
        }
      } catch (JSONException e) {
        e.printStackTrace();
      }

      pDialog.dismiss();
    }