question

When I call an object of the below class my text view is set to "Not Found". I have also set all merchant permissions for my app in the sandbox account to read and write. Please can anyone help?

private class InventoryAsyncTask extends AsyncTask<Void, Void, Item> {

        @Override
        protected final Item doInBackground(Void... params) {
            try {
                //Get inventory item
                Item tmp = mInventoryConnector.getItems().get(0);
                Log.d("Item Value : ", tmp.getName());
                return tmp;

            } catch (RemoteException | ClientException | ServiceException | BindingException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected final void onPostExecute(Item item) {
            if (item != null) {
                mTextView.setText(item.getName());
            }
            else{
                mTextView.setText("Not Found");
            }
        }
    }