Android Studio – stop the indicator after file loads

I am trying to display a file on tap of button. But before the file loads, I want the circular progress indicator to start and after the file loads, I want it to stop. I have implemented the following code but the problem is the indicator keeps on loading even after file loads.

  InkWell(

    onTap: () async {
      player.stop();



         Center(
                  child: CircularProgressIndicator(),
                );

      final files = await loadPdfFromNetwork(file.url);
      openPdf(context, files, file.url,file.name.split('.').first);



    }