How to hide the browser which is opened by Intent.ACTION_VIEW

Question

I am trying to download a pdf file from my app.

I've tried two methods:

webView.loadUrl(uriPath);
webView.setDownloadListener(new DownloadListener()
{
    @Override
    public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) 
    {
        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
    }
});

and next

Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(uriPath));
startActivity(i);

Both of these methods are using Intent.ACTION_VIEW

End of the day my file is downloaded but before downloading it is showing the web browser, loading the page, then coming back to my app, giving a Toast Downloading

I want to hide the browser, there are questions to hide the url on browser but not to hide the browser.

I found an unanswered question Here

Kindly suggest me how to do this task. Thank you.

Edit: Structure of my activity

public class Pdf extends Activity
{
  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
     new Displays().execute();
  }

  private class Displays extends AsyncTask<String, Void, Void>
  {
    @Override
    protected Void doInBackground(String... params)
    {
       //retrieving the list of pdf documents url.
    }

    @Override
    protected void onPostExecute(Void aVoid)
    {
       text = new TextView(getApplicationContext());
       text.setText(list1.get(i));
       text.setOnClickListener(...)
       {
         //here download the selected pdf
//if am am calling any async class or any method from here file is not getting downloaded.What to do :(
       }
    }
  }
}