FileNotFoundException:downloading attachments

InputStream is;
 String url="https://example.com";
 try{
     URL u = new URL(url);
     HttpURLConnection = (HttpURLConnection) u.openConnection();
     con.setRequestMethod("GET");
     con.setDoOutput(true);
     con.connect();
     int responseCode=con.getResponseCode();
     if(responseCode>=400&&responseCode<=499){
     } else {
        is=con.getInputStream();
        String path=Environment.getExternalStorageDirectory()+"/aproad/";
        String fileName = url.substring(url.lastIndexOf('/')+1);
        File dir = new File (path);
        dir.mkdirs();
        File outputFile=newFile(dir,fileName);
        FileOutputStream fos = new FileOutputStream(outputFile);

        byte [ ] buffer = new byte [1024];
        intlen=0;
        while((len=is.read(buffer))!=-1){
            fos.write(buffer,0,len);
        }
        fos.close();
        is.close();

        image=BitmapFactory.decodeStream(is);
     }
     return image;

}catch(IOExceptione){
     e.printStackTrace();
}

Request request = new Request (Uri.parse(url));
    request.allowScanningByMediaScanner();
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "download");
    request.setVisibleInDownloadsUi(false);
    request.setDescription(contentDisposition);
    downloadManager=(DownloadManager) getSystemService(DOWNLOAD_SERVICE);
    query = new DownloadManager.Query();
    // download flag
    query.setFilterByStatus (DownloadManager.STATUS_FAILED);
    query.setFilterByStatus (DownloadManager.STATUS_SUCCESSFUL);
    downloadid = downloadManager.enqueue(request);

    receiver = new BroadcastReceiver() {
        @ Override
        public void onReceive (Context context, Intent) {
           String action=intent.getAction();
           if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)){

               long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
               Log.d("xxx", "End Download download Id="+id);

               query.setFilterById(id);
               Cursorc=downloadManager.query(query);

               if(c.moveToFirst()){
                   int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS)));
                   int reason=c.getInt(c.getColumnIndex(DownloadManager.COLUMN_REASON)));
                   Log.d("status", Integer.toString(status)));
                   Log.d("reason", Integer.toString(reason));

                   // If the download fails
                   if(status==DownloadManager.STATUS_FAILED){
                       downloadManager.remove(downloadid);

                   // Successful Download
                   } else if(status==DownloadManager.STATUS_SUCCESSFUL){
                    Log.d(", "SECCUSS");
                    try{
                        ParcelFileDescriptor file=
                                downloadManager.openDownloadedFile(downloadid);
                        FileInputStream files=
                                newParcelFileDescriptor.AutoCloseInputStream(file);
                        imageView.setImageBitmap(BitmapFactory.decodeStream(files));
                    } catch(FileNotFoundExceptione){
                        e.printStackTrace();
                    }

                   }
               }
               c.close();

           }
       }
    };
    registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);