listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                                long id) {

            String urlOfFileToDownload = (String) parent.getItemAtPosition(position);
            // Object item = parent.getItemAtPosition(position);

            DownloadManager downloadmanager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
            Uri uri = Uri.parse(urlOfFileToDownload);
            DownloadManager.Request request = new DownloadManager.Request(uri);
            Long reference = downloadmanager.enqueue(request);
        }
    });