Puedo descargar todo agregando el siguiente código en mi aplicación de Android webview. Pero no puedo descargar el archivo pdf especialmente desde http://www.garmentsmis.com/Efficiency_Calculator.aspx . Cuando hago clic en descargar, se bloquea la aplicación.

 //Runtime External storage permission for saving download files if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) { if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) { Log.d("permission", "permission denied to WRITE_EXTERNAL_STORAGE - requesting it"); String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE}; requestPermissions(permissions, 1); } } //handle downloading web_view.setDownloadListener(new DownloadListener() { @Override public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long contentLength) { DownloadManager.Request request = new DownloadManager.Request( Uri.parse(url)); request.setMimeType(mimeType); String cookies = CookieManager.getInstance().getCookie(url); request.addRequestHeader("cookie", cookies); request.addRequestHeader("User-Agent", userAgent); request.setDescription("Downloading File..."); request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimeType)); request.allowScanningByMediaScanner(); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); request.setDestinationInExternalPublicDir( Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName( url, contentDisposition, mimeType)); DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); dm.enqueue(request); Toast.makeText(getApplicationContext(), "Downloading File. Go to Download folder from File Manager.", Toast.LENGTH_LONG).show(); }});

¿Alguien puede explicarme qué debo hacer? Gracias.