+ // Add a Download URL entry.
+ menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
+ // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
+ if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
+ // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
+
+ // Store the variables for future use by `onRequestPermissionsResult()`.
+ downloadUrl = linkUrl;
+ downloadContentDisposition = "none";
+ downloadContentLength = -1;
+
+ // Show a dialog if the user has previously denied the permission.
+ if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) { // Show a dialog explaining the request first.
+ // Get a handle for the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
+ DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
+
+ // Show the download location permission alert dialog. The permission will be requested when the the dialog is closed.
+ downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
+ } else { // Show the permission request directly.
+ // Request the permission. The download dialog will be launched by `onRequestPermissionResult()`.
+ ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+ }
+ } else { // The WRITE_EXTERNAL_STORAGE permission has already been granted.
+ // Get a handle for the download file alert dialog.
+ AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
+
+ // Show the download file alert dialog.
+ downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+ }
+ return false;
+ });
+