Download file android

FileDownloadRetrieve.java

class FileDownloader{
        

       
public static void image_download(Context context, String uRl, String bookNmae) {

        File direct = new File(Environment.getExternalStorageDirectory()
                + "/appFolderName/images");
        String imageName = uRl.substring(uRl.lastIndexOf('/') + 1, uRl.length());

        if (!direct.exists()) {
            direct.mkdirs();
        }

        DownloadManager mgr = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);

        Uri downloadUri = Uri.parse(uRl);
        DownloadManager.Request request = new DownloadManager.Request(
                downloadUri);

        request.setAllowedNetworkTypes(
                DownloadManager.Request.NETWORK_WIFI
                        | DownloadManager.Request.NETWORK_MOBILE)
                .setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN)
                .setAllowedOverRoaming(false).setTitle("thumbnail")
                .setDestinationInExternalPublicDir("/eBoiMela/images", bookNmae + ".jpg");

        mgr.enqueue(request);

    }
        
     // File folder = new File(Environment.getExternalStorageDirectory(), "/folderName");  
         public static void searchFolderRecursiveForPDF(File folder) {
        if (folder != null) {
            if (folder.listFiles() != null) {
                for (File file : folder.listFiles()) {
                    if (file.isFile()) {
                        //.pdf files
                        if ((file.getName().contains(".pdf")) || file.getName().contains(".PDF")) {
                            // Log.e("ooooooooooooo", "path__="+file.getName());
                            file.getPath();
                            //two list to hold name and path
                            pdf_file_name.add(file.getName());
                            pdf_file_path.add(file.getPath());
                            StaticVariable.file_path.add(file);
                            // Log.e("pdf_paths", "" + pdf_names);
                        }
                    } else {
                        searchFolderRecursiveForPDF(file);
                    }
                }
            }
        }
    }
}