[Android] File sort, delete, folder create

Sort:

File[] files = XMLDirectory.listFiles(filter_xml_files);
Arrays.sort(files);

//Arrays.sort(files, Collections.reverseOrder());  //resort
for(File _xml_file : files) {
    ... 
} 

reference: http://stackoverflow.com/questions/7199911/how-to-file-listfiles-in-alphabetical-order


Delete:

File file = new File(selectedFilePath);
boolean deleted = file.delete();

reference: http://stackoverflow.com/questions/1248292/how-to-delete-a-file-from-sd-card


Folder create:

   java.io.File file = new java.io.File(save_path);
   /* if the folder is not exist, create it */
   if (!file.exists())
    file.mkdirs();