Fix the submenu in java

I am looking for a freelancer who are expert in Java. I have a problem with adding the submenu under the subheader called "Folder". I want to add the submenu when I create a new folder and set the submenu items in the alphabetical order. If you can do this for $30 that would be great. When you are done please send me the apk demo so I will check. No timewasters please. Thanks for your interest