(Appcelerator Titanium) How to search all files on device's memories with given file name and display them in an OptionDialog?

Destination: iOS x.x, Android x.x Device: physical devices

I've already searched for similar questions, but I've only found some ones that point to this link: http://developer.appcelerator.com/question/160170/android---how-to-search-for-all-files-on-sd-card-with-given-file-extensions-and-display-them-in-an-optiondialog, that is not very clear and has not an explained code script example.

I'm asking for A CODE EXAMPLE that permits me to search a specific file name in ALL smart phone's memories (internal memory and SD card, if present). Then display all the found items on a OptionDialog.

Thanks in advance for your time.