Read files from any folders in mobile device

Hi ,

I have a requirement , User will upload one text file(which periodically updates by user) to any folder (We can tell them to use particular folder mostly bluetooth folder) say "sample.txt" and my android app should read the master file and process...

Whether user can upload files to Asset folder of app directly or is there a way to read the file(absolute path for sample.txt) which is placed anywhere in the mobile.

Please advise..

Thanks in advance...