[Q] synchronize a file using usb

Hi,
I'm developping an android application that need a file generated from a web application. the problem is that this application is for a hospital where we can not use wifi to download this generated file (xml) directly from the web application.

Thats why I'm searching for another meathod to synchronize the file and to transfert it to the tablet.

Could you give me some propositions ?
Is there some open source application to synchronize a pc folder with a tablet forder throught MTP protocol ?

is there any good java library ?

I found two libraries but :

jMTP successfully recognizes my Android devices but as of this writing there is no support for file transfer of any kind. All I've managed to do is go through the file system.

jusbpmp is supposed to be able to but its awfully buggy and fails to recognize some of the devices I'm trying to develop for.


Thank you,