[android-developers] scanDirectories() using MediaScanner when media files are deleted like BlueTooth?

Dear.
If media files are deleted using the BlueTooth, how should I handle
it?
Should scanDirectories() be called?
In the case that new media files are transferred via BT, scanFile()
is called.
But if media files are deleted, what should be done?
Please let me know the process.

Thanks.
BR.