A:
I use Movie Collector from collectorz.com for exactly this purpose. Create the database on your desktop or laptop first. The desktop app even accepts input from a laser barcode scanner so that all you have to do is scan the barcodes of each DVD/BluRay and it will look up the movie for you.
Once you have done that, you can use an android app that collectorz.com created, on your Tablet to search the database. They make it fairly easy to transfer a copy of your database to the tablet.
Optionally, you can purchase the USB thumbdrive host and just put your database on the thumbdrive, connnecting it to your tablet as needed.