android upc barcode scanning app to store items in a collection

I need an app that will run on the android platform(G1) and scan barcodes of either books or DVDs and store them in a database. I need t ohave it be able to view all records or sort data and be able to rescan a barcode and check? to see if it is already in the database.? I also want to be able to create? a want list and be able t oscan the upc code and create links to buy item amazon store using my affliate code.