Create a simple Android Order Taking App Post Existing Only

This Project is to run on an Android Device (especially S3 / S4) device. I require a simple order taking application. The user will specify a customer (or look up a config file) and then allow the operator to scan a barcode, check into a simple database and allow the order entry process by reading barcodes. Quantities will be suggested based on the underlying data file and other parameters listed. This project is to port an app already developed specifically for Blackberry to Android that has been developed.