QR code scan and automatic generate QR code information list Android app

General information for the app: inhouse app for internal process
Kind of development: New app from scratch
Num. of web pages/modules: 2
Description of every page/module: The app shall scan barcodes/QR codes, put it in a list and visualise this list. It shall help to simplify some sample processing steps in our sample laboratory.
Description of requirements/features: 1 The app should be able to scan barcodes/QR codes writes the code information into a defined spreadsheet (csv or better a Google drive sheet).
2 Each approved scan will get a defined number assigned based on a provided layout
3 The layout is a matrix of 48 or 96 positions or cells
1 2 3 4 5 6 7 8 9 10 11
A o o o o o o o o o o o
B o o o o o o o o o o o
etc

Each cell shall be visualised whether it is filled by the scan or not. Potentially also clickable/touchable to see the codes number.

Extra notes:
There is no design available at this moment. I expect you to use a minimalistic Android Material Design.