Can ZXing be used in Android with encrypted QR-codes?

Question

The current method uses AES encrypted files. The goal is to exchange small amounts of private data using AES encrypted QR-codes.

Answer 1

There's no such thing as an encrypted QR code as far the spec is concerned. In that sense, no.

However you can in theory put whatever bytes you want in a QR code. Those bytes could happen to be the encrypted version of some data. It would not make sense to most readers as it is a custom, non-standard use of QR codes.

But you can easily modify an encoder/decoder to do this on Android, yes.