Password storage with fingerprint authorization

[l00k]

This is simplest implementation of fingerprint authorization I could find. If device is locked with password, after first enter in app user can store it encrypted with Android fingerprint authorization module. Each next time he can use fingerprint to unlock device.

Note: I'm not pro Android developer, I found examples about implementing fingerprint authorization and merged it with your app code. It is probably not good idea to merge it as it is. But may be helpful while working on your implementation.