BiometricPrompt iris and face prompt is not working with Crypto object authentication. #AndroidX

Question

Issue

• Biometric authentication iris and face-detection is not prompting with biometricPrompt.authenticate(**crypto**, promptInfo)

Answer 1

Some devices only have one form factor, some have many form factors. Which form factor your app ends up using isn't really up to you; it's up to the OEM implementation. As explained in this blog post, whether a form factor is Strong or Weak doesn't depend on your code -- the OEM decides. However, you can request that a device uses Strong authentication for your app by specifying a CryptoObject when you call authenticate().

What you are experiencing is that the OEMs of your devices decided to make Fingerprint the default for Strong biometrics. Therefore, when you pass in a CryptoObject to authenticate() those devices show the user the UI for Fingerprint.