If both are available, does Android BiometricManager default to Face Recognition or Fingerprint?

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I do not have a device to test this scenario with, but I have seen a lot of people complaining that when both Face Recognition and Fingerprint were available on their device, the app decided to use Fingerprint authentication instead.

I have not been able to find any article or documentation that talks about this preference, and I am not sure if those users were using BiometricPrompt vs BiometricManager.

Does anyone know if both are available, does Android BiometricManager/BiometricPrompt default to Face/Iris recognition or Fingerprint? Also is there a way to force one over the other?

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1 Answers

I had a similar kind of requirement, And after my research, I came to know as of now (Android 10) it depends on OEM's implementation to provide either fingerprint or face recognition for app's authentication.

From Android R, there will be a way to get a prompt to choose authentication either fingerprint or facial.

Please have a look at the below issues been raised for a similar requirement.

https://issuetracker.google.com/issues/111315641

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