Determine what type of biometric hardware is available Android

Question

I'm setting up a biometric login using kotlin. I have it working but I would like to switch out which icon is displayed based on the available hardware, ie. show a retinal scanner icon for retinal scanning, fingerprint for fingerprint scanning etc. So far digging through the docs I haven't been able to find a way to determine this and the google machine hasn't been very useful.

something along the lines of

when (biometricManager.biometricType) {
face -> {}
fingerprint -> {}
retinaScanner -> {}
}

would be awesome. Does this exist?

score 2 · Answer 1 · answered Jun 26 '20 at 20:14

I figured it out, you use the package manager.

enum class BiometricType {
            Iris, Fingerprint, Face, None
        }

fun biometricType(context: Context): BiometricType {
        return when {
            context.applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_FACE) -> BiometricType.Face
            context.applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT) -> BiometricType.Fingerprint
            context.applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_IRIS) -> BiometricType.Iris
            else -> BiometricType.None
        }
    }

Hopefully this helps someone else out in the future

Determine what type of biometric hardware is available Android

1 Answers1