Android Biometrics

var promptInfo: BiometricPrompt.PromptInfo

override fun onCreate(savedInstanceState: Bundle?) {
...

executor = ContextCompat.getMainExecutor(this)
biometricPrompt = BiometricPrompt(this, executor,
object : BiometricPrompt.AuthenticationCallback() {
override fun onAuthenticationError(errorCode: Int,errString: CharSequence)
override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult)
override fun onAuthenticationFailed()
}
)

.setTitle("Biometric login for my app")

.setSubtitle("Log in using your biometric credential")
.setNegativeButtonText("Use account password")
.build()

pattern, or password.
promptInfo = BiometricPrompt.PromptInfo.Builder()
.setTitle("Biometric login

for my app")
.setSubtitle("Log in using your biometric credential")
// Cannot call setNegativeButtonText() and
// setDeviceCredentialAllowed() at the same time.
// .setNegativeButtonText("Use account password")
.setDeviceCredentialAllowed(true)
.build()

pattern, or password.
promptInfo = BiometricPrompt.PromptInfo.Builder()
.setTitle("Biometric login

for my app")
.setSubtitle("Log in using your biometric credential")
// Cannot call setNegativeButtonText() and
// setDeviceCredentialAllowed() at the same time.
// .setNegativeButtonText("Use account password")
.setDeviceCredentialAllowed(true)
.build()

using either biometric or lock screen credentials
Authenticate without explicit user

action