Android Biometrics

Define
Physiological
VS
Behavioral

Verification (one-to-one)
Identification (one-to-many)

Innovate

Do mistakes

Investigate

Draw

Deploy
Gradle:
dependencies {
implementation "androidx.biometric:biometric:1.0.1"
}

Deploy
private lateinit var executor: Executor
private lateinit var biometricPrompt: BiometricPrompt
private lateinit 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()
}
)

Deploy
promptInfo = BiometricPrompt.PromptInfo.Builder()
.setTitle("Biometric login for my app")
.setSubtitle("Log in using your biometric credential")
.setNegativeButtonText("Use account password")
.build()

Deploy
// Allows user to authenticate using their lock screen
// PIN, 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()

Deploy
// Allows user to authenticate using their lock screen
// PIN, 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()

Enjoy
Cryptographic solution that depends on authentication
Authenticate using only biometric credentials
Authenticate using either biometric or lock screen credentials
Authenticate without explicit user action

Update
Android 6
Android 8
Android 9
Android 10