bioprompt2.kt

var biometricPrompt = BiometricPrompt(this, executor, object : BiometricPrompt.AuthenticationCallback() {
  override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
      super.onAuthenticationError(errorCode, errString)
      // Error 
  }

  override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
      super.onAuthenticationSucceeded(result)
      // Success
  }

  override fun onAuthenticationFailed() {
      super.onAuthenticationFailed()
      // Failed
  }
})