blog_cryptoobject_create_promptinfo

class MainActivity : AppCompatActivity() {
  ...
   private lateinit var biometricPrompt: BiometricPrompt
   private lateinit var promptInfo: BiometricPrompt.PromptInfo
   ...

   override fun onCreate(savedInstanceState: Bundle?) {
       super.onCreate(savedInstanceState)
       setContentView(R.layout.activity_main)
       ...
       biometricPrompt = createBiometricPrompt()
       promptInfo = createPromptInfo()
       ...
   }

   ...

   private fun createPromptInfo(): BiometricPrompt.PromptInfo {
       val promptInfo = BiometricPrompt.PromptInfo.Builder()
               // e.g. "Sign in"
               .setTitle(getString(R.string.prompt_info_title))
               // e.g. "Biometric for My App"
               .setSubtitle(getString(R.string.prompt_info_subtitle))
               // e.g. "Confirm biometric to continue"
               .setDescription(getString(R.string.prompt_info_description))
               .setConfirmationRequired(false)
               .setNegativeButtonText(getString(R.string.prompt_info_use_app_password))
               // .setDeviceCredentialAllowed(true) // Allow PIN/pattern/password authentication.
               // Also note that setDeviceCredentialAllowed and setNegativeButtonText are
               // incompatible so that if you uncomment one you must comment out the other
               .build()
       return promptInfo
   }

...
}