public void Authenticate(IBioAuthCompleted bioAuthCompleted)
{
var context = CrossCurrentActivity.Current.AppContext;
var biometricManager = BiometricManager.From(context);
switch (biometricManager.CanAuthenticate())
{
case BiometricManager.BiometricSuccess:
//Log.d("MY_APP_TAG", "App can authenticate using biometrics.");
ShowBiometicPrompt(bioAuthCompleted);
break;
case BiometricManager.BiometricErrorNoHardware:
bioAuthCompleted.OnCompleted(BioAuthStatus.ENROLL_BiometricErrorNoHardware);
break;
case BiometricManager.BiometricErrorHwUnavailable:
bioAuthCompleted.OnCompleted(BioAuthStatus.ENROLL_BiometricErrorHwUnavailable);
break;
case BiometricManager.BiometricErrorNoneEnrolled:
bioAuthCompleted.OnCompleted(BioAuthStatus.ENROLL_BiometricErrorNoneEnrolled);
break;
}
//MessagingCenter.Send(this, "BioAuth", "Message from Android");
//bioAuthCompleted.OnCompleted(BioAuthStatus.SUCCESS);
}
private void ShowBiometicPrompt(IBioAuthCompleted bioAuthCompleted)
{
var activity = (FragmentActivity)CrossCurrentActivity.Current.Activity;
var executor = ContextCompat.GetMainExecutor(activity);
var callback = new BiometricAuthenticationCallback
{
Success = (AndroidX.Biometric.BiometricPrompt.AuthenticationResult result) => {
try
{
bioAuthCompleted.OnCompleted(BioAuthStatus.SUCCESS);
}
catch (SignatureException)
{
throw new RuntimeException();
}
},
Failed = () => {
// TODO: Show error.
bioAuthCompleted.OnCompleted(BioAuthStatus.FAILED);
},
Help = (BiometricAcquiredStatus helpCode, ICharSequence helpString) => {
// TODO: What do we do here?
}
};
//Create prompt info
var promptInfo = new AndroidX.Biometric.BiometricPrompt.PromptInfo.Builder()
.SetTitle("Biometric login for my app")
.SetSubtitle("Log in using your biometric credential")
.SetNegativeButtonText("Use account password")
.Build();
//Create prompt
var biometricPrompt = new AndroidX.Biometric.BiometricPrompt(activity, executor, callback);
//call Authenticate
biometricPrompt.Authenticate(promptInfo);
}