![]() When an unrecoverable error has been encountered and the authentication process has completed without success, then this callback will be triggered. When the fingerprint doesn’t match with any of the fingerprints registered on the device, then this callback will be triggered. An AuthenticationResult object will be passed the the callback. ![]() When the fingerprint is has been successfully matched with one of the fingerprints registered on the device, then this callback will be triggered. It includes 4 methods: onAuthenticationSucceeded Next we use the BiometricPrompt.AuthenticationCallback to listen for authentication events from the users. A typical BiometricPrompt dialog Step 4: Handle authentication Callback
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