Biometric Authentication Android

Biometric.java

 private void biometricPromptDialog() {
        BiometricManager biometricManager = BiometricManager.from(this);
        switch (biometricManager.canAuthenticate(BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.DEVICE_CREDENTIAL)) {
            case BiometricManager.BIOMETRIC_SUCCESS:
                Log.d("MY_APP_TAG", "App can authenticate using biometrics.");
                break;
            case BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE:
                Log.e("MY_APP_TAG", "No biometric features available on this device.");
                b.biometricCardView.setVisibility(View.GONE);
                break;
            case BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE:
                Log.e("MY_APP_TAG", "Biometric features are currently unavailable.");
                b.biometricCardView.setVisibility(View.GONE);
                break;
            case BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED:
                // Prompts the user to create credentials that your app accepts.
                final Intent enrollIntent = new Intent(Settings.ACTION_BIOMETRIC_ENROLL);
                enrollIntent.putExtra(Settings.EXTRA_BIOMETRIC_AUTHENTICATORS_ALLOWED,BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.DEVICE_CREDENTIAL);
                startActivityForResult(enrollIntent, IntentIntegrator.REQUEST_CODE);
                break;
        }

        Executor executor = ContextCompat.getMainExecutor(this);

        BiometricPrompt biometricPrompt = new BiometricPrompt(this, executor, new BiometricPrompt.AuthenticationCallback() {
            @Override
            public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
                super.onAuthenticationError(errorCode, errString);
                viewEditAndSave();
            }

            @Override
            public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
                authComplete = true;
                viewEditAndSave();
                super.onAuthenticationSucceeded(result);
            }

            @Override
            public void onAuthenticationFailed() {
                super.onAuthenticationFailed();
            }
        });

        BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
                .setTitle(getString(R.string.biometric_title))
                .setSubtitle(getString(R.string.biometric_subtitle))
                .setDescription(getString(R.string.biometric_desc))
                .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.DEVICE_CREDENTIAL)
                .setConfirmationRequired(false)
                .build();

        if(biometricEnabled){
            b.biometricsSwitch.setChecked(true);
        }

        b.biometricsSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    if (isChecked) {
                        biometricEnabled = true;
                    } else {
                        biometricEnabled = false;
                    }
                    biometricPrompt.authenticate(promptInfo);

            }
        });

    }