Use same checks as BiometricAuthenticator in UserPreference (#1088)

Author: Skrilltrax

.editorconfig

@@ -12,7 +12,7 @@ insert_final_newline = true
 
 [*.{java,kt,kts,xml}]
 indent_size = 4
-ij_continuation_indent_size = 2
+ij_continuation_indent_size = 4
 
 [*.{kt,kts}]
 kotlin_imports_layout=ascii

app/src/main/java/com/zeapo/pwdstore/UserPreference.kt

@@ -24,7 +24,6 @@ import androidx.activity.result.contract.ActivityResultContracts.OpenDocument
 import androidx.activity.result.contract.ActivityResultContracts.OpenDocumentTree
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.AppCompatTextView
-import androidx.biometric.BiometricManager
 import androidx.core.content.edit
 import androidx.core.content.getSystemService
 import androidx.documentfile.provider.DocumentFile
@@ -281,9 +280,9 @@ class UserPreference : AppCompatActivity() {
             findPreference<CheckBoxPreference>(PreferenceKeys.ENABLE_DEBUG_LOGGING)?.isVisible = !BuildConfig.ENABLE_DEBUG_FEATURES
 
             findPreference<CheckBoxPreference>(PreferenceKeys.BIOMETRIC_AUTH)?.apply {
-                val isFingerprintSupported = BiometricManager.from(requireContext())
-                    .canAuthenticate(BiometricManager.Authenticators.DEVICE_CREDENTIAL) == BiometricManager.BIOMETRIC_SUCCESS
-                if (!isFingerprintSupported) {
+                val canAuthenticate = BiometricAuthenticator.canAuthenticate(prefsActivity)
+
+                if (!canAuthenticate) {
                     isEnabled = false
                     isChecked = false
                     summary = getString(R.string.biometric_auth_summary_error)

app/src/main/java/com/zeapo/pwdstore/utils/BiometricAuthenticator.kt

@@ -20,6 +20,7 @@ import com.zeapo.pwdstore.R
 object BiometricAuthenticator {
 
     private const val TAG = "BiometricAuthenticator"
+    private const val validAuthenticators = Authenticators.DEVICE_CREDENTIAL or Authenticators.BIOMETRIC_WEAK
 
     sealed class Result {
         data class Success(val cryptoObject: BiometricPrompt.CryptoObject?) : Result()
@@ -28,6 +29,10 @@ object BiometricAuthenticator {
         object Cancelled : Result()
     }
 
+    fun canAuthenticate(activity: FragmentActivity): Boolean {
+        return BiometricManager.from(activity).canAuthenticate(validAuthenticators) == BiometricManager.BIOMETRIC_SUCCESS
+    }
+
     fun authenticate(
         activity: FragmentActivity,
         @StringRes dialogTitleRes: Int = R.string.biometric_prompt_title,
@@ -60,10 +65,8 @@ object BiometricAuthenticator {
                 callback(Result.Success(result.cryptoObject))
             }
         }
-        val validAuthenticators = Authenticators.DEVICE_CREDENTIAL or Authenticators.BIOMETRIC_WEAK
-        val canAuth = BiometricManager.from(activity).canAuthenticate(validAuthenticators) == BiometricManager.BIOMETRIC_SUCCESS
         val deviceHasKeyguard = activity.getSystemService<KeyguardManager>()?.isDeviceSecure == true
-        if (canAuth || deviceHasKeyguard) {
+        if (canAuthenticate(activity) || deviceHasKeyguard) {
             val promptInfo = BiometricPrompt.PromptInfo.Builder()
                 .setTitle(activity.getString(dialogTitleRes))
                 .setAllowedAuthenticators(validAuthenticators)