| /* |
| * Copyright 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.biometric; |
| |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.os.Build; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import androidx.annotation.RequiresApi; |
| |
| /** |
| * Utilities related to the system {@link PackageManager}. |
| */ |
| class PackageUtils { |
| // Prevent instantiation. |
| private PackageUtils() {} |
| |
| /** |
| * Checks if the current device supports fingerprint authentication. |
| * |
| * @param context The application or activity context. |
| * @return Whether fingerprint is supported. |
| */ |
| static boolean hasSystemFeatureFingerprint(@Nullable Context context) { |
| return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M |
| && context != null |
| && context.getPackageManager() != null |
| && Api23Impl.hasSystemFeatureFingerprint(context.getPackageManager()); |
| } |
| |
| /** |
| * Nested class to avoid verification errors for methods introduced in Android 6.0 (API 23). |
| */ |
| @RequiresApi(Build.VERSION_CODES.M) |
| private static class Api23Impl { |
| // Prevent instantiation. |
| private Api23Impl() {} |
| |
| /** |
| * Checks if the given package manager has support for the fingerprint system feature. |
| * |
| * @param packageManager The system package manager. |
| * @return Whether fingerprint is supported. |
| */ |
| static boolean hasSystemFeatureFingerprint(@NonNull PackageManager packageManager) { |
| return packageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT); |
| } |
| } |
| } |