1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.settings.biometrics.face; 18 19 import static android.provider.Settings.Secure.FACE_UNLOCK_APP_ENABLED; 20 21 import android.content.Context; 22 import android.hardware.face.FaceManager; 23 import android.provider.Settings; 24 25 import androidx.preference.Preference; 26 27 import com.android.settings.Utils; 28 29 /** 30 * Preference controller for Face settings page controlling the ability to use 31 * Face authentication in apps (through BiometricPrompt). 32 */ 33 public class FaceSettingsAppPreferenceController extends FaceSettingsPreferenceController { 34 35 static final String KEY = "security_settings_face_app"; 36 37 private static final int ON = 1; 38 private static final int OFF = 0; 39 private static final int DEFAULT = ON; // face unlock is enabled for BiometricPrompt by default 40 41 private FaceManager mFaceManager; 42 FaceSettingsAppPreferenceController(Context context, String preferenceKey)43 public FaceSettingsAppPreferenceController(Context context, String preferenceKey) { 44 super(context, preferenceKey); 45 mFaceManager = Utils.getFaceManagerOrNull(context); 46 } 47 FaceSettingsAppPreferenceController(Context context)48 public FaceSettingsAppPreferenceController(Context context) { 49 this(context, KEY); 50 } 51 52 @Override isChecked()53 public boolean isChecked() { 54 if (!FaceSettings.isFaceHardwareDetected(mContext)) { 55 return false; 56 } 57 return Settings.Secure.getIntForUser( 58 mContext.getContentResolver(), FACE_UNLOCK_APP_ENABLED, DEFAULT, getUserId()) == ON; 59 } 60 61 @Override setChecked(boolean isChecked)62 public boolean setChecked(boolean isChecked) { 63 return Settings.Secure.putIntForUser(mContext.getContentResolver(), FACE_UNLOCK_APP_ENABLED, 64 isChecked ? ON : OFF, getUserId()); 65 } 66 67 @Override updateState(Preference preference)68 public void updateState(Preference preference) { 69 super.updateState(preference); 70 if (!FaceSettings.isFaceHardwareDetected(mContext)) { 71 preference.setEnabled(false); 72 } else if (!mFaceManager.hasEnrolledTemplates(getUserId())) { 73 preference.setEnabled(false); 74 } else { 75 preference.setEnabled(true); 76 } 77 } 78 79 @Override getAvailabilityStatus()80 public int getAvailabilityStatus() { 81 // When the device supports multiple biometrics auth, this preference will be hidden. 82 if (Utils.isMultipleBiometricsSupported(mContext)) { 83 return UNSUPPORTED_ON_DEVICE; 84 } 85 86 if(mFaceManager == null){ 87 return AVAILABLE_UNSEARCHABLE; 88 } 89 90 // By only allowing this preference controller to be searchable when the feature is turned 91 // off, it will give preference to the face setup controller. 92 final boolean hasEnrolledUser = mFaceManager.hasEnrolledTemplates(getUserId()); 93 final boolean appUnlockEnabled = Settings.Secure.getIntForUser( 94 mContext.getContentResolver(), FACE_UNLOCK_APP_ENABLED, OFF, getUserId()) == ON; 95 if (hasEnrolledUser && !appUnlockEnabled) { 96 return AVAILABLE; 97 } else { 98 return AVAILABLE_UNSEARCHABLE; 99 } 100 } 101 } 102