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_KEYGUARD_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 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin; 29 import com.android.settingslib.RestrictedSwitchPreference; 30 31 /** 32 * Preference controller for Face settings page controlling the ability to unlock the phone 33 * with face. 34 */ 35 public class FaceSettingsKeyguardPreferenceController extends FaceSettingsPreferenceController { 36 37 static final String KEY = "security_settings_face_keyguard"; 38 39 private static final int ON = 1; 40 private static final int OFF = 0; 41 private static final int DEFAULT = ON; // face unlock is enabled on keyguard by default 42 43 private FaceManager mFaceManager; 44 FaceSettingsKeyguardPreferenceController(Context context, String preferenceKey)45 public FaceSettingsKeyguardPreferenceController(Context context, String preferenceKey) { 46 super(context, preferenceKey); 47 mFaceManager = Utils.getFaceManagerOrNull(context); 48 } 49 FaceSettingsKeyguardPreferenceController(Context context)50 public FaceSettingsKeyguardPreferenceController(Context context) { 51 this(context, KEY); 52 } 53 54 @Override isChecked()55 public boolean isChecked() { 56 if (!FaceSettings.isFaceHardwareDetected(mContext)) { 57 return false; 58 } else if (getRestrictingAdmin() != null) { 59 return false; 60 } 61 return Settings.Secure.getIntForUser(mContext.getContentResolver(), 62 FACE_UNLOCK_KEYGUARD_ENABLED, DEFAULT, getUserId()) == ON; 63 } 64 65 @Override setChecked(boolean isChecked)66 public boolean setChecked(boolean isChecked) { 67 return Settings.Secure.putIntForUser(mContext.getContentResolver(), 68 FACE_UNLOCK_KEYGUARD_ENABLED, isChecked ? ON : OFF, getUserId()); 69 } 70 71 @Override getAvailabilityStatus()72 public int getAvailabilityStatus() { 73 // When the device supports multiple biometrics auth, this preference will be unavailable. 74 return Utils.isMultipleBiometricsSupported(mContext) ? UNSUPPORTED_ON_DEVICE : AVAILABLE; 75 } 76 77 @Override updateState(Preference preference)78 public void updateState(Preference preference) { 79 EnforcedAdmin admin; 80 super.updateState(preference); 81 if (!FaceSettings.isFaceHardwareDetected(mContext)) { 82 preference.setEnabled(false); 83 } else if ((admin = getRestrictingAdmin()) != null) { 84 ((RestrictedSwitchPreference) preference).setDisabledByAdmin(admin); 85 } else if (!mFaceManager.hasEnrolledTemplates(getUserId())) { 86 preference.setEnabled(false); 87 } else { 88 preference.setEnabled(true); 89 } 90 } 91 } 92