1 /* 2 * Copyright (C) 2017 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.security; 18 19 import android.content.Context; 20 import android.os.UserManager; 21 import android.security.KeyStore; 22 23 import androidx.preference.PreferenceScreen; 24 25 import com.android.settingslib.RestrictedPreference; 26 import com.android.settingslib.core.lifecycle.Lifecycle; 27 import com.android.settingslib.core.lifecycle.LifecycleObserver; 28 import com.android.settingslib.core.lifecycle.events.OnResume; 29 30 public class ResetCredentialsPreferenceController extends RestrictedEncryptionPreferenceController 31 implements LifecycleObserver, OnResume { 32 33 private static final String KEY_RESET_CREDENTIALS = "credentials_reset"; 34 35 private final KeyStore mKeyStore; 36 37 private RestrictedPreference mPreference; 38 ResetCredentialsPreferenceController(Context context, Lifecycle lifecycle)39 public ResetCredentialsPreferenceController(Context context, Lifecycle lifecycle) { 40 super(context, UserManager.DISALLOW_CONFIG_CREDENTIALS); 41 mKeyStore = KeyStore.getInstance(); 42 if (lifecycle != null) { 43 lifecycle.addObserver(this); 44 } 45 } 46 47 @Override getPreferenceKey()48 public String getPreferenceKey() { 49 return KEY_RESET_CREDENTIALS; 50 } 51 52 @Override displayPreference(PreferenceScreen screen)53 public void displayPreference(PreferenceScreen screen) { 54 super.displayPreference(screen); 55 mPreference = screen.findPreference(getPreferenceKey()); 56 } 57 58 @Override onResume()59 public void onResume() { 60 if (mPreference != null && !mPreference.isDisabledByAdmin()) { 61 mPreference.setEnabled(!mKeyStore.isEmpty()); 62 } 63 } 64 } 65