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.security;
18 
19 import android.content.Context;
20 import android.os.PersistableBundle;
21 import android.os.UserManager;
22 import android.telephony.CarrierConfigManager;
23 import android.telephony.SubscriptionInfo;
24 import android.telephony.SubscriptionManager;
25 import android.telephony.TelephonyManager;
26 
27 import androidx.preference.Preference;
28 import androidx.preference.PreferenceScreen;
29 
30 import com.android.settings.core.BasePreferenceController;
31 
32 import java.util.List;
33 
34 public class SimLockPreferenceController extends BasePreferenceController {
35 
36     private static final String KEY_SIM_LOCK = "sim_lock_settings";
37 
38     private final CarrierConfigManager mCarrierConfigManager;
39     private final UserManager mUserManager;
40     private final SubscriptionManager mSubscriptionManager;
41     private TelephonyManager mTelephonyManager;
42 
SimLockPreferenceController(Context context)43     public SimLockPreferenceController(Context context) {
44         this(context, KEY_SIM_LOCK);
45     }
46 
SimLockPreferenceController(Context context, String key)47     public SimLockPreferenceController(Context context, String key) {
48         super(context, key);
49         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
50         mCarrierConfigManager = (CarrierConfigManager)
51                 mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE);
52         mSubscriptionManager = (SubscriptionManager) context
53                 .getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);
54         mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
55     }
56 
57     @Override
getAvailabilityStatus()58     public int getAvailabilityStatus() {
59         final List<SubscriptionInfo> subInfoList =
60                 mSubscriptionManager.getActiveSubscriptionInfoList();
61 
62         if (subInfoList == null) {
63             return DISABLED_FOR_USER;
64         }
65 
66         final boolean isAdmin = mUserManager.isAdminUser();
67         if (isAdmin && (!isHideSimLockSetting(subInfoList))) {
68             return AVAILABLE;
69         }
70 
71         return DISABLED_FOR_USER;
72     }
73 
74     @Override
displayPreference(PreferenceScreen screen)75     public void displayPreference(PreferenceScreen screen) {
76         super.displayPreference(screen);
77         final Preference preference = screen.findPreference(getPreferenceKey());
78         if (preference == null) {
79             return;
80         }
81         // Disable SIM lock if there is no ready SIM card.
82         preference.setEnabled(isSimReady());
83     }
84 
85     /* Return true if a SIM is ready for locking.
86      * TODO: consider adding to TelephonyManager or SubscritpionManasger.
87      */
isSimReady()88     private boolean isSimReady() {
89         final List<SubscriptionInfo> subInfoList =
90                 mSubscriptionManager.getActiveSubscriptionInfoList();
91         if (subInfoList == null) {
92             return false;
93         }
94 
95         for (SubscriptionInfo subInfo : subInfoList) {
96             final int simState = mTelephonyManager.getSimState(subInfo.getSimSlotIndex());
97             if ((simState != TelephonyManager.SIM_STATE_ABSENT)
98                     && (simState != TelephonyManager.SIM_STATE_UNKNOWN)) {
99                 return true;
100             }
101         }
102         return false;
103     }
104 
isHideSimLockSetting(List<SubscriptionInfo> subInfoList)105     private boolean isHideSimLockSetting(List<SubscriptionInfo> subInfoList) {
106         if (subInfoList == null) {
107             return true;
108         }
109 
110         for (SubscriptionInfo subInfo : subInfoList) {
111             final TelephonyManager telephonyManager = mTelephonyManager
112                     .createForSubscriptionId(subInfo.getSubscriptionId());
113             final PersistableBundle bundle = mCarrierConfigManager.getConfigForSubId(
114                     subInfo.getSubscriptionId());
115             if (telephonyManager.hasIccCard() && bundle != null
116                     && !bundle.getBoolean(CarrierConfigManager.KEY_HIDE_SIM_LOCK_SETTINGS_BOOL)) {
117                 // one or more sims show sim lock setting UI.
118                 return false;
119             }
120         }
121 
122         return true;
123     }
124 }
125