1 /*
2  * Copyright (C) 2016 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.notification;
18 
19 import android.content.Context;
20 import android.os.UserHandle;
21 import android.os.UserManager;
22 import android.support.v7.preference.Preference;
23 
24 import com.android.internal.annotations.VisibleForTesting;
25 import com.android.settings.accounts.AccountRestrictionHelper;
26 import com.android.settings.core.PreferenceController;
27 import com.android.settingslib.RestrictedPreference;
28 
29 /**
30  * Base class for preference controller that handles preference that enforce adjust volume
31  * restriction
32  */
33 public abstract class AdjustVolumeRestrictedPreferenceController extends PreferenceController {
34 
35     private AccountRestrictionHelper mHelper;
36 
AdjustVolumeRestrictedPreferenceController(Context context)37     public AdjustVolumeRestrictedPreferenceController(Context context) {
38         this(context, new AccountRestrictionHelper(context));
39     }
40 
41     @VisibleForTesting
AdjustVolumeRestrictedPreferenceController(Context context, AccountRestrictionHelper helper)42     AdjustVolumeRestrictedPreferenceController(Context context, AccountRestrictionHelper helper) {
43         super(context);
44         mHelper = helper;
45     }
46 
47     @Override
updateState(Preference preference)48     public void updateState(Preference preference) {
49         if (!(preference instanceof RestrictedPreference)) {
50             return;
51         }
52         mHelper.enforceRestrictionOnPreference((RestrictedPreference) preference,
53                 UserManager.DISALLOW_ADJUST_VOLUME, UserHandle.myUserId());
54     }
55 
56 }
57