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      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 
     37     public AdjustVolumeRestrictedPreferenceController(Context context) {
     38         this(context, new AccountRestrictionHelper(context));
     39     }
     40 
     41     @VisibleForTesting
     42     AdjustVolumeRestrictedPreferenceController(Context context, AccountRestrictionHelper helper) {
     43         super(context);
     44         mHelper = helper;
     45     }
     46 
     47     @Override
     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