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.content.IntentFilter; 21 import android.media.AudioManager; 22 import android.os.UserHandle; 23 import android.os.UserManager; 24 import android.support.v7.preference.Preference; 25 26 import com.android.internal.annotations.VisibleForTesting; 27 import com.android.settings.accounts.AccountRestrictionHelper; 28 import com.android.settings.core.PreferenceControllerMixin; 29 import com.android.settings.core.SliderPreferenceController; 30 import com.android.settingslib.RestrictedPreference; 31 import com.android.settingslib.core.AbstractPreferenceController; 32 33 /** 34 * Base class for preference controller that handles preference that enforce adjust volume 35 * restriction 36 */ 37 public abstract class AdjustVolumeRestrictedPreferenceController extends 38 SliderPreferenceController implements PreferenceControllerMixin { 39 40 private AccountRestrictionHelper mHelper; 41 AdjustVolumeRestrictedPreferenceController(Context context, String key)42 public AdjustVolumeRestrictedPreferenceController(Context context, String key) { 43 this(context, new AccountRestrictionHelper(context), key); 44 } 45 46 @VisibleForTesting AdjustVolumeRestrictedPreferenceController(Context context, AccountRestrictionHelper helper, String key)47 AdjustVolumeRestrictedPreferenceController(Context context, AccountRestrictionHelper helper, 48 String key) { 49 super(context, key); 50 mHelper = helper; 51 } 52 53 @Override updateState(Preference preference)54 public void updateState(Preference preference) { 55 if (!(preference instanceof RestrictedPreference)) { 56 return; 57 } 58 mHelper.enforceRestrictionOnPreference((RestrictedPreference) preference, 59 UserManager.DISALLOW_ADJUST_VOLUME, UserHandle.myUserId()); 60 } 61 62 @Override getIntentFilter()63 public IntentFilter getIntentFilter() { 64 final IntentFilter filter = new IntentFilter(); 65 filter.addAction(AudioManager.VOLUME_CHANGED_ACTION); 66 filter.addAction(AudioManager.STREAM_MUTE_CHANGED_ACTION); 67 filter.addAction(AudioManager.MASTER_MUTE_CHANGED_ACTION); 68 return filter; 69 } 70 } 71