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.pm.PackageManager; 21 import android.os.UserHandle; 22 import android.os.UserManager; 23 import android.support.annotation.VisibleForTesting; 24 import android.support.v7.preference.Preference; 25 26 import com.android.settings.accounts.AccountRestrictionHelper; 27 import com.android.settings.core.PreferenceControllerMixin; 28 import com.android.settingslib.RestrictedPreference; 29 import com.android.settingslib.core.AbstractPreferenceController; 30 31 /** 32 * Base class for preference controller that handles preference that enforce adjust volume 33 * restriction 34 */ 35 public class EmergencyBroadcastPreferenceController extends AbstractPreferenceController 36 implements PreferenceControllerMixin { 37 38 private final String mPrefKey; 39 40 private AccountRestrictionHelper mHelper; 41 private UserManager mUserManager; 42 private PackageManager mPm; 43 EmergencyBroadcastPreferenceController(Context context, String prefKey)44 public EmergencyBroadcastPreferenceController(Context context, String prefKey) { 45 this(context, new AccountRestrictionHelper(context), prefKey); 46 } 47 48 @VisibleForTesting(otherwise = VisibleForTesting.NONE) EmergencyBroadcastPreferenceController(Context context, AccountRestrictionHelper helper, String prefKey)49 EmergencyBroadcastPreferenceController(Context context, AccountRestrictionHelper helper, 50 String prefKey) { 51 super(context); 52 mPrefKey = prefKey; 53 mHelper = helper; 54 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 55 mPm = mContext.getPackageManager(); 56 } 57 58 @Override updateState(Preference preference)59 public void updateState(Preference preference) { 60 if (!(preference instanceof RestrictedPreference)) { 61 return; 62 } 63 ((RestrictedPreference) preference).checkRestrictionAndSetDisabled( 64 UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 65 } 66 67 @Override handlePreferenceTreeClick(Preference preference)68 public boolean handlePreferenceTreeClick(Preference preference) { 69 return false; 70 } 71 72 @Override getPreferenceKey()73 public String getPreferenceKey() { 74 return mPrefKey; 75 } 76 77 @Override isAvailable()78 public boolean isAvailable() { 79 return mUserManager.isAdminUser() && isCellBroadcastAppLinkEnabled() 80 && !mHelper.hasBaseUserRestriction( 81 UserManager.DISALLOW_CONFIG_CELL_BROADCASTS, UserHandle.myUserId()); 82 } 83 isCellBroadcastAppLinkEnabled()84 private boolean isCellBroadcastAppLinkEnabled() { 85 // Enable link to CMAS app settings depending on the value in config.xml. 86 boolean enabled = mContext.getResources().getBoolean( 87 com.android.internal.R.bool.config_cellBroadcastAppLinks); 88 if (enabled) { 89 try { 90 if (mPm.getApplicationEnabledSetting("com.android.cellbroadcastreceiver") 91 == PackageManager.COMPONENT_ENABLED_STATE_DISABLED) { 92 enabled = false; // CMAS app disabled 93 } 94 } catch (IllegalArgumentException ignored) { 95 enabled = false; // CMAS app not installed 96 } 97 } 98 return enabled; 99 } 100 101 }