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 24 import androidx.annotation.VisibleForTesting; 25 import androidx.preference.Preference; 26 27 import com.android.settings.accounts.AccountRestrictionHelper; 28 import com.android.settings.core.PreferenceControllerMixin; 29 import com.android.settingslib.RestrictedPreference; 30 import com.android.settingslib.core.AbstractPreferenceController; 31 32 /** 33 * Base class for preference controller that handles preference that enforce adjust volume 34 * restriction 35 */ 36 public class EmergencyBroadcastPreferenceController extends AbstractPreferenceController 37 implements PreferenceControllerMixin { 38 39 private final String mPrefKey; 40 41 private AccountRestrictionHelper mHelper; 42 private UserManager mUserManager; 43 private PackageManager mPm; 44 EmergencyBroadcastPreferenceController(Context context, String prefKey)45 public EmergencyBroadcastPreferenceController(Context context, String prefKey) { 46 this(context, new AccountRestrictionHelper(context), prefKey); 47 } 48 49 @VisibleForTesting(otherwise = VisibleForTesting.NONE) EmergencyBroadcastPreferenceController(Context context, AccountRestrictionHelper helper, String prefKey)50 EmergencyBroadcastPreferenceController(Context context, AccountRestrictionHelper helper, 51 String prefKey) { 52 super(context); 53 mPrefKey = prefKey; 54 mHelper = helper; 55 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 56 mPm = mContext.getPackageManager(); 57 } 58 59 @Override updateState(Preference preference)60 public void updateState(Preference preference) { 61 if (!(preference instanceof RestrictedPreference)) { 62 return; 63 } 64 ((RestrictedPreference) preference).checkRestrictionAndSetDisabled( 65 UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 66 } 67 68 @Override handlePreferenceTreeClick(Preference preference)69 public boolean handlePreferenceTreeClick(Preference preference) { 70 return false; 71 } 72 73 @Override getPreferenceKey()74 public String getPreferenceKey() { 75 return mPrefKey; 76 } 77 78 @Override isAvailable()79 public boolean isAvailable() { 80 return mUserManager.isAdminUser() && isCellBroadcastAppLinkEnabled() 81 && !mHelper.hasBaseUserRestriction( 82 UserManager.DISALLOW_CONFIG_CELL_BROADCASTS, UserHandle.myUserId()); 83 } 84 isCellBroadcastAppLinkEnabled()85 private boolean isCellBroadcastAppLinkEnabled() { 86 // Enable link to CMAS app settings depending on the value in config.xml. 87 boolean enabled = mContext.getResources().getBoolean( 88 com.android.internal.R.bool.config_cellBroadcastAppLinks); 89 if (enabled) { 90 try { 91 if (mPm.getApplicationEnabledSetting("com.android.cellbroadcastreceiver") 92 == PackageManager.COMPONENT_ENABLED_STATE_DISABLED) { 93 enabled = false; // CMAS app disabled 94 } 95 } catch (IllegalArgumentException ignored) { 96 enabled = false; // CMAS app not installed 97 } 98 } 99 return enabled; 100 } 101 102 }