1 /* 2 * Copyright (C) 2017 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 package com.android.emergency.util; 17 18 import android.content.ComponentName; 19 import android.content.Context; 20 import android.content.SharedPreferences; 21 import android.content.pm.PackageManager; 22 import androidx.preference.PreferenceManager; 23 import android.text.TextUtils; 24 25 import com.android.emergency.PreferenceKeys; 26 import com.android.emergency.edit.EditInfoActivity; 27 import com.android.emergency.preferences.EmergencyContactsPreference; 28 import com.android.internal.annotations.VisibleForTesting; 29 30 import java.util.Collections; 31 32 /** Utility methods for dealing with preferences. */ 33 public class PreferenceUtils { 34 @VisibleForTesting 35 public static final String SETTINGS_SUGGESTION_ACTIVITY_ALIAS = ".edit.EditInfoSuggestion"; 36 37 /** Returns true if there is at least one preference set. */ hasAtLeastOnePreferenceSet(Context context)38 public static boolean hasAtLeastOnePreferenceSet(Context context) { 39 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); 40 for (String key : PreferenceKeys.KEYS_VIEW_EMERGENCY_INFO) { 41 if (!TextUtils.isEmpty(prefs.getString(key, ""))) { 42 return true; 43 } 44 } 45 return false; 46 } 47 48 /** Returns true if there is at least one valid (still existing) emergency contact. */ hasAtLeastOneEmergencyContact(Context context)49 public static boolean hasAtLeastOneEmergencyContact(Context context) { 50 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); 51 String emergencyContactsString = ""; 52 try { 53 emergencyContactsString = prefs.getString(PreferenceKeys.KEY_EMERGENCY_CONTACTS, ""); 54 } catch (ClassCastException e) { 55 // Protect against b/28194605: We used to store the contacts using a string set. 56 // If it is a string set, ignore its value. If it is not a string set it will throw 57 // a ClassCastException 58 prefs.getStringSet( 59 PreferenceKeys.KEY_EMERGENCY_CONTACTS, 60 Collections.<String>emptySet()); 61 } 62 63 return !EmergencyContactsPreference.deserializeAndFilter( 64 PreferenceKeys.KEY_EMERGENCY_CONTACTS, 65 context, 66 emergencyContactsString).isEmpty(); 67 } 68 69 /** 70 * Enables or disables the settings suggestion for this application, depending on whether any 71 * emergency settings exist. 72 */ updateSettingsSuggestionState(Context context)73 public static void updateSettingsSuggestionState(Context context) { 74 int state = hasAtLeastOnePreferenceOrContactSet(context) ? 75 PackageManager.COMPONENT_ENABLED_STATE_DISABLED : 76 PackageManager.COMPONENT_ENABLED_STATE_ENABLED; 77 setSettingsSuggestionState(context, state); 78 } 79 80 /** Enables the settings suggestion for this application. */ enableSettingsSuggestion(Context context)81 public static void enableSettingsSuggestion(Context context) { 82 setSettingsSuggestionState(context, PackageManager.COMPONENT_ENABLED_STATE_ENABLED); 83 } 84 hasAtLeastOnePreferenceOrContactSet(Context context)85 private static boolean hasAtLeastOnePreferenceOrContactSet(Context context) { 86 return hasAtLeastOnePreferenceSet(context) || hasAtLeastOneEmergencyContact(context); 87 } 88 setSettingsSuggestionState(Context context, int state)89 private static void setSettingsSuggestionState(Context context, int state) { 90 String packageName = context.getPackageName(); 91 String targetClass = packageName + SETTINGS_SUGGESTION_ACTIVITY_ALIAS; 92 ComponentName name = new ComponentName(packageName, targetClass); 93 PackageManager pm = context.getPackageManager(); 94 pm.setComponentEnabledSetting(name, state, PackageManager.DONT_KILL_APP); 95 } 96 } 97