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 package com.android.emergency.view; 17 18 import android.app.Fragment; 19 import android.content.Context; 20 import android.content.SharedPreferences; 21 import android.os.Bundle; 22 import android.preference.PreferenceFragment; 23 import android.preference.PreferenceManager; 24 import android.widget.ListView; 25 26 import com.android.emergency.PreferenceKeys; 27 import com.android.emergency.R; 28 import com.android.emergency.preferences.EmergencyContactsPreference; 29 30 import java.util.Collections; 31 32 /** 33 * Fragment that displays emergency contacts. 34 */ 35 public class ViewEmergencyContactsFragment extends PreferenceFragment { 36 /** The category that holds the emergency contacts. */ 37 private EmergencyContactsPreference mEmergencyContactsPreference; 38 39 @Override onCreate(Bundle savedInstanceState)40 public void onCreate(Bundle savedInstanceState) { 41 super.onCreate(savedInstanceState); 42 addPreferencesFromResource(R.xml.view_emergency_contacts); 43 mEmergencyContactsPreference = (EmergencyContactsPreference) 44 findPreference(PreferenceKeys.KEY_EMERGENCY_CONTACTS); 45 } 46 47 @Override onActivityCreated(Bundle savedInstanceState)48 public void onActivityCreated(Bundle savedInstanceState) { 49 super.onActivityCreated(savedInstanceState); 50 // Set custom dividers 51 ListView list = (ListView) getView().findViewById(android.R.id.list); 52 list.setDivider(getResources().getDrawable(R.drawable.view_contact_divider)); 53 } 54 55 56 @Override onResume()57 public void onResume() { 58 super.onResume(); 59 mEmergencyContactsPreference.reloadFromPreference(); 60 } 61 newInstance()62 public static Fragment newInstance() { 63 return new ViewEmergencyContactsFragment(); 64 } 65 66 /** Returns true if there is at least one valid (still existing) emergency contact. */ hasAtLeastOneEmergencyContact(Context context)67 public static boolean hasAtLeastOneEmergencyContact(Context context) { 68 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); 69 String emergencyContactsString = ""; 70 try { 71 emergencyContactsString = prefs.getString(PreferenceKeys.KEY_EMERGENCY_CONTACTS, ""); 72 } catch (ClassCastException e) { 73 // Protect against b/28194605: We used to store the contacts using a string set. 74 // If it is a string set, ignore its value. If it is not a string set it will throw 75 // a ClassCastException 76 prefs.getStringSet( 77 PreferenceKeys.KEY_EMERGENCY_CONTACTS, 78 Collections.<String>emptySet()); 79 } 80 81 return !EmergencyContactsPreference.deserializeAndFilter( 82 PreferenceKeys.KEY_EMERGENCY_CONTACTS, 83 context, 84 emergencyContactsString).isEmpty(); 85 } 86 } 87