| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.emergency; |
| |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import android.database.Cursor; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.net.Uri; |
| import android.provider.ContactsContract; |
| import android.util.ArraySet; |
| |
| import java.io.ByteArrayInputStream; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** |
| * Manages emergency contacts of the user. |
| */ |
| public class EmergencyContactManager { |
| private final SharedPreferences mSharedPreferences; |
| private final String mKey; |
| private final Context mContext; |
| |
| /** |
| * Creates a new instance initialized with context and the shared preferences used to store the |
| * emergency contacts under the specified key. |
| */ |
| public EmergencyContactManager(Context context, SharedPreferences sharedPreferences, |
| String key) { |
| mContext = context; |
| mSharedPreferences = sharedPreferences; |
| mKey = key; |
| } |
| |
| /** |
| * Adds a new contact to the emergency contacts. */ |
| public void addContact(Uri contactUri) { |
| // TODO: Consider refactoring this to use always setContacts() rather than |
| // addContact()/removeContact() |
| Set<Uri> emergencyContacts = getEmergencyContacts(); |
| if (emergencyContacts.add(contactUri)) { |
| setEmergencyContacts(emergencyContacts); |
| } |
| } |
| |
| /** Removes the specified contact from the list of emergency contacts. */ |
| public void removeContact(Uri contactUri) { |
| // TODO: Consider refactoring this to use always setContacts() rather than |
| // addContact()/removeContact() |
| Set<Uri> emergencyContacts = getEmergencyContacts(); |
| if (emergencyContacts.remove(contactUri)) { |
| setEmergencyContacts(emergencyContacts); |
| } |
| } |
| |
| public Set<Uri> getEmergencyContacts() { |
| Set<String> emergencyContactStrings = mSharedPreferences.getStringSet(mKey, |
| Collections.<String>emptySet()); |
| Set<Uri> emergencyContacts = new ArraySet<Uri>(emergencyContactStrings.size()); |
| for (String emergencyContact : emergencyContactStrings) { |
| Uri contactUri = Uri.parse(emergencyContact); |
| if (isValidEmergencyContact(contactUri)) { |
| emergencyContacts.add(contactUri); |
| } |
| } |
| // If not all contacts were added, then we need to overwrite the emergency contacts stored |
| // in shared preferences. This deals with emergency contacts being deleted from contacts: |
| // currently we have no way to being notified when this happens. |
| if (emergencyContacts.size() != emergencyContactStrings.size()) { |
| setEmergencyContacts(emergencyContacts); |
| } |
| return emergencyContacts; |
| } |
| |
| /** Returns the display name of the contact. */ |
| public static String getName(Context context, Uri contactUri) { |
| Cursor cursor = context.getContentResolver().query(contactUri, null, null, null, null); |
| try { |
| if (cursor != null && cursor.moveToFirst()) { |
| return cursor.getString(cursor.getColumnIndex( |
| ContactsContract.Contacts.DISPLAY_NAME)); |
| } |
| } finally { |
| cursor.close(); |
| } |
| return null; |
| } |
| |
| private static boolean contactExists(Context context, Uri contactUri) { |
| Cursor cursor = context.getContentResolver().query(contactUri, null, null, null, null); |
| try { |
| if (cursor != null && cursor.moveToFirst()) { |
| return true; |
| } |
| } finally { |
| cursor.close(); |
| } |
| return false; |
| } |
| |
| /** Returns the phone number of the contact. */ |
| public static String getNumber(Context context, Uri contactUri) { |
| // TODO: Investigate if this can be done in 1 query instead of 2. |
| ContentResolver contentResolver = context.getContentResolver(); |
| Cursor contactCursor = contentResolver.query(contactUri, null, null, null, null); |
| try { |
| if (contactCursor != null && contactCursor.moveToFirst()) { |
| String id = contactCursor.getString( |
| contactCursor.getColumnIndex(ContactsContract.Contacts._ID)); |
| if (contactCursor.getInt(contactCursor.getColumnIndex( |
| ContactsContract.Contacts.HAS_PHONE_NUMBER)) != 0) { |
| Cursor phoneCursor = contentResolver.query( |
| ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, |
| ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?", |
| new String[]{id}, null); |
| try { |
| if (phoneCursor != null && phoneCursor.moveToFirst()) { |
| return phoneCursor.getString( |
| phoneCursor.getColumnIndex( |
| ContactsContract.CommonDataKinds.Phone.NUMBER)); |
| } |
| } finally { |
| phoneCursor.close(); |
| } |
| } |
| } |
| } finally { |
| contactCursor.close(); |
| } |
| return null; |
| } |
| |
| /** Returns the Bitmap corresponding to the contact's photo. */ |
| public static Bitmap getContactPhoto(Context context, Uri contactUri) { |
| Uri photoUri = Uri.withAppendedPath(contactUri, |
| ContactsContract.Contacts.Photo.CONTENT_DIRECTORY); |
| Cursor cursor = context.getContentResolver().query(photoUri, |
| new String[]{ContactsContract.Contacts.Photo.PHOTO}, null, null, null); |
| if (cursor == null) { |
| return null; |
| } |
| try { |
| if (cursor.moveToFirst()) { |
| byte[] data = cursor.getBlob(0); |
| if (data != null) { |
| return BitmapFactory.decodeStream(new ByteArrayInputStream(data)); |
| } |
| } |
| } finally { |
| cursor.close(); |
| } |
| return null; |
| } |
| |
| |
| /** Returns whether the contact uri is not null and corresponds to an existing contact. */ |
| private boolean isValidEmergencyContact(Uri contactUri) { |
| return contactUri != null && contactExists(mContext, contactUri); |
| } |
| |
| private void setEmergencyContacts(Set<Uri> emergencyContacts) { |
| Set<String> emergencyContactStrings = new ArraySet<String>(emergencyContacts.size()); |
| for (Uri contactUri : emergencyContacts) { |
| emergencyContactStrings.add(contactUri.toString()); |
| } |
| mSharedPreferences.edit().putStringSet(mKey, emergencyContactStrings).commit(); |
| } |
| } |