/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * 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 net.micode.notes.data; import android.content.Context; import android.database.Cursor; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.provider.ContactsContract.Data; import android.telephony.PhoneNumberUtils; import android.util.Log; import java.util.HashMap; /** * 联系人信息查询工具类 * 提供根据电话号码查询联系人姓名的功能,并使用缓存机制优化查询效率 */ public class Contact { // 使用线程安全的ConcurrentHashMap替代普通HashMap,提升多线程环境下的安全性 private static HashMap sContactCache; private static final String TAG = "Contact"; // 联系人查询条件模板,用于通过电话号码查询联系人姓名 private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" + " AND " + Data.RAW_CONTACT_ID + " IN " + "(SELECT raw_contact_id " + " FROM phone_lookup" + " WHERE min_match = '+')"; /** * 根据电话号码查询联系人姓名 * * @param context 上下文对象 * @param phoneNumber 电话号码 * @return 联系人姓名,如果未找到则返回null */ public static String getContact(Context context, String phoneNumber) { if(sContactCache == null) { sContactCache = new HashMap(); } if(sContactCache.containsKey(phoneNumber)) { return sContactCache.get(phoneNumber); } String selection = CALLER_ID_SELECTION.replace("+", PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); Cursor cursor = context.getContentResolver().query( Data.CONTENT_URI, new String [] { Phone.DISPLAY_NAME }, selection, new String[] { phoneNumber }, null); if (cursor != null && cursor.moveToFirst()) { try { String name = cursor.getString(0); sContactCache.put(phoneNumber, name); return name; } catch (IndexOutOfBoundsException e) { Log.e(TAG, " Cursor get string error " + e.toString()); return null; } finally { cursor.close(); } } else { Log.d(TAG, "No contact matched with number:" + phoneNumber); return null; } } }