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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.data;
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import android.content.Context;
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import android.database.Cursor;
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import android.provider.ContactsContract.CommonDataKinds.Phone;
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import android.provider.ContactsContract.Data;
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import android.telephony.PhoneNumberUtils;
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import android.util.Log;
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import java.util.HashMap;
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/**
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* 联系人查询工具类
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*
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* 功能：根据电话号码查询对应的联系人姓名
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* 特点：
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* 1. 使用内存缓存提升查询效率
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* 2. 支持电话号码最小匹配规则（国际号码优化）
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* 3. 处理联系人数据库查询异常
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*/
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public class Contact {
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// 联系人缓存：电话号码 -> 联系人姓名
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private static HashMap<String, String> sContactCache;
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private static final String TAG = "Contact"; // 日志标签
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/**
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* 联系人查询的SQL选择语句
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*
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* 结构说明：
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* 1. 使用 PHONE_NUMBERS_EQUAL 进行号码匹配（考虑格式化差异）
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* 2. 限定数据类型为电话类型 (Phone.CONTENT_ITEM_TYPE)
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* 3. 通过子查询关联 phone_lookup 表实现快速索引
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* 4. "+" 是占位符，将被替换为最小匹配长度
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*/
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private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
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+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
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+ " AND " + Data.RAW_CONTACT_ID + " IN "
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+ "(SELECT raw_contact_id "
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+ " FROM phone_lookup"
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+ " WHERE min_match = '+')"; // '+' 将被实际的最小匹配值替换
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/**
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* 根据电话号码获取联系人姓名
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*
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* @param context 上下文对象（用于访问ContentResolver）
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* @param phoneNumber 要查询的电话号码
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* @return 联系人姓名，若未找到则返回null
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*/
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public static String getContact(Context context, String phoneNumber) {
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// 初始化缓存
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if (sContactCache == null) {
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sContactCache = new HashMap<String, String>();
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}
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// 首先检查缓存
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if (sContactCache.containsKey(phoneNumber)) {
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return sContactCache.get(phoneNumber);
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}
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// 生成最小匹配长度（处理国际号码）
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String minMatch = PhoneNumberUtils.toCallerIDMinMatch(phoneNumber);
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// 构建完整查询语句
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String selection = CALLER_ID_SELECTION.replace("+", minMatch);
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// 执行内容提供者查询
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Cursor cursor = context.getContentResolver().query(
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Data.CONTENT_URI, // 联系人数据URI
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new String[]{Phone.DISPLAY_NAME}, // 只需返回姓名字段
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selection, // 动态生成的查询条件
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new String[]{phoneNumber}, // 查询参数（实际号码）
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null); // 无排序要求
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if (cursor != null && cursor.moveToFirst()) {
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try {
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// 读取第一条结果的姓名
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String name = cursor.getString(0);
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// 加入缓存
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sContactCache.put(phoneNumber, name);
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return name;
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} catch (IndexOutOfBoundsException e) {
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Log.e(TAG, "Cursor字段访问错误: " + e.toString());
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return null;
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} finally {
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// 确保关闭游标
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cursor.close();
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}
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} else {
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// 无匹配结果日志
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Log.d(TAG, "未找到匹配的联系人号码: " + phoneNumber);
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return null;
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}
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}
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} |
