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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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public class Contact {
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// 静态缓存，用于存储已查询过的电话号码和对应的联系人姓名
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private static HashMap<String, String> sContactCache;
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// 日志标签
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private static final String TAG = "Contact";
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// SQL查询语句模板，用于根据电话号码查找联系人
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private static final String CALLER_ID_SELECTION =
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"PHONE_NUMBERS_EQUAL(" + Phone.NUMBER + ",?) AND " +
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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 = '+')";
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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 上下文环境
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* @param phoneNumber 要查询的电话号码
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* @return 对应的联系人姓名，如果未找到则返回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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// 如果缓存中已有该电话号码的记录，则直接返回缓存中的联系人姓名
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if (sContactCache.containsKey(phoneNumber)) {
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return sContactCache.get(phoneNumber);
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}
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// 根据电话号码生成SQL查询语句
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String selection = CALLER_ID_SELECTION.replace("+", PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
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// 查询联系人数据库，获取对应的联系人姓名
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Cursor cursor = context.getContentResolver().query(
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Data.CONTENT_URI, // 查询的URI
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new String[] { Phone.DISPLAY_NAME }, // 查询的列
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selection, // 查询条件
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new String[] { phoneNumber }, // 查询条件的参数
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null // 排序方式
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);
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// TODO: 此处应添加处理查询结果并更新缓存的代码
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// 注意：在实际使用中，需要确保cursor被正确关闭以避免资源泄露
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// 例如，可以在finally块中调用cursor.close()
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return null; // 如果没有找到对应的联系人，则返回null
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}
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}
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