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@ -1,91 +0,0 @@
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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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// 用于缓存电话号码与联系人姓名的映射关系，提高查询效率
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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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// 查询联系人数据库的SQL选择语句
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// 这个复杂查询：
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// 1. 检查电话号码是否匹配（考虑不同格式）
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// 2. 验证数据类型是电话号码
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// 3. 确保原始联系人存在于phone_lookup表中
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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 = '+')";
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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 应用上下文
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* @param phoneNumber 要查询的电话号码
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* @return 如果找到则返回联系人姓名，否则返回null
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*/
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public static String getContact(Context context, String phoneNumber) {
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// 如果缓存不存在，则初始化
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if(sContactCache == null) {
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sContactCache = new HashMap<String, String>();
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}
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// 如果缓存中已有结果，直接返回
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if(sContactCache.containsKey(phoneNumber)) {
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return sContactCache.get(phoneNumber);
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}
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// 准备查询语句，将'+'替换为电话号码的最小匹配模式（处理不同格式）
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String selection = CALLER_ID_SELECTION.replace("+",
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PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
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// 查询联系人数据库
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Cursor cursor = context.getContentResolver().query(
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Data.CONTENT_URI, // 联系人数据的内容URI
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new String [] { Phone.DISPLAY_NAME }, // 只获取显示名称
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selection, // 准备好的查询条件
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new String[] { phoneNumber }, // 查询参数
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null); // 无排序要求
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// 处理查询结果
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if (cursor != null && cursor.moveToFirst()) {
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try {
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// 从第一条结果获取联系人姓名
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String name = cursor.getString(0);
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// 将结果缓存以备后用
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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 get string error " + e.toString());
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return null;
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} finally {
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// 始终关闭游标，避免内存泄漏
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cursor.close();
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}
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} else {
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Log.d(TAG, "No contact matched with number:" + phoneNumber);
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return null;
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}
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}
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}
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