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test/src/Contact.java

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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;
/**
* 联系人工具类,用于根据电话号码查询联系人姓 名
* 使用缓存机制提高查询效率,避免重复查询联系人数据库
*/
public class Contact {
// 联系人缓存,键为电话号码,值为对应的联系人姓名
private static HashMap<String, String> sContactCache;
// 日志标签
private static final String TAG = "Contact";
/**
* 联系人ID查询的SQL选择条件模板
* 该模板用于匹配电话号码并查询对应的联系人姓名
* 需要通过 replace("+", PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)) 方法替换占位符
*/
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 上下文对象用于获取ContentResolver
* @param phoneNumber 要查询的电话号码
* @return 对应的联系人姓名如果未找到则返回null
*/
public static String getContact(Context context, String phoneNumber) {
// 初始化联系人缓存(如果尚未初始化)
if(sContactCache == null) {
sContactCache = new HashMap<String, String>();
}
// 检查缓存中是否已有该电话号码的记录
if(sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber);
}
// 构建查询条件,将模板中的占位符替换为实际的最小匹配值
String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 执行联系人数据库查询
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI, // 查询的内容URI
new String [] { Phone.DISPLAY_NAME }, // 需要返回的列(联系人姓名)
selection, // 查询条件
new String[] { phoneNumber }, // 查询参数
null); // 排序方式
// 处理查询结果
if (cursor != null && cursor.moveToFirst()) {
try {
// 获取联系人姓名并加入缓存
String name = cursor.getString(0);
sContactCache.put(phoneNumber, name);
return name;
} catch (IndexOutOfBoundsException e) {
// 处理可能的索引越界异常
Log.e(TAG, " Cursor get string error " + e.toString());
return null;
} finally {
// 确保关闭Cursor资源
cursor.close();
}
} else {
// 未找到匹配的联系人记录
Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null;
}
}
}