diff --git a/src/Contact.java b/src/Contact.java
deleted file mode 100644
index 90de20e..0000000
--- a/src/Contact.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * 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;
-/**
- * 联系人工具类，用于通过电话号码查询联系人姓名，并支持缓存机制
- */
-public class Contact {
-    // 联系人缓存（电话号码 -> 联系人姓名）
-
-    private static HashMap<String, String> sContactCache;
-    private static final String TAG = "Contact"; // 日志标签
-
-    // 查询条件模板，用于匹配电话号码对应的联系人
-    private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER// 电话号码匹配函数
-
-            + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" // 限制为电话类型数据
-
-            + " AND " + Data.RAW_CONTACT_ID + " IN "
-            + "(SELECT raw_contact_id "  // 原始联系人ID筛选
-
-            + " FROM phone_lookup"
-            + " WHERE min_match = '+')"; // 匹配最小匹配规则
-
-
-
-
-    /**
-     * 通过电话号码获取联系人姓名（带缓存）
-     * @param context 上下文对象
-     * @param phoneNumber 要查询的电话号码
-     * @return 对应的联系人姓名，未找到返回null
-     */
-    public static String getContact(Context context, String phoneNumber) {
-        // 初始化缓存（首次调用时）
-        if(sContactCache == null) {
-            sContactCache = new HashMap<String, String>();
-        }
-        // 缓存命中直接返回
-        if(sContactCache.containsKey(phoneNumber)) {
-            return sContactCache.get(phoneNumber);
-        }
-        // 动态构建查询条件（替换模板中的占位符）
-        String selection = CALLER_ID_SELECTION.replace("+",
-                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
-        // 执行内容提供者查询
-        Cursor cursor = context.getContentResolver().query(
-                Data.CONTENT_URI,  // 查询URI（联系人数据表）
-                new String [] { Phone.DISPLAY_NAME },// 查询字段（显示名称）
-                selection,// 筛选条件
-                new String[] { phoneNumber },// 参数占位符值
-
-                null);   // 排序方式
-        // 处理查询结果
-        if (cursor != null && cursor.moveToFirst()) {
-            try {
-                // 获取第一条结果的显示名称
-                String name = cursor.getString(0);
-                sContactCache.put(phoneNumber, name);// 存入缓存
-                return name;
-            } catch (IndexOutOfBoundsException e) {
-                // 异常处理（列索引越界）
-                Log.e(TAG, " Cursor get string error " + e.toString());
-                return null;
-            } finally {
-                // 确保关闭游标释放资源
-                cursor.close();
-            }
-        } else {
-            // 未找到匹配联系人
-            Log.d(TAG, "No contact matched with number:" + phoneNumber);
-            return null;
-        }
-    }
-}