diff --git a/src/DropdownMenu.java b/src/DropdownMenu.java
deleted file mode 100644
index 40f2f00..0000000
--- a/src/DropdownMenu.java
+++ /dev/null
@@ -1,106 +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.ui;
-
-import android.content.Context;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.View.OnClickListener;
-import android.widget.Button;
-import android.widget.PopupMenu;
-import android.widget.PopupMenu.OnMenuItemClickListener;
-
-import net.micode.notes.R;
-
-
-/**
- * @projectName（项目名称）: xiaomi label
- * @package（包）: ui
- * @className（类名称）: DropdownMenu
- * @description（类描述）: 声明一个下拉菜单
- * @author（创建人）: zhangchaoqun
- * @createDate（创建时间）: datetime
- * @updateUser（修改人）: user
- * @updateDate（修改时间）: datetime
- * @updateRemark（修改备注）: 说明本次修改内容
- * @version（版本）: v1.0
- */
-public class DropdownMenu {
-    private Button mButton;
-    //声明一个下拉菜单
-    private PopupMenu mPopupMenu;
-    private Menu mMenu;
-
-
-    /**
-     * @description 描述:将菜单私有变量实例化
-     * @param 参数1:context（上下文）
-     * @param 参数2:button（按钮）
-     * @param 参数3:menuId（菜单id）
-     * @return 返回值:创建一个DropdownMenu实例对象
-     * @author zhangchaoqun
-     */
-    public DropdownMenu(Context context, Button button, int menuId) {
-        mButton = button;
-        //设置这个view的背景
-        mButton.setBackgroundResource(R.drawable.dropdown_icon);
-        mPopupMenu = new PopupMenu(context, mButton);
-        mMenu = mPopupMenu.getMenu();
-        //MenuInflater是用来实例化Menu目录下的Menu布局文件
-        //根据ID来确认menu的内容选项
-        mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
-        mButton.setOnClickListener(new OnClickListener() {
-            public void onClick(View v) {
-                mPopupMenu.show();
-            }
-        });
-    }
-
-
-    /**
-     * @description 描述:对非空的菜单的具体条目设置监听
-     * @param 参数1:listener
-     * @param 参数2:
-     * @param 参数3:
-     * @return 返回值:void
-     * @author zhangchaoqun
-     */
-    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
-        if (mPopupMenu != null) {
-            mPopupMenu.setOnMenuItemClickListener(listener);
-        }
-    }
-
-    //对于菜单选项的初始化，根据索引搜索菜单需要的选项
-    public MenuItem findItem(int id) {
-        return mMenu.findItem(id);
-    }
-
-
-    /**
-     * @description 描述:设置按钮的标题文本信息
-     * @param 参数1:title（接口CharSequence的实例对象），其实就是描述了一个string对象
-     * @param 参数2:
-     * @param 参数3:
-     * @return 返回值:
-     * @author zhangchaoqun
-     */
-    public void setTitle(CharSequence title) {
-        mButton.setText(title);
-    }
-}