diff --git a/src/AlarmAlertActivity.java b/src/AlarmAlertActivity.java
new file mode 100644
index 0000000..4f24d08
--- /dev/null
+++ b/src/AlarmAlertActivity.java
@@ -0,0 +1,276 @@
+/*
+ * 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.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.DialogInterface.OnDismissListener;
+import android.content.Intent;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.view.Window;
+import android.view.WindowManager;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+
+import java.io.IOException;
+
+
+/**
+ * @projectName（项目名称）: xiaomi label
+ * @package（包）: ui
+ * @className（类名称）: AlarmAlertActivity
+ * @description（类描述）: 继承了Activity类，该类实现了OnClickListener和 OnDismissListener两个接口，其中OnClickListener接口用来监听点击事件，OnDismissListener接口用来监听关闭对话框事件
+ * @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 AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
+    private long mNoteId;//文本在数据库存储中的ID号
+    private String mSnippet;//闹钟提示时出现的文本片段
+    private static final int SNIPPET_PREW_MAX_LEN = 60;
+    MediaPlayer mPlayer;
+
+
+    /**
+     * @description 描述: 消息响应函数，是用来“表示一个窗口正在生成”，这部分就是弹出对话框，播放闹铃
+     * @param 参数1:savedInstanceState
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        //从onCreate的参数savedInsanceState中获得状态数据
+        super.onCreate(savedInstanceState);
+        //界面显示——无标题
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+
+        final Window win = getWindow();
+        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+
+        if (!isScreenOn()) {
+            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+                    //保持窗体点亮
+                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    //将窗体点亮
+                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    //允许窗体点亮时锁屏
+                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
+                    //在手机锁屏后如果到了闹钟提示时间，点亮屏幕
+        }
+
+        Intent intent = getIntent();
+
+        try {
+            /*
+             *根据ID从数据库中获取标签的内容
+             * getContentResolver（）是实现数据共享，实例存储
+             */
+            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            //判断标签片段是否达到符合长度
+            mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
+                    SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
+                    : mSnippet;
+        } catch (IllegalArgumentException e) {
+            e.printStackTrace();
+            return;
+        }
+        /*
+        try
+        {
+        	// 代码区
+        }
+        catch(Exception e)
+        {
+        	// 异常处理
+        }
+        代码区如果有错误，就会返回所写异常的处理。*/
+
+        mPlayer = new MediaPlayer();
+        if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+            //弹出对话框
+            showActionDialog();
+            //闹钟提示音激发
+            playAlarmSound();
+        } else {
+            //完成闹钟动作
+            finish();
+        }
+    }
+
+
+    /**
+     * @description 描述:定义了一个布尔类型的函数isScreen（）返回屏幕是否是亮的
+     * @param 参数1:
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:bool 判断屏幕是否亮起
+     * @author zhangchaoqun
+     */
+    private boolean isScreenOn() {
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        return pm.isScreenOn();
+    }
+
+
+    /**
+     * @description 描述:定义了一个播放铃声的函数playAlarmSound
+     * @param 参数1:
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    private void playAlarmSound() {
+        //调用系统的铃声管理URI，得到闹钟提示音
+        Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
+
+        int silentModeStreams = Settings.System.getInt(getContentResolver(),
+                Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
+
+        if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
+            mPlayer.setAudioStreamType(silentModeStreams);
+        } else {
+            mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
+        }
+        try {
+            //setDataSource(Context context, Uri uri)，无返回值，设置多媒体数据来源【根据 Uri】
+            mPlayer.setDataSource(this, url);
+            //准备同步
+            mPlayer.prepare();
+            //设置是否循环播放
+            mPlayer.setLooping(true);
+            //开始播放
+            mPlayer.start();
+        } catch (IllegalArgumentException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (SecurityException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IllegalStateException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+    }
+
+
+    /**
+     * @description 描述:定义了一个显示动作窗口函数showActionDialog
+     * @param 参数1:
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    private void showActionDialog() {
+        //创建一个AlertDialog，要用到AlertDialog.Builder中的create()方法
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        //为对话框设置标题
+        dialog.setTitle(R.string.app_name);
+        //为对话框设置内容
+        dialog.setMessage(mSnippet);
+        dialog.setPositiveButton(R.string.notealert_ok, this);
+        if (isScreenOn()) {
+            dialog.setNegativeButton(R.string.notealert_enter, this);
+        }
+        dialog.show().setOnDismissListener(this);
+    }
+
+
+    /**
+     * @description 描述:定义一个onClick函数用来处理鼠标点击事件
+     * @param 参数1:dialog 对话框
+     * @param 参数2:which 定位
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    public void onClick(DialogInterface dialog, int which) {
+        switch (which) {
+            //取消操作
+            case DialogInterface.BUTTON_NEGATIVE:
+                //实现两个类间的数据传输
+                Intent intent = new Intent(this, NoteEditActivity.class);
+                //设置动作属性
+                intent.setAction(Intent.ACTION_VIEW);
+                //实现key-value对
+                //EXTRA_UID为key；mNoteId为键
+                intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                //开始动作
+                startActivity(intent);
+                break;
+            //确定操作
+            default:
+                break;
+        }
+    }
+
+
+    /**
+     * @description 描述:窗口关闭监听器接口
+     * @param 参数1:dialog
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    public void onDismiss(DialogInterface dialog) {
+        //停止闹钟声音
+        stopAlarmSound();
+        //完成该动作
+        finish();
+    }
+
+
+    /**
+     * @description 描述:关闭闹钟铃声
+     * @param 参数1:
+     * @param 参数2:
+     * @param 参数3:
+     * @return 返回值:void
+     * @author zhangchaoqun
+     */
+    private void stopAlarmSound() {
+        if (mPlayer != null) {
+            //停止播放
+            mPlayer.stop();
+            //释放MediaPlayer对象
+            mPlayer.release();
+            mPlayer = null;
+        }
+    }
+}