diff --git a/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java b/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
index 2b18f9e..c23280e 100644
--- a/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
+++ b/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
@@ -116,43 +116,39 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
             mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
         }
         try {
-            mPlayer.setDataSource(this, url);// 设置媒体放器的数据源为闹钟铃声的URI
-            mPlayer.prepare();
-            mPlayer.setLooping(true);
-            mPlayer.start();
-        } catch (IllegalArgumentException e) {
-            // TODO Auto-generated catch block
+            mPlayer.setDataSource(this, url); // 设置媒体放器的数据源为闹钟铃声的URI
+            mPlayer.prepare(); // 准备异步播放
+            mPlayer.setLooping(true); // 设置循环播放
+            mPlayer.start(); // 开始播放
+        } catch (IllegalArgumentException e) { // 处理参数异常
             e.printStackTrace();
-        } catch (SecurityException e) {
-            // TODO Auto-generated catch block
+        } catch (SecurityException e) { // 处理安全异常
             e.printStackTrace();
-        } catch (IllegalStateException e) {
-            // TODO Auto-generated catch block
+        } catch (IllegalStateException e) { // 处理状态异常
             e.printStackTrace();
-        } catch (IOException e) {
-            // TODO Auto-generated catch block
+        } catch (IOException e) { // 处理IO异常
             e.printStackTrace();
         }
     }
 
     private void showActionDialog() {
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
-        dialog.setTitle(R.string.app_name);
-        dialog.setMessage(mSnippet);
-        dialog.setPositiveButton(R.string.notealert_ok, this);
-        if (isScreenOn()) {
-            dialog.setNegativeButton(R.string.notealert_enter, this);
+        dialog.setTitle(R.string.app_name); // 设置对话框标题
+        dialog.setMessage(mSnippet); // 设置对话框消息内容
+        dialog.setPositiveButton(R.string.notealert_ok, this); // 设置对话框的确定按钮和点击事件
+        if (isScreenOn()) { // 判断屏幕是否亮屏
+            dialog.setNegativeButton(R.string.notealert_enter, this); // 设置对话框的取消按钮和点击事件
         }
-        dialog.show().setOnDismissListener(this);
+        dialog.show().setOnDismissListener(this); // 显示对话框，并设置对话框消失时的监听器
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_NEGATIVE:
-                Intent intent = new Intent(this, NoteEditActivity.class);
-                intent.setAction(Intent.ACTION_VIEW);
-                intent.putExtra(Intent.EXTRA_UID, mNoteId);
-                startActivity(intent);
+                Intent intent = new Intent(this, NoteEditActivity.class); // 创建一个Intent对象，跳转到NoteEditActivity
+                intent.setAction(Intent.ACTION_VIEW); // 设置Intent的操作为查看操作
+                intent.putExtra(Intent.EXTRA_UID, mNoteId); // 设置Intent的额外数据
+                startActivity(intent); // 启动Activity
                 break;
             default:
                 break;
@@ -160,15 +156,14 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
     }
 
     public void onDismiss(DialogInterface dialog) {
-        stopAlarmSound();
-        finish();
+        stopAlarmSound(); // 停止播放铃声
+        finish(); // 结束当前Activity
     }
-
     private void stopAlarmSound() {
         if (mPlayer != null) {
-            mPlayer.stop();
-            mPlayer.release();
-            mPlayer = null;
+            mPlayer.stop(); // 停止播放
+            mPlayer.release(); // 释放资源
+            mPlayer = null; // 置空
         }
     }
 }