diff --git a/limin---源代码分析/AlarmAlertActivity.java b/limin---源代码分析/AlarmAlertActivity.java
index 716df9c..73c908d 100644
--- a/limin---源代码分析/AlarmAlertActivity.java
+++ b/limin---源代码分析/AlarmAlertActivity.java
@@ -24,7 +24,7 @@ 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.MediaPlayer;//导入MediaPlayer类
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Bundle;