diff --git a/src%3F周希奥代码注释/AlarmReceiver.java b/src%3F周希奥代码注释/AlarmReceiver.java
new file mode 100644
index 0000000..62aa691
--- /dev/null
+++ b/src%3F周希奥代码注释/AlarmReceiver.java
@@ -0,0 +1,20 @@
+package net.micode.notes.ui;
+ 
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+ 
+public class AlarmReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        intent.setClass(context, AlarmAlertActivity.class);  
+        //启动AlarmAlertActivity
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        //activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈
+        //所以要新起一个栈装入启动的activity
+        context.startActivity(intent);
+    }
+}
+//这是实现alarm这个功能最接近用户层的包，基于上面的两个包，
+//作用还需要深究但是对于setClass和addFlags的
+ 
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