diff --git a/AlarmReceiver.java b/AlarmReceiver.java
new file mode 100644
index 0000000..c692e17
--- /dev/null
+++ b/AlarmReceiver.java
@@ -0,0 +1,35 @@
+/*
+ * 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.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+// AlarmReceiver 类继承自 BroadcastReceiver，用于接收便签提醒的广播事件。
+public class AlarmReceiver extends BroadcastReceiver {
+    // onReceive 方法是 BroadcastReceiver 的回调方法，当接收到广播时被调用。
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // 设置 intent 的目标类为 AlarmAlertActivity。
+        intent.setClass(context, AlarmAlertActivity.class);
+        // 为 intent 添加 FLAG_ACTIVITY_NEW_TASK 标志，使得在新的任务栈中启动 Activity。
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // 在给定的上下文中启动 AlarmAlertActivity。
+        context.startActivity(intent);
+    }
+}
\ No newline at end of file