diff --git a/NoteWidgetProvider_2x.java b/NoteWidgetProvider_2x.java
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+++ b/NoteWidgetProvider_2x.java
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+/*
+ * 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.widget;
+
+import android.appwidget.AppWidgetManager;
+import android.content.Context;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.ResourceParser;
+
+// NoteWidgetProvider_2x 是 NoteWidgetProvider 的具体实现类，用于提供2x2网格大小的便签小部件。
+public class NoteWidgetProvider_2x extends NoteWidgetProvider {
+    // 当小部件需要更新时调用此方法。
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        // 调用父类的 update 方法来执行更新。
+        super.update(context, appWidgetManager, appWidgetIds);
+    }
+
+    // 返回小部件的布局资源ID。
+    @Override
+    protected int getLayoutId() {
+        // 返回2x2网格小部件的布局资源ID。
+        return R.layout.widget_2x;
+    }
+
+    // 根据传入的背景ID返回对应的资源ID。
+    @Override
+    protected int getBgResourceId(int bgId) {
+        // 使用 ResourceParser 类的静态方法来获取2x2网格小部件的背景资源ID。
+        return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
+    }
+
+    // 返回小部件的类型。
+    @Override
+    protected int getWidgetType() {
+        // 返回小部件的类型为TYPE_WIDGET_2X，这是一个定义在Notes类中的常量。
+        return Notes.TYPE_WIDGET_2X;
+    }
+}
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