diff --git a/src/NoteWidgetProvider.java b/src/NoteWidgetProvider.java
new file mode 100644
index 0000000..5ed9cd6
--- /dev/null
+++ b/src/NoteWidgetProvider.java
@@ -0,0 +1,163 @@
+/*
+ * 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;
+// 导入所需的Android类和接口
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.util.Log;
+import android.widget.RemoteViews;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.ui.NoteEditActivity;
+import net.micode.notes.ui.NotesListActivity;
+
+// 定义一个抽象类NoteWidgetProvider，继承自AppWidgetProvider
+public abstract class NoteWidgetProvider extends AppWidgetProvider {
+    // 定义查询数据库时需要的列
+    public static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.BG_COLOR_ID,
+        NoteColumns.SNIPPET
+    };
+
+    // 定义列的索引
+    public static final int COLUMN_ID           = 0;
+    public static final int COLUMN_BG_COLOR_ID  = 1;
+    public static final int COLUMN_SNIPPET      = 2;
+
+    // 定义日志标签
+    private static final String TAG = "NoteWidgetProvider";
+
+    // 当小部件被删除时调用
+    @Override
+    public void onDeleted(Context context, int[] appWidgetIds) {
+        // 更新数据库，将被删除小部件的WIDGET_ID设置为无效
+        ContentValues values = new ContentValues();
+        values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
+        for (int i = 0; i < appWidgetIds.length; i++) {
+            context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
+                    values,
+                    NoteColumns.WIDGET_ID + "=?",
+                    new String[] { String.valueOf(appWidgetIds[i])});
+        }
+    }
+
+    // 获取小部件的笔记信息
+    private Cursor getNoteWidgetInfo(Context context, int widgetId) {
+        return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
+                new String[] { String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER) },
+                null);
+    }
+
+    // 更新小部件
+    protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        update(context, appWidgetManager, appWidgetIds, false);
+    }
+
+    // 更新小部件，可以设置隐私模式
+    private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
+            boolean privacyMode) {
+        for (int i = 0; i < appWidgetIds.length; i++) {
+            if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
+                // 默认背景ID
+                int bgId = ResourceParser.getDefaultBgId(context);
+                // 笔记摘要
+                String snippet = "";
+                // 编辑笔记的Intent
+                Intent intent = new Intent(context, NoteEditActivity.class);
+                intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
+                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
+
+                // 获取笔记信息的Cursor
+                Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
+                if (c != null && c.moveToFirst()) {
+                    if (c.getCount() > 1) {
+                        // 如果有多个相同的widget id，记录错误并返回
+                        Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
+                        c.close();
+                        return;
+                    }
+                    // 获取笔记摘要和背景ID
+                    snippet = c.getString(COLUMN_SNIPPET);
+                    bgId = c.getInt(COLUMN_BG_COLOR_ID);
+                    intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
+                    intent.setAction(Intent.ACTION_VIEW);
+                } else {
+                    // 如果没有找到笔记，显示默认文本
+                    snippet = context.getResources().getString(R.string.widget_havenot_content);
+                    intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+                }
+
+                // 关闭Cursor
+                if (c != null) {
+                    c.close();
+                }
+
+                // 创建RemoteViews对象
+                RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
+                // 设置背景资源
+                rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
+                // 将背景ID放入Intent
+                intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
+                /**
+                 * 生成PendingIntent，用于启动宿主Activity
+                 */
+                PendingIntent pendingIntent = null;
+                if (privacyMode) {
+                    // 如果是隐私模式，显示隐私模式文本
+                    rv.setTextViewText(R.id.widget_text,
+                            context.getString(R.string.widget_under_visit_mode));
+                    // 创建PendingIntent，用于启动NotesListActivity
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
+                            context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
+                } else {
+                    // 显示笔记摘要
+                    rv.setTextViewText(R.id.widget_text, snippet);
+                    // 创建PendingIntent，用于启动NoteEditActivity
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
+                            PendingIntent.FLAG_UPDATE_CURRENT);
+                }
+
+                // 设置点击事件
+                rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
+                // 更新小部件
+                appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
+            }
+        }
+    }
+
+    // 获取背景资源ID的方法，需要子类实现
+    protected abstract int getBgResourceId(int bgId);
+
+    // 获取布局资源ID的方法，需要子类实现
+    protected abstract int getLayoutId();
+
+    // 获取小部件类型的方法，需要子类实现
+    protected abstract int getWidgetType();
+}
\ No newline at end of file
diff --git a/src/NoteWidgetProvider_2x.java b/src/NoteWidgetProvider_2x.java
new file mode 100644
index 0000000..5535989
--- /dev/null
+++ b/src/NoteWidgetProvider_2x.java
@@ -0,0 +1,55 @@
+/*
+ * 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;
+
+// 定义一个具体的NoteWidgetProvider_2x类，继承自NoteWidgetProvider
+public class NoteWidgetProvider_2x extends NoteWidgetProvider {
+    // 当小部件需要更新时调用
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        // 调用父类的update方法进行更新
+        super.update(context, appWidgetManager, appWidgetIds);
+    }
+
+    // 获取小部件的布局资源ID
+    @Override
+    protected int getLayoutId() {
+        // 返回2x小部件的布局资源ID
+        return R.layout.widget_2x;
+    }
+
+    // 获取小部件的背景资源ID
+    @Override
+    protected int getBgResourceId(int bgId) {
+        // 根据传入的背景ID，返回对应的2x小部件背景资源ID
+        return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
+    }
+
+    // 获取小部件的类型
+    @Override
+    protected int getWidgetType() {
+        // 返回小部件的类型，这里是2x类型的笔记小部件
+        return Notes.TYPE_WIDGET_2X;
+    }
+}
\ No newline at end of file
diff --git a/src/NoteWidgetProvider_4x.java b/src/NoteWidgetProvider_4x.java
new file mode 100644
index 0000000..bf302c3
--- /dev/null
+++ b/src/NoteWidgetProvider_4x.java
@@ -0,0 +1,55 @@
+/*
+ * 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;
+
+// 定义一个具体的NoteWidgetProvider_4x类，继承自NoteWidgetProvider
+public class NoteWidgetProvider_4x extends NoteWidgetProvider {
+    // 当小部件需要更新时调用
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        // 调用父类的update方法进行更新
+        super.update(context, appWidgetManager, appWidgetIds);
+    }
+
+    // 获取小部件的布局资源ID
+    @Override
+    protected int getLayoutId() {
+        // 返回4x小部件的布局资源ID
+        return R.layout.widget_4x;
+    }
+
+    // 获取小部件的背景资源ID
+    @Override
+    protected int getBgResourceId(int bgId) {
+        // 根据传入的背景ID，返回对应的4x小部件背景资源ID
+        return ResourceParser.WidgetBgResources.getWidget4xBgResource(bgId);
+    }
+
+    // 获取小部件的类型
+    @Override
+    protected int getWidgetType() {
+        // 返回小部件的类型，这里是4x类型的笔记小部件
+        return Notes.TYPE_WIDGET_4X;
+    }
+}
\ No newline at end of file