diff --git a/src/main/java/net/micode/notes/MainActivity.java b/src/main/java/net/micode/notes/MainActivity.java
index 105fc40..8091753 100644
--- a/src/main/java/net/micode/notes/MainActivity.java
+++ b/src/main/java/net/micode/notes/MainActivity.java
@@ -1,13 +1,5 @@
-
 package net.micode.notes;
 
-/**
- * 笔记应用的主活动类，作为应用的入口点。
- * <p>
- * 该类是小米笔记应用的主活动，负责初始化应用界面和处理窗口边距设置。
- * </p>
- */
-
 import android.os.Bundle;
 
 import androidx.activity.EdgeToEdge;
@@ -18,15 +10,6 @@ import androidx.core.view.WindowInsetsCompat;
 
 public class MainActivity extends AppCompatActivity {
 
-    /**
-     * 活动创建时调用的方法，初始化应用界面和窗口设置。
-     * <p>
-     * 该方法启用了边缘到边缘显示模式，设置了活动布局，并处理了系统栏
-     * 的边距问题，确保内容不会被系统UI遮挡。
-     * </p>
-     * 
-     * @param savedInstanceState 保存的实例状态，用于恢复活动状态
-     */
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
diff --git a/src/main/java/net/micode/notes/data/Notes.java b/src/main/java/net/micode/notes/data/Notes.java
index 5d83908..4b82197 100644
--- a/src/main/java/net/micode/notes/data/Notes.java
+++ b/src/main/java/net/micode/notes/data/Notes.java
@@ -211,22 +211,29 @@ public class Notes {
         public static final String LOCAL_MODIFIED = "local_modified";
 
         /**
-         * 移动到临时文件夹之前的原始父ID
-         * <P> 类型: INTEGER </P>
+         * 原始父ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ORIGIN_PARENT_ID = "origin_parent_id";
 
         /**
-         * GTask ID
+         * GTASK ID
          * <P> 类型: TEXT </P>
          */
         public static final String GTASK_ID = "gtask_id";
 
         /**
          * 版本号
-         * <P> 类型: INTEGER (long) </P>
+         * <P> 类型: INTEGER </P>
          */
         public static final String VERSION = "version";
+
+        /**
+         * 置顶状态
+         * <P> 类型: INTEGER </P>
+         * <P> 0表示未置顶，1表示置顶 </P>
+         */
+        public static final String PINNED = "pinned";
     }
 
     public interface DataColumns {
diff --git a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
index f6b9c37..5eccfec 100644
--- a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
+++ b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
@@ -35,7 +35,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     // 数据库文件名
     private static final String DB_NAME = "note.db";
     // 数据库版本号，用于升级控制
-    private static final int DB_VERSION = 4;
+    private static final int DB_VERSION = 5;
 
     /**
      * 数据库表名常量定义
@@ -56,7 +56,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
      * 笔记表创建SQL语句
      * 包含笔记/文件夹的基本属性：ID、父文件夹ID、提醒时间、背景色、创建/修改时间等
      */
-    private static final String CREATE_NOTE_TABLE_SQL =
+    private static final String CREATE_NOTE_TABLE_SQL = 
             "CREATE TABLE " + TABLE.NOTE + "(" +
                     NoteColumns.ID + " INTEGER PRIMARY KEY," +
                     NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
@@ -74,7 +74,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
                     NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
                     NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
                     NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
-                    NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+                    NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.PINNED + " INTEGER NOT NULL DEFAULT 0" +
                     ")";
 
     /**
@@ -378,6 +379,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             oldVersion++;
         }
 
+        // 版本4升级到版本5
+        if (oldVersion == 4) {
+            upgradeToV5(db);
+            oldVersion++;
+        }
+
         // 如果需要，重新创建触发器
         if (reCreateTriggers) {
             reCreateNoteTableTriggers(db);
@@ -429,4 +436,13 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
     }
+
+    /**
+     * 升级到版本5：添加置顶字段，用于便签置顶功能
+     * @param db 数据库实例
+     */
+    private void upgradeToV5(SQLiteDatabase db) {
+        db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.PINNED
+                + " INTEGER NOT NULL DEFAULT 0");
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/net/micode/notes/model/Note.java b/src/main/java/net/micode/notes/model/Note.java
index 4c7931d..44935dd 100644
--- a/src/main/java/net/micode/notes/model/Note.java
+++ b/src/main/java/net/micode/notes/model/Note.java
@@ -260,7 +260,7 @@ public class Note {
         /**
          * 日志标签
          */
-        private static final String TAG = NoteData.class.getSimpleName();
+        private static final String TAG = "NoteData";
 
         /**
          * 构造方法，初始化笔记数据
diff --git a/src/main/java/net/micode/notes/ui/NoteItemData.java b/src/main/java/net/micode/notes/ui/NoteItemData.java
index 2ffa01d..44825ee 100644
--- a/src/main/java/net/micode/notes/ui/NoteItemData.java
+++ b/src/main/java/net/micode/notes/ui/NoteItemData.java
@@ -53,6 +53,7 @@ public class NoteItemData {
         NoteColumns.TYPE,
         NoteColumns.WIDGET_ID,
         NoteColumns.WIDGET_TYPE,
+        NoteColumns.PINNED,
     };
 
     /**
@@ -114,12 +115,22 @@ public class NoteItemData {
      * 查询结果中小组件类型列的索引
      */
     private static final int WIDGET_TYPE_COLUMN           = 11;
+    
+    /**
+     * 查询结果中置顶状态列的索引
+     */
+    private static final int PINNED_COLUMN                = 12;
 
     /**
      * 笔记ID
      */
     private long mId;
     
+    /**
+     * 置顶状态
+     */
+    private boolean mPinned;
+    
     /**
      * 提醒日期
      */
@@ -230,6 +241,7 @@ public class NoteItemData {
         mType = cursor.getInt(TYPE_COLUMN);
         mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
         mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
+        mPinned = (cursor.getInt(PINNED_COLUMN) > 0) ? true : false;
 
         mPhoneNumber = "";
         if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
@@ -447,6 +459,22 @@ public class NoteItemData {
     public boolean isCallRecord() {
         return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
     }
+    
+    /**
+     * 获取置顶状态
+     * @return 置顶状态，true表示已置顶，false表示未置顶
+     */
+    public boolean isPinned() {
+        return mPinned;
+    }
+    
+    /**
+     * 设置置顶状态
+     * @param pinned 置顶状态，true表示置顶，false表示取消置顶
+     */
+    public void setPinned(boolean pinned) {
+        mPinned = pinned;
+    }
 
     /**
      * 获取笔记类型（静态方法）
diff --git a/src/main/java/net/micode/notes/ui/NotesListActivity.java b/src/main/java/net/micode/notes/ui/NotesListActivity.java
index b72aba0..f1d9277 100644
--- a/src/main/java/net/micode/notes/ui/NotesListActivity.java
+++ b/src/main/java/net/micode/notes/ui/NotesListActivity.java
@@ -132,14 +132,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     /** 新建笔记按钮 */
     private Button mAddNewNote;
 
-    /** 是否分发触摸事件 */
-    private boolean mDispatch;
-
-    /** 原始Y坐标 */
-    private int mOriginY;
-
-    /** 分发Y坐标 */
-    private int mDispatchY;
+    // 删除不再使用的触摸事件相关变量
+    // private boolean mDispatch;
+    // private int mOriginY;
+    // private int mDispatchY;
 
     /** 标题栏文本视图 */
     private TextView mTitleBar;
@@ -152,6 +148,15 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     /** 模式回调 */
     private ModeCallback mModeCallBack;
+    
+    /** 是否分发触摸事件 */
+    private boolean mDispatch;
+    
+    /** 原始Y坐标 */
+    private int mOriginY;
+    
+    /** 分发Y坐标 */
+    private int mDispatchY;
 
     /** 日志标签 */
     private static final String TAG = "NotesListActivity";
@@ -167,7 +172,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     /** 根文件夹选择条件 */
     private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>"
-            + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)") + " OR ("
+            + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
             + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
             + NoteColumns.NOTES_COUNT + ">0)";
 
@@ -196,6 +201,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
          * Insert an introduction when user firstly use this application
          */
         setAppInfoFromRawRes();
+        
+        // 注册Android 13+的返回键回调
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.TIRAMISU) {
+            getOnBackInvokedDispatcher().registerOnBackInvokedCallback(
+                    android.window.OnBackInvokedDispatcher.PRIORITY_DEFAULT,
+                    new android.window.OnBackInvokedCallback() {
+                        @Override
+                        public void onBackInvoked() {
+                            handleBackPress();
+                        }
+                    }
+            );
+        }
     }
 
     /**
@@ -356,6 +374,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 mMoveMenu.setVisible(true);
                 mMoveMenu.setOnMenuItemClickListener(this);
             }
+            // 添加置顶菜单初始化
+            MenuItem pinMenu = menu.findItem(R.id.pin);
+            if (pinMenu != null) {
+                pinMenu.setOnMenuItemClickListener(this);
+            }
             mActionMode = mode;
             mNotesListAdapter.setChoiceMode(true);
             mNotesListView.setLongClickable(false);
@@ -515,6 +538,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 case R.id.move:
                     startQueryDestinationFolders();
                     break;
+                case R.id.pin:
+                    togglePinnedStatus();
+                    break;
                 default:
                     return false;
             }
@@ -622,7 +648,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null,
                 Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] {
                     String.valueOf(mCurrentFolderId)
-                }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
+                }, NoteColumns.PINNED + " DESC," + NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
     }
 
     /**
@@ -755,6 +781,54 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }.execute();
     }
 
+    /**
+     * 切换选中便签的置顶状态
+     */
+    private void togglePinnedStatus() {
+        final HashSet<Long> selectedIds = mNotesListAdapter.getSelectedItemIds();
+        final int selectedCount = mNotesListAdapter.getSelectedCount();
+        
+        new AsyncTask<Void, Void, Void>() {
+            protected Void doInBackground(Void... unused) {
+                for (Long noteId : selectedIds) {
+                    // 查询当前便签的置顶状态
+                    Cursor cursor = mContentResolver.query(Notes.CONTENT_NOTE_URI,
+                            new String[]{NoteColumns.PINNED},
+                            NoteColumns.ID + "=?",
+                            new String[]{String.valueOf(noteId)},
+                            null);
+                    
+                    if (cursor != null && cursor.moveToFirst()) {
+                        int currentPinned = cursor.getInt(0);
+                        // 切换置顶状态
+                        int newPinned = currentPinned == 1 ? 0 : 1;
+                        
+                        ContentValues values = new ContentValues();
+                        values.put(NoteColumns.PINNED, newPinned);
+                        
+                        mContentResolver.update(Notes.CONTENT_NOTE_URI,
+                                values,
+                                NoteColumns.ID + "=?",
+                                new String[]{String.valueOf(noteId)});
+                        
+                        cursor.close();
+                    }
+                }
+                return null;
+            }
+
+            @Override
+            protected void onPostExecute(Void unused) {
+                Toast.makeText(NotesListActivity.this, 
+                        "已更新 " + selectedCount + " 个便签",
+                        Toast.LENGTH_SHORT).show();
+                // 重新查询数据，更新列表
+                startAsyncNotesListQuery();
+                mModeCallBack.finishActionMode();
+            }
+        }.execute();
+    }
+
     /**
      * 删除文件夹
      * <p>
@@ -991,8 +1065,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
      * 3. 如果在根文件夹中，调用默认的返回处理
      * </p>
      */
-    @Override
-    public void onBackPressed() {
+    private void handleBackPress() {
         switch (mState) {
             case SUB_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
@@ -1015,6 +1088,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
     }
 
+    @Override
+    public void onBackPressed() {
+        handleBackPress();
+    }
+
     /**
      * 更新部件
      * <p>
diff --git a/src/main/res/layout/note_edit.xml b/src/main/res/layout/note_edit.xml
index 10b2aa7..e0cf16b 100644
--- a/src/main/res/layout/note_edit.xml
+++ b/src/main/res/layout/note_edit.xml
@@ -19,6 +19,7 @@
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:background="@drawable/list_background"
+    android:fitsSystemWindows="true"
     xmlns:android="http://schemas.android.com/apk/res/android">
 
     <LinearLayout
@@ -81,7 +82,8 @@
                 android:scrollbars="none"
                 android:overScrollMode="never"
                 android:layout_gravity="left|top"
-                android:fadingEdgeLength="0dip">
+                android:fadingEdgeLength="0dip"
+                android:paddingTop="16dp">
 
                 <LinearLayout
                     android:layout_width="fill_parent"
diff --git a/src/main/res/layout/note_list.xml b/src/main/res/layout/note_list.xml
index 6b25d38..21eb34b 100644
--- a/src/main/res/layout/note_list.xml
+++ b/src/main/res/layout/note_list.xml
@@ -19,7 +19,8 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
-    android:background="@drawable/list_background">
+    android:background="@drawable/list_background"
+    android:fitsSystemWindows="true">
 
     <LinearLayout
         android:layout_width="fill_parent"
@@ -54,5 +55,6 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:focusable="false"
-        android:layout_gravity="bottom" />
+        android:layout_gravity="bottom"
+        android:layout_marginBottom="16dp" />
 </FrameLayout>
diff --git a/src/main/res/menu/note_list_options.xml b/src/main/res/menu/note_list_options.xml
index daac008..749aa3e 100644
--- a/src/main/res/menu/note_list_options.xml
+++ b/src/main/res/menu/note_list_options.xml
@@ -28,4 +28,9 @@
         android:title="@string/menu_delete"
         android:icon="@drawable/menu_delete"
         android:showAsAction="always|withText" />
+        
+    <item
+        android:id="@+id/pin"
+        android:title="@string/menu_pin"
+        android:showAsAction="always|withText" />
 </menu>
\ No newline at end of file
diff --git a/src/main/res/values-zh-rCN/strings.xml b/src/main/res/values-zh-rCN/strings.xml
index 09f75ed..6039b43 100644
--- a/src/main/res/values-zh-rCN/strings.xml
+++ b/src/main/res/values-zh-rCN/strings.xml
@@ -44,6 +44,8 @@
     <string name="menu_search">搜索</string>
     <string name="menu_delete">删除</string>
     <string name="menu_move">移动到文件夹</string>
+    <string name="menu_pin">置顶</string>
+    <string name="menu_unpin">取消置顶</string>
     <string name="menu_select_title">选中了 %d 项</string>
     <string name="menu_select_none">没有选中项，操作无效</string>
     <string name="menu_select_all">全选</string>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 55df868..02d3841 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -48,6 +48,8 @@
     <string name="menu_search">Search</string>
     <string name="menu_delete">Delete</string>
     <string name="menu_move">Move to folder</string>
+    <string name="menu_pin">Pin</string>
+    <string name="menu_unpin">Unpin</string>
     <string name="menu_select_title">%d selected</string>
     <string name="menu_select_none">Nothing selected, the operation is invalid</string>
     <string name="menu_select_all">Select all</string>