diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml
index 70fa128..6219318 100644
--- a/src/main/AndroidManifest.xml
+++ b/src/main/AndroidManifest.xml
@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-
 <!-- Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 
      Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/src/main/java/net/micode/notes/ui/NotesListActivity.java b/src/main/java/net/micode/notes/ui/NotesListActivity.java
index f7eacd3..0ad2290 100644
--- a/src/main/java/net/micode/notes/ui/NotesListActivity.java
+++ b/src/main/java/net/micode/notes/ui/NotesListActivity.java
@@ -564,6 +564,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
     }
 
+    /**
+     * @Method      showSoftInput
+     * @Date        2023/12/17 23:46
+     * @Author      lenovo
+     * @Return      void
+     * @Description 显示软键盘
+     */
     private void showSoftInput() {
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         if (inputMethodManager != null) {
@@ -576,15 +583,23 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
     }
 
-    // TODO add comments of this method
+    /**
+     * @Method      showCreateOrModifyFolderDialog
+     * @Date        2023/12/17 22:32
+     * @param 		create true为创建新文件夹， false为修改文件夹的名字
+     * @Author      lenovo
+     * @Return      void
+     * @Description 新建或修改文件夹名字
+     */
     private void showCreateOrModifyFolderDialog(final boolean create) {
+        // final 关键字, 初始化之后无法修改 (const)
         final AlertDialog.Builder builder = new AlertDialog.Builder(this);
         View view = LayoutInflater.from(this).inflate(R.layout.dialog_edit_text, null);
         final EditText etName = (EditText) view.findViewById(R.id.et_foler_name);
         showSoftInput();
         if (!create) {
             if (mFocusNoteDataItem != null) {
-                etName.setText(mFocusNoteDataItem.getSnippet());
+                etName.setText(mFocusNoteDataItem.getSnippet()); // 显示之前的名称
                 builder.setTitle(getString(R.string.menu_folder_change_name));
             } else {
                 Log.e(TAG, "The long click data item is null");
@@ -594,7 +609,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             etName.setText("");
             builder.setTitle(this.getString(R.string.menu_create_folder));
         }
-
+        /**
+         * 正按钮 OK 无监听器
+         *  负按钮 Cancel 隐藏软键盘
+         * lenovo 2023/12/18 0:03
+        */
         builder.setPositiveButton(android.R.string.ok, null);
         builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int which) {
@@ -608,10 +627,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             public void onClick(View v) {
                 hideSoftInput(etName);
                 String name = etName.getText().toString();
+                // 如果该名称已经存在
                 if (DataUtils.checkVisibleFolderName(mContentResolver, name)) {
+                    // 提示 exist, please rename
                     Toast.makeText(NotesListActivity.this, getString(R.string.folder_exist, name),
                             Toast.LENGTH_LONG).show();
-                    etName.setSelection(0, etName.length());
+                    etName.setSelection(0, etName.length()); //全选输入文件名（准备修改/删除)
                     return;
                 }
                 if (!create) {
@@ -724,6 +745,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         super.onContextMenuClosed(menu);
     }
 
+    /**
+     * @Method      onContextItemSelected
+     * @Date        2023/12/17 23:51
+     * @param 		item
+     * @Author      lenovo
+     * @Return      boolean
+     * @Description 长按文件夹之后显示的文件夹菜单对应的后台程序
+     */
     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (mFocusNoteDataItem == null) {
@@ -776,6 +805,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         return true;
     }
 
+    /**
+     * @Method      onOptionsItemSelected
+     * @Date        2023/12/17 23:49
+     * @param 		 item
+     * @Author      lenovo
+     * @Return      boolean
+     * @Description 主界面菜单对应的后台程序
+     */
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         int itemId = item.getItemId();