diff --git a/app.apk b/app.apk
index 35d4e4b..83413d2 100644
Binary files a/app.apk and b/app.apk differ
diff --git a/main/AndroidManifest.xml b/main/AndroidManifest.xml
index ac9ef3d..0c20d15 100644
--- a/main/AndroidManifest.xml
+++ b/main/AndroidManifest.xml
@@ -44,9 +44,9 @@
             android:label="收藏夹"
             android:parentActivityName=".MainActivity"/>
         <activity
-            android:name=".SettingsActivity"
-            android:label="设置"
+            android:name=".SettingsActivity"            
             android:icon="@android:drawable/ic_menu_preferences"
+            android:label="设置"
             android:parentActivityName=".MainActivity"/>
     </application>
 
diff --git a/main/assets/about.htm b/main/assets/about.htm
index 95677b0..1d74fd6 100644
--- a/main/assets/about.htm
+++ b/main/assets/about.htm
@@ -23,7 +23,7 @@ p { text-indent:2em; }
 <p><a href="https://stackoverflow.com/questions/3462582/display-the-android-webviews-favicon" target="_blank">获取网页图标</a></p>
 <p><a href="https://www.jianshu.com/p/c9a18050a249" target="_blank">字符串转Bitmap</a></p>
 <h3>更新日志：</h3>
-<h3>V4.29 (2023-02-22)</h3><ol><li>收藏夹增加分类。</li><li>修改导出HTML和CSV方法。</li></ol>
+<h3>V4.29 (2023-02-26)</h3><ol><li>收藏夹增加分类。</li><li>收藏夹分类的修改和删除。</li><li>修改导出HTML和CSV方法。</li></ol>
 <h3>V4.28 (2022-11-07)</h3><ol><li>资源探查脚本支持返回多个对象。<br>分类标题增加数量。<br>使用 &lt;details&gt; 代替 &lt;div&gt;，分类可折叠。</li></ol>
 <h3>V4.27 (2022-10-22)</h3><ol><li>修改收藏夹数据库目录。</li><li>收藏夹增加分享数据库功能。</li></ol>
 <h3>V4.26 (2022-07-23)</h3><ol><li>增加页面信息。</li><li>增加资源探查。</li></ol>
diff --git a/main/java/com/hty/browser/FavoriteActivity.java b/main/java/com/hty/browser/FavoriteActivity.java
index e112a70..8083cf9 100644
--- a/main/java/com/hty/browser/FavoriteActivity.java
+++ b/main/java/com/hty/browser/FavoriteActivity.java
@@ -113,7 +113,7 @@ public class FavoriteActivity extends Activity {
 
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
-        String[] sm = { "新建分类", "分享数据库", "导出HTML", "导出CSV" };
+        String[] sm = { "新建分类", "分类管理", "分享数据库", "导出HTML", "导出CSV" };
         for (int i=0; i<sm.length; i++) {
             menu.add(0, i, i, sm[i]);
         }
@@ -142,6 +142,8 @@ public class FavoriteActivity extends Activity {
                             helper.insert("category", values);
                             IMM.hideSoftInputFromWindow(editText1.getWindowToken(), 0);
                             genCategory();
+                            RadioButton radioButton = (RadioButton) radioGroup.getChildAt(0);
+                            radioButton.performClick();
                         } else {
                             Toast.makeText(getApplicationContext(), "分类已存在", Toast.LENGTH_SHORT).show();
                         }
@@ -151,6 +153,53 @@ public class FavoriteActivity extends Activity {
                 builder.create().show();
                 break;
             case 1:
+                builder = new AlertDialog.Builder(FavoriteActivity.this);
+                builder.setIcon(android.R.drawable.ic_menu_edit);
+                RadioButton radioButton = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());
+                if (radioButton == null)
+                    break;
+                final String title = radioButton.getText().toString();
+                if (title.equals("无分类"))
+                    break;
+                builder.setTitle(title);
+                final EditText editText_rename = new EditText(FavoriteActivity.this);
+                editText_rename.setText(title);
+                editText_rename.setSelection(title.length());
+                builder.setView(editText_rename);
+                builder.setPositiveButton("重命名", new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        DBHelper helper = new DBHelper(getApplicationContext());
+                        SQLiteDatabase db = helper.getWritableDatabase();
+                        ContentValues values = new ContentValues();
+                        String category = editText_rename.getText().toString();
+                        values.put("category", category);
+                        db.update("category", values, "category = '" + title + "'", null);
+                        db.update(helper.TableName, values, "category = '" + title + "'", null);
+                        genCategory();
+                        RadioButton radioButton = (RadioButton) radioGroup.getChildAt(0);
+                        radioButton.performClick();
+                        IMM.hideSoftInputFromWindow(editText_rename.getWindowToken(), 0);
+                    }
+                });
+                builder.setNeutralButton("删除", new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        DBHelper helper = new DBHelper(getApplicationContext());
+                        SQLiteDatabase db = helper.getWritableDatabase();
+                        db.delete("category", "category=?", new String[] { title });
+                        ContentValues values = new ContentValues();
+                        values.put("category", "");
+                        db.update(helper.TableName, values, "category = '" + title + "'", null);
+                        genCategory();
+                        RadioButton radioButton = (RadioButton) radioGroup.getChildAt(0);
+                        radioButton.performClick();
+                    }
+                });
+                builder.setNegativeButton("取消", null);
+                builder.create().show();
+                break;
+            case 2:
                 File file = new File(DBHelper.DATABASE_NAME);
                 if (file.exists()) {
                     Intent intent = new Intent();
@@ -162,31 +211,31 @@ public class FavoriteActivity extends Activity {
                     Toast.makeText(getApplicationContext(), "数据库文件不存在", Toast.LENGTH_SHORT).show();
                 }
                 break;
-            case 2:
+            case 3:
                 DBHelper helper = new DBHelper(getApplicationContext());
                 Cursor cursor = helper.query("");
                 String s = "<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no\"/>\n<title>收藏夹</title>\n<style>\na { text-decoration: none; }\ntable { table-layout: fixed; width: 100%; border-collapse: collapse; }\nth, td { border: 1px solid black; padding: 5px; overflow: hidden; text-overflow: ellipsis; }\ntd:nth-child(3) { white-space: nowrap; }\n</style>\n</head>\n<body>\n<h2 align=center>收藏夹" + cursor.getCount() + "</h2>\n<table>\n<tr><th>标题</th><th>网址</th><th>分类</th></tr>\n";
                 if (cursor != null) {
                     while (cursor.moveToNext()) {
-                        String title = cursor.getString(cursor.getColumnIndex("title"));
+                        String title1 = cursor.getString(cursor.getColumnIndex("title"));
                         String website = cursor.getString(cursor.getColumnIndex("website"));
                         String category = cursor.getString(cursor.getColumnIndex("category"));
-                        s = s + "<tr><td>" + title + "</td><td><a href=\"" + website + "\" target=\"_blank\">" + website + "</a></td><td>" + category + "</td></tr>\n";
+                        s = s + "<tr><td>" + title1 + "</td><td><a href=\"" + website + "\" target=\"_blank\">" + website + "</a></td><td>" + category + "</td></tr>\n";
                     }
                 }
                 s += "</table>\n</body>\n</html>";
                 writeFile("webfav.htm", s);
                 break;
-            case 3:
+            case 4:
                 s = "";
                 helper = new DBHelper(getApplicationContext());
                 cursor = helper.query("");
                 if (cursor != null) {
                     while (cursor.moveToNext()) {
-                        String title = cursor.getString(cursor.getColumnIndex("title"));
+                        String title1 = cursor.getString(cursor.getColumnIndex("title"));
                         String website = cursor.getString(cursor.getColumnIndex("website"));
                         String category = cursor.getString(cursor.getColumnIndex("category"));
-                        s = s + title.replace(",", "，") + "," + website + "," + category + "\n";
+                        s = s + title1.replace(",", "，") + "," + website + "," + category + "\n";
                     }
                 }
                 writeFile("webfav.csv", s);
@@ -348,6 +397,7 @@ public class FavoriteActivity extends Activity {
     class RadioButtonOnClickListener implements View.OnClickListener {
         @Override
         public void onClick(View v) {
+            IMM.hideSoftInputFromWindow(editText.getWindowToken(), 0);
             RadioButton radioButton = (RadioButton) v;
             String s = radioButton.getText().toString();
             search(1, s);
@@ -392,6 +442,7 @@ public class FavoriteActivity extends Activity {
     }
 
     void genCategory() {
+        IMM.hideSoftInputFromWindow(editText.getWindowToken(), 0);
         radioGroup.removeAllViews();
         DBHelper helper = new DBHelper(this);
         Cursor cursor = helper.category("");
diff --git a/main/java/com/hty/browser/MainActivity.java b/main/java/com/hty/browser/MainActivity.java
index bfd3426..465ec7e 100644
--- a/main/java/com/hty/browser/MainActivity.java
+++ b/main/java/com/hty/browser/MainActivity.java
@@ -1042,7 +1042,7 @@ public class MainActivity extends Activity {
 
     void DialogBlockList(){
         final String[] datas = ReadFile("blockrules").split("\n");
-        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, datas);
+        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, datas);
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
         builder.setIcon(R.drawable.ic_launcher);
         builder.setTitle("屏蔽规则列表：");