diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index 7cc793e..a4e220c 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -25,7 +25,7 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 31   
 
     lintOptions {
         disable 'InvalidPackage'
@@ -35,7 +35,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "club.flutterchina.azlistview_example"
         minSdkVersion 16
-        targetSdkVersion 28
+        targetSdkVersion 33
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
diff --git a/example/android/app/src/main/AndroidManifest.xml b/example/android/app/src/main/AndroidManifest.xml
index 66dc9fe..ad4de46 100644
--- a/example/android/app/src/main/AndroidManifest.xml
+++ b/example/android/app/src/main/AndroidManifest.xml
@@ -15,7 +15,8 @@
             android:hardwareAccelerated="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:exported="true">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
diff --git a/example/android/build.gradle b/example/android/build.gradle
index e0d7ae2..9881192 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:7.4.2'
     }
 }
 
@@ -24,6 +24,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }
diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties
index 296b146..cfe88f6 100644
--- a/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-all.zip
diff --git a/example/lib/common/models.dart b/example/lib/common/models.dart
index 59c3e16..6399162 100644
--- a/example/lib/common/models.dart
+++ b/example/lib/common/models.dart
@@ -88,11 +88,11 @@ class Languages extends GithubLanguage with ISuspensionBean {
   @override
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> map = super.toJson();
-    void addIfNonNull(String fieldName, dynamic value) {
-      if (value != null) {
-        map[fieldName] = value;
-      }
-    }
+    // void addIfNonNull(String fieldName, dynamic value) {
+    //   if (value != null) {
+    //     map[fieldName] = value;
+    //   }
+    // }
 
 //    addIfNonNull('tagIndex', tagIndex);
     return map;
diff --git a/example/lib/common/utils.dart b/example/lib/common/utils.dart
index 6fccc35..491482c 100644
--- a/example/lib/common/utils.dart
+++ b/example/lib/common/utils.dart
@@ -1,8 +1,9 @@
 import 'package:azlistview_example/common/index.dart';
+
 import 'package:flutter/material.dart';
 
 class Utils {
-  static String getImgPath(String name, {String format: 'png'}) {
+  static String getImgPath(String name, {String format = 'png'}) {
     return 'assets/images/$name.$format';
   }
 
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 9b6df88..5453db2 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -20,7 +20,7 @@ class MyApp extends StatelessWidget {
       title: 'AzListView Demo',
       theme: ThemeData(
         primaryColor: Colors.white,
-        accentColor: Colors.grey,
+        hintColor: Colors.grey,
         //primarySwatch: Colors.white,
         visualDensity: VisualDensity.adaptivePlatformDensity,
       ),
diff --git a/example/lib/ui/car_models_page.dart b/example/lib/ui/car_models_page.dart
index 2f902b2..d3b27bd 100644
--- a/example/lib/ui/car_models_page.dart
+++ b/example/lib/ui/car_models_page.dart
@@ -1,5 +1,3 @@
-import 'dart:developer';
-
 import 'package:azlistview/azlistview.dart';
 import 'package:azlistview_example/common/index.dart';
 import 'package:flutter/material.dart';
diff --git a/example/pubspec.lock b/example/pubspec.lock
index e45ad9a..94b42eb 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -5,9 +5,10 @@ packages:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.flutter-io.cn"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.8.2"
+    version: "2.11.0"
   azlistview:
     dependency: "direct main"
     description:
@@ -19,79 +20,82 @@ packages:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.flutter-io.cn"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.flutter-io.cn"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.flutter-io.cn"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.flutter-io.cn"
+      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.15.0"
+    version: "1.17.1"
   common_utils:
     dependency: "direct main"
     description:
       name: common_utils
-      url: "https://pub.flutter-io.cn"
+      sha256: c26884339b13ff99b0739e56f4b02090c84054ed9dd3a045435cd24e7b99c2c1
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "2.1.0"
   convert:
     dependency: transitive
     description:
       name: convert
-      url: "https://pub.flutter-io.cn"
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
     source: hosted
-    version: "3.0.0"
+    version: "3.1.1"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      url: "https://pub.flutter-io.cn"
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.3"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      url: "https://pub.flutter-io.cn"
+      sha256: e35129dc44c9118cee2a5603506d823bab99c68393879edb440e0090d07586be
+      url: "https://pub.dev"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.5"
   decimal:
     dependency: transitive
     description:
       name: decimal
-      url: "https://pub.flutter-io.cn"
+      sha256: eece91944f523657c75a3a008a90ec7f7eb3986191153a78570c7d0ac8ef3d01
+      url: "https://pub.dev"
     source: hosted
-    version: "1.0.0"
+    version: "2.3.2"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.flutter-io.cn"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -111,55 +115,70 @@ packages:
       url: "git://github.com/Sky24n/github_language_colors.git"
     source: git
     version: "2.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
   lpinyin:
     dependency: "direct main"
     description:
       name: lpinyin
-      url: "https://pub.flutter-io.cn"
+      sha256: "0bb843363f1f65170efd09fbdfc760c7ec34fc6354f9fcb2f89e74866a0d814a"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.3"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.flutter-io.cn"
+      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.15"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      url: "https://pub.flutter-io.cn"
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      url: "https://pub.dev"
     source: hosted
-    version: "0.1.3"
+    version: "0.2.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.flutter-io.cn"
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.7.0"
+    version: "1.9.1"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.flutter-io.cn"
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.3"
   rational:
     dependency: transitive
     description:
       name: rational
-      url: "https://pub.flutter-io.cn"
+      sha256: ba58e9e18df9abde280e8b10051e4bce85091e41e8e7e411b6cde2e738d357cf
+      url: "https://pub.dev"
     source: hosted
-    version: "1.0.0"
+    version: "2.2.2"
   scrollable_positioned_list:
     dependency: transitive
     description:
       name: scrollable_positioned_list
-      url: "https://pub.flutter-io.cn"
+      sha256: "1b54d5f1329a1e263269abc9e2543d90806131aa14fe7c6062a8054d57249287"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.2.3"
+    version: "0.3.8"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -169,58 +188,66 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.flutter-io.cn"
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.flutter-io.cn"
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.dev"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.flutter-io.cn"
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.flutter-io.cn"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.flutter-io.cn"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.flutter-io.cn"
+      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      url: "https://pub.dev"
     source: hosted
-    version: "0.4.8"
+    version: "0.5.1"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      url: "https://pub.flutter-io.cn"
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.2"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.flutter-io.cn"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.4"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.17.0"
+  dart: ">=3.0.0-0 <4.0.0"
+  flutter: ">=2.12.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 37aa579..3164025 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -28,7 +28,7 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.3
+  cupertino_icons: ^1.0.5
   common_utils: ^2.0.0
   # 汉字转拼音
   lpinyin: ^2.0.0
diff --git a/lib/src/index_bar.dart b/lib/src/index_bar.dart
index f93251e..2c76203 100644
--- a/lib/src/index_bar.dart
+++ b/lib/src/index_bar.dart
@@ -1,5 +1,3 @@
-import 'dart:ui';
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'dart:math' as math;
@@ -280,7 +278,7 @@ class _IndexBarState extends State<IndexBar> {
   @override
   void initState() {
     super.initState();
-    widget.indexBarDragNotifier?.dragDetails?.addListener(_valueChanged);
+    widget.indexBarDragNotifier?.dragDetails.addListener(_valueChanged);
     widget.controller?._attach(this);
   }
 
@@ -319,7 +317,7 @@ class _IndexBarState extends State<IndexBar> {
   void dispose() {
     widget.controller?._detach();
     _removeOverlay();
-    widget.indexBarDragNotifier?.dragDetails?.removeListener(_valueChanged);
+    widget.indexBarDragNotifier?.dragDetails.removeListener(_valueChanged);
     super.dispose();
   }
 
@@ -351,8 +349,8 @@ class _IndexBarState extends State<IndexBar> {
 
   /// add overlay.
   void _addOverlay(BuildContext context) {
-    OverlayState? overlayState = Overlay.of(context);
-    if (overlayState == null) return;
+    OverlayState overlayState = Overlay.of(context);
+
     if (overlayEntry == null) {
       overlayEntry = OverlayEntry(builder: (BuildContext ctx) {
         double left;
@@ -527,7 +525,7 @@ class _BaseIndexBarState extends State<BaseIndexBar> {
             action == IndexBarDragDetails.actionUpdate)) {
       HapticFeedback.vibrate();
     }
-    widget.indexBarDragNotifier?.dragDetails?.value = IndexBarDragDetails(
+    widget.indexBarDragNotifier?.dragDetails.value = IndexBarDragDetails(
       action: action,
       index: lastIndex,
       tag: widget.data[lastIndex],
diff --git a/lib/src/suspension_view.dart b/lib/src/suspension_view.dart
index b1d0515..b7b5708 100644
--- a/lib/src/suspension_view.dart
+++ b/lib/src/suspension_view.dart
@@ -112,7 +112,7 @@ class _SuspensionViewState extends State<SuspensionView> {
             ISuspensionBean bean = widget.data[next];
             if (bean.isShowSuspension) {
               double height =
-                  context.findRenderObject()?.paintBounds?.height ?? 0;
+                  context.findRenderObject()?.paintBounds.height ?? 0;
               double topTemp = itemPosition.itemTrailingEdge * height;
               top = math.min(widget.susItemHeight, topTemp) -
                   widget.susItemHeight;
diff --git a/pubspec.lock b/pubspec.lock
index 1cb79b0..296a199 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,51 +5,82 @@ packages:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.flutter-io.cn"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.8.2"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.flutter-io.cn"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.flutter-io.cn"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.flutter-io.cn"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.flutter-io.cn"
+      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.17.1"
+  common_utils:
+    dependency: "direct main"
+    description:
+      name: common_utils
+      sha256: c26884339b13ff99b0739e56f4b02090c84054ed9dd3a045435cd24e7b99c2c1
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  decimal:
+    dependency: transitive
+    description:
+      name: decimal
+      sha256: eece91944f523657c75a3a008a90ec7f7eb3986191153a78570c7d0ac8ef3d01
+      url: "https://pub.dev"
     source: hosted
-    version: "1.15.0"
+    version: "2.3.2"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.flutter-io.cn"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -60,41 +91,70 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
+  lpinyin:
+    dependency: "direct main"
+    description:
+      name: lpinyin
+      sha256: "0bb843363f1f65170efd09fbdfc760c7ec34fc6354f9fcb2f89e74866a0d814a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.3"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.flutter-io.cn"
+      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.15"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      url: "https://pub.flutter-io.cn"
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      url: "https://pub.dev"
     source: hosted
-    version: "0.1.3"
+    version: "0.2.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.flutter-io.cn"
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.7.0"
+    version: "1.9.1"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.flutter-io.cn"
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.3"
+  rational:
+    dependency: transitive
+    description:
+      name: rational
+      sha256: ba58e9e18df9abde280e8b10051e4bce85091e41e8e7e411b6cde2e738d357cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
   scrollable_positioned_list:
     dependency: "direct main"
     description:
       name: scrollable_positioned_list
-      url: "https://pub.flutter-io.cn"
+      sha256: "1b54d5f1329a1e263269abc9e2543d90806131aa14fe7c6062a8054d57249287"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.2.3"
+    version: "0.3.8"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -104,58 +164,66 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.flutter-io.cn"
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.flutter-io.cn"
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.dev"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.flutter-io.cn"
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.flutter-io.cn"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.flutter-io.cn"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.flutter-io.cn"
+      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      url: "https://pub.dev"
     source: hosted
-    version: "0.4.8"
+    version: "0.5.1"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      url: "https://pub.flutter-io.cn"
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.2"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.flutter-io.cn"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.4"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.13.8"
+  dart: ">=3.0.0-0 <4.0.0"
+  flutter: ">=2.12.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index d725b1b..f3116c4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -7,10 +7,12 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
+  common_utils: ^2.1.0
   flutter:
     sdk: flutter
   # https://pub.flutter-io.cn/packages/scrollable_positioned_list
-  scrollable_positioned_list: ^0.2.3
+  lpinyin: ^2.0.3
+  scrollable_positioned_list: ^0.3.8
 
 dev_dependencies:
   flutter_test: