Upgrade flutter, library versions, and include minCacheExtent property

example/lib/common/models.dart

@@ -88,6 +88,7 @@ class Languages extends GithubLanguage with ISuspensionBean {
   @override
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> map = super.toJson();
+    // ignore: unused_element
     void addIfNonNull(String fieldName, dynamic value) {
       if (value != null) {
         map[fieldName] = value;

example/lib/main.dart

@@ -20,6 +20,7 @@ class MyApp extends StatelessWidget {
       title: 'AzListView Demo',
       theme: ThemeData(
         primaryColor: Colors.white,
+        // ignore: deprecated_member_use
         accentColor: Colors.grey,
         //primarySwatch: Colors.white,
         visualDensity: VisualDensity.adaptivePlatformDensity,

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';

example/lib/ui/citylist_page.dart

@@ -118,10 +118,11 @@ class _CityListPageState extends State<CityListPage> {
               child: Card(
                 clipBehavior: Clip.hardEdge,
                 margin: const EdgeInsets.only(left: 8, top: 8, right: 8),
-                shape: const RoundedRectangleBorder(
+                shape: RoundedRectangleBorder(
                   borderRadius: const BorderRadius.only(
-                      topLeft: Radius.circular(4.0),
-                      topRight: Radius.circular(4.0)),
+                    topLeft: Radius.circular(4.0),
+                    topRight: Radius.circular(4.0),
+                  ),
                 ),
                 child: Column(
                   children: [

example/pubspec.lock

@@ -5,9 +5,9 @@ packages:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   azlistview:
     dependency: "direct main"
     description:
@@ -19,79 +19,72 @@ packages:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.3.1"
+    version: "1.2.1"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   common_utils:
     dependency: "direct main"
     description:
       name: common_utils
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.1.0"
   convert:
     dependency: transitive
     description:
       name: convert
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.2"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.2"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.5"
   decimal:
     dependency: transitive
     description:
       name: decimal
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "2.2.0"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -108,58 +101,58 @@ packages:
       path: "."
       ref: HEAD
       resolved-ref: b4f88207ebc0c5dcc8baa1676a0fd7796974173a
-      url: "git://github.com/Sky24n/github_language_colors.git"
+      url: "https://github.com/Sky24n/github_language_colors.git"
     source: git
     version: "2.0.0"
   lpinyin:
     dependency: "direct main"
     description:
       name: lpinyin
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.3"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "0.12.11"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.2"
   rational:
     dependency: transitive
     description:
       name: rational
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "2.2.0"
   scrollable_positioned_list:
     dependency: transitive
     description:
       name: scrollable_positioned_list
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.3"
+    version: "0.3.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -169,58 +162,58 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.8"
+    version: "0.4.9"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.1"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.17.0"
+  dart: ">=2.17.0-0 <3.0.0"
+  flutter: ">=2.12.0"

example/pubspec.yaml

@@ -28,10 +28,10 @@ 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
-  common_utils: ^2.0.0
+  cupertino_icons: ^1.0.5
+  common_utils: ^2.1.0
   # 汉字转拼音
-  lpinyin: ^2.0.0
+  lpinyin: ^2.0.3
   azlistview:
     path: ../
 
@@ -41,7 +41,7 @@ dependencies:
   # url: git://github.com/Sky24n/github_language_colors.git
   github_language_colors:
     git:
-      url: git://github.com/Sky24n/github_language_colors.git
+      url: https://github.com/Sky24n/github_language_colors.git
 
 dev_dependencies:
   flutter_test:

lib/src/az_listview.dart

@@ -28,6 +28,7 @@ class AzListView extends StatefulWidget {
     this.indexBarAlignment = Alignment.centerRight,
     this.indexBarMargin,
     this.indexBarOptions = const IndexBarOptions(),
+    this.minCacheExtent,
   }) : super(key: key);
 
   /// with  ISuspensionBean Data
@@ -93,6 +94,10 @@ class AzListView extends StatefulWidget {
   /// IndexBar options.
   final IndexBarOptions indexBarOptions;
 
+  /// The minimum cache extent used by the underlying scroll lists.
+  /// See [ScrollView.cacheExtent].
+  final double? minCacheExtent;
+
   @override
   _AzListViewState createState() => _AzListViewState();
 }
@@ -193,6 +198,7 @@ class _AzListViewState extends State<AzListView> {
           susPosition: widget.susPosition,
           padding: widget.padding,
           physics: widget.physics,
+          minCacheExtent: widget.minCacheExtent,
         ),
         Align(
           alignment: widget.indexBarAlignment,

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();
   }
 
@@ -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],