Initial commit

99850947 · 汪林玲 · 99850947 · 99850947 · 99850947 · 99850947
Commit 99850947 authored Oct 08, 2021 by 汪林玲
16 changed files
--- a/.gitignore
+++ b/.gitignore
+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+build/
+ios/.generated/
+ios/Flutter/Generated.xcconfig
+ios/Runner/GeneratedPluginRegistrant.*
--- a/.metadata
+++ b/.metadata
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 16f7d4016ef4f2989fc15444f1635035d121af94
+  channel: master
+
+project_type: package
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
+## 2.0.1
+
+* Fix issue that list sync issue is not fixed #40
+
+## 2.0.0
+
+* Breaking change: add clipBehavior and restorationId
+* Merge flutter/issues/29264(SliverAppBar's flexibleSpace glitch on iOS when NestedScrollView's body is a ScrollView)
+
+## 1.0.1
+
+* Merge flutter/flutter#59187(Support floating the header slivers of a NestedScrollView)
+
+## 1.0.0
+
+* Merge code from 1.17.0
+* Fix analysis_options
+
+## 0.4.1
+
+* add demo to show how to change pinned header height dynamically.
+
+## 0.4.0
+
+* web support
+
+## 0.3.8
+
+* add NestedScrollViewState key to get currentInnerPosition/innerScrollPositions instead of ScrollController
+* due to we can't set ScrollController for list in NestedScrollView's body(it will breaking behaviours of InnerScrollController in NestedScrollView), provide demos('PullToRefresh','LoadMore' and 'ScrollToTop') to show how to do it without ScrollController
+
+## 0.3.6
+
+* fix api error base on Flutter SDK v1.7.8+hotfix.2
+
+## 0.3.5
+
+* New ExtendedNestedScrollView still has some issues in special layout, make it as obsolete for now till find a better solution
+
+## 0.3.3
+
+* fix issue that Caught error: type 'Future<void>' is not a subtype of type 'Future<Null>'
+ for old extended_nested_scroll_view
+
+## 0.2.9
+
+* fix issue 0.2.5 for old extended_nested_scroll_view
+
+## 0.2.7
+
+* fix issue for quick change page
+* handle unavailable page change(no actived nested positions in it)
+
+## 0.2.5
+
+* fix issue that ut postion is not overscroll actually,it get minimal value
+  and will scroll inner positions
+  igore  minimal value here(value like following data)
+  /// I/flutter (14963): 5.684341886080802e-14
+  /// I/flutter (14963): -5.684341886080802e-14
+  if (innerDelta != 0.0 && innerDelta.abs() > 0.0001) {
+  for (_NestedScrollPosition position in _activedInnerPositions) {
+        position.applyFullDragUpdate(innerDelta);
+     }
+   }
+
+## 0.2.0
+
+* update new extended_nested_scroll_view demo
+
+## 0.1.9
+
+* set keepOnlyOneInnerNestedScrollPositionActive default value: false
+
+## 0.1.8
+
+* update new ExtendedNestedScrollView readme
+
+## 0.1.7
+
+* add assert for keepOnlyOneInnerNestedScrollPositionActive
+    ///when ExtendedNestedScrollView body has TabBarView/PageView and children have
+    ///AutomaticKeepAliveClientMixin or PageStorageKey,
+    ///_innerController.nestedPositions will have more one,
+    ///when you scroll, it will scroll all of nestedPositions
+    ///set keepOnlyOneInnerNestedScrollPositionActive true to avoid it.
+    ///notice: only for Axis.horizontal TabBarView/PageView and
+    ///scrollDirection must be Axis.vertical.
+assert(!(widget.keepOnlyOneInnerNestedScrollPositionActive && widget.scrollDirection == Axis.horizontal));
+
+## 0.1.6
+
+* fix issue: Actived _NestedScrollPosition is not right for multiple
+
+## 0.1.5
+
+* add new ExtendedNestedScrollView to slove issue more smartly.
+
+## 0.1.4
+
+* Update readme.
+
+## 0.1.3
+
+* Update demo.
+
+## 0.1.2
+
+* Remove unused method.
+
+## 0.1.1
+
+* Update demo.
+
+## 0.1.0
+
+* Upgrade Some Commments.
+
+## 0.0.1
+
+* Initial Open Source release.
--- a/LICENSE
+++ b/LICENSE
+MIT License
+
+Copyright (c) 2018 zmtzawqlp
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
--- a/README-ZH.md
+++ b/README-ZH.md
+# extended_nested_scroll_view
+
+[![pub package](https://img.shields.io/pub/v/extended_nested_scroll_view.svg)](https://pub.dartlang.org/packages/extended_nested_scroll_view) [![GitHub stars](https://img.shields.io/github/stars/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/stargazers) [![GitHub forks](https://img.shields.io/github/forks/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/network)  [![GitHub license](https://img.shields.io/github/license/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/blob/master/LICENSE)  [![GitHub issues](https://img.shields.io/github/issues/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/issues) <a target="_blank" href="https://jq.qq.com/?_wv=1027&k=5bcc0gy"><img border="0" src="https://pub.idqqimg.com/wpa/images/group.png" alt="flutter-candies" title="flutter-candies"></a>
+
+文档语言: [English](README.md) | [中文简体](README-ZH.md)
+
+扩展NestedScrollView来修复了下面的问题
+
+1.[pinned的Header的问题](https://github.com/flutter/flutter/issues/22393)
+
+2.[body里面TabView列表滚动同步，互相影响的问题](https://github.com/flutter/flutter/issues/21868)
+
+3.下拉刷新不能工作
+
+4.在NestedScrollView的body中不通过设置ScrollController(设置了会跟内部Controller冲突)来完成下拉刷新，增量加载，滚动到顶部
+
+[掘金](https://juejin.im/post/5bea43ade51d45544844010a)
+
+[Web demo for ExtendedNestedScrollView](https://fluttercandies.github.io/extended_nested_scroll_view/)
+
+- [extended_nested_scroll_view](#extendednestedscrollview)
+- [Example for issue 1](#example-for-issue-1)
+- [Example for issue 2](#example-for-issue-2)
+  - [步骤1](#%e6%ad%a5%e9%aa%a41)
+  - [步骤2](#%e6%ad%a5%e9%aa%a42)
+- [Example for NestedScrollView pull to refresh](#example-for-nestedscrollview-pull-to-refresh)
+- [Do without ScrollController in NestedScrollView's body](#do-without-scrollcontroller-in-nestedscrollviews-body)
+# Example for issue 1
+
+ 在pinnedHeaderSliverHeightBuilder回调中设置全部pinned的header的高度，
+ demo里面高度为 状态栏高度+SliverAppbar的高度
+``` dart
+ var tabBarHeight = primaryTabBar.preferredSize.height;
+      var pinnedHeaderHeight =
+          //statusBar height
+          statusBarHeight +
+              //pinned SliverAppBar height in header
+              kToolbarHeight;
+
+ return NestedScrollView(
+        pinnedHeaderSliverHeightBuilder: () {
+          return pinnedHeaderHeight;
+        },
+       
+```
+# Example for issue 2
+
+## 步骤1
+
+TabbarView里面的列表，使用NestedScrollViewInnerScrollPositionKeyWidget包住，并且设置唯一key，
+这个key跟列表是第几个tab有关系。
+``` dart
+ return extended.NestedScrollViewInnerScrollPositionKeyWidget(
+        widget.tabKey,
+        ListView.builder(
+            itemBuilder: (c, i) {
+              return Container(
+                alignment: Alignment.center,
+                height: 60.0,
+                child: Text(widget.tabKey.toString() + ": List$i"),
+              );
+            },
+            itemCount: 100)
+        );
+```
+## 步骤2
+
+innerScrollPositionKeyBuilder回调中给出当前tab的key. 这个key应该跟第一步中相同
+``` dart
+ extended.NestedScrollView(
+        innerScrollPositionKeyBuilder: () {
+          var index = "Tab";
+          if (primaryTC.index == 0) {
+            index +=
+                (primaryTC.index.toString() + secondaryTC.index.toString());
+          } else {
+            index += primaryTC.index.toString();
+          }
+          return Key(index);
+        },
+```
+# Example for NestedScrollView pull to refresh
+
+NestedScrollViewRefreshIndicator is as the same as Flutter RefreshIndicator.
+``` dart
+ NestedScrollViewRefreshIndicator(
+       onRefresh: onRefresh,
+       child: extended.NestedScrollView(
+         headerSliverBuilder: (c, f) {
+           return _buildSliverHeader(primaryTabBar);
+         },
+```
+
+[建议使用这个来做NestedScrollView的整体下拉刷新](https://github.com/fluttercandies/loading_more_list/blob/master/example/lib/demo/nested_scroll_view_demo.dart)
+
+Please see the example app of this for a full example.
+
+# Do without ScrollController in NestedScrollView's body
+
+因为无法给NestedScrollView的body中的列表设置ScrollController(这样会破坏NestedScrollView内部的InnerScrollController的行为)，所以我这里给大家提供了Demos来展示怎么不通过ScrollController来完成
+
+* [下拉刷新](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/pull_to_refresh.dart),
+  
+* [增量加载](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/load_more.dart) 
+  
+* [滚动到顶部](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/scroll_to_top.dart) 
+
+* [动态改变PinnedHeaderHeight](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/dynamic_pinned_header_height.dart) 
+
+# ☕️Buy me a coffee
+
+![img](http://zmtzawqlp.gitee.io/my_images/images/qrcode.png)
--- a/README.md
+++ b/README.md
+# extended_nested_scroll_view
+
+[![pub package](https://img.shields.io/pub/v/extended_nested_scroll_view.svg)](https://pub.dartlang.org/packages/extended_nested_scroll_view) [![GitHub stars](https://img.shields.io/github/stars/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/stargazers) [![GitHub forks](https://img.shields.io/github/forks/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/network)  [![GitHub license](https://img.shields.io/github/license/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/blob/master/LICENSE)  [![GitHub issues](https://img.shields.io/github/issues/fluttercandies/extended_nested_scroll_view)](https://github.com/fluttercandies/extended_nested_scroll_view/issues) <a target="_blank" href="https://jq.qq.com/?_wv=1027&k=5bcc0gy"><img border="0" src="https://pub.idqqimg.com/wpa/images/group.png" alt="flutter-candies" title="flutter-candies"></a>
+
+Language: [English](README.md) | [中文简体](README-ZH.md)
+
+NestedScrollView: extended nested scroll view to fix following issues.
+
+1.[pinned sliver header issue](https://github.com/flutter/flutter/issues/22393)
+
+2.[inner scrollables in tabview sync issue](https://github.com/flutter/flutter/issues/21868)
+
+3.pull to refresh is not work.
+
+4.do without ScrollController in NestedScrollView's body
+
+[Web demo for ExtendedNestedScrollView](https://fluttercandies.github.io/extended_nested_scroll_view/)
+
+- [extended_nested_scroll_view](#extended_nested_scroll_view)
+- [Example for issue 1](#example-for-issue-1)
+- [Example for issue 2](#example-for-issue-2)
+  - [Step1](#step1)
+  - [Step2](#step2)
+- [Example for NestedScrollView pull to refresh](#example-for-nestedscrollview-pull-to-refresh)
+- [Do without ScrollController in NestedScrollView's body](#do-without-scrollcontroller-in-nestedscrollviews-body)
+# Example for issue 1
+
+give total height of pinned sliver headers in pinnedHeaderSliverHeightBuilder callback
+``` dart
+ var tabBarHeight = primaryTabBar.preferredSize.height;
+      var pinnedHeaderHeight =
+          //statusBar height
+          statusBarHeight +
+              //pinned SliverAppBar height in header
+              kToolbarHeight;
+
+ return NestedScrollView(
+        pinnedHeaderSliverHeightBuilder: () {
+          return pinnedHeaderHeight;
+        },
+       
+```
+# Example for issue 2
+
+## Step1
+
+Put your list which in tabview into NestedScrollViewInnerScrollPositionKeyWidget,and get unique a key
+``` dart
+ return extended.NestedScrollViewInnerScrollPositionKeyWidget(
+        widget.tabKey,
+        ListView.builder(
+            itemBuilder: (c, i) {
+              return Container(
+                alignment: Alignment.center,
+                height: 60.0,
+                child: Text(widget.tabKey.toString() + ": List$i"),
+              );
+            },
+            itemCount: 100)
+        );
+```
+## Step2
+
+get current tab key in innerScrollPositionKeyBuilder callback. this key should as same as in step 1 given.
+``` dart
+ extended.NestedScrollView(
+        innerScrollPositionKeyBuilder: () {
+          var index = "Tab";
+          if (primaryTC.index == 0) {
+            index +=
+                (primaryTC.index.toString() + secondaryTC.index.toString());
+          } else {
+            index += primaryTC.index.toString();
+          }
+          return Key(index);
+        },
+```
+# Example for NestedScrollView pull to refresh
+
+NestedScrollViewRefreshIndicator is as the same as Flutter RefreshIndicator.
+``` dart
+ NestedScrollViewRefreshIndicator(
+       onRefresh: onRefresh,
+       child: extended.NestedScrollView(
+         headerSliverBuilder: (c, f) {
+           return _buildSliverHeader(primaryTabBar);
+         },
+```
+
+[Better one to pull to refresh](https://github.com/fluttercandies/loading_more_list/blob/master/example/lib/demo/nested_scroll_view_demo.dart)
+
+Please see the example app of this for a full example.
+
+# Do without ScrollController in NestedScrollView's body
+
+* due to we can't set ScrollController for list in NestedScrollView's body(it will breaking behaviours of InnerScrollController in NestedScrollView),provide Demos
+  
+* [pull to refresh](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/pull_to_refresh.dart),
+  
+* [load more](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/load_more.dart) 
+  
+* [scroll to top](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/scroll_to_top.dart) 
+  
+  to show how to do it without ScrollController
+
+
+* [pinned header height](https://github.com/fluttercandies/extended_nested_scroll_view/tree/master/example/lib/pages/dynamic_pinned_header_height.dart) 
+
+  to show how to change pinned header height dynamically.
+
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
+# Specify analysis options.
+#
+# Until there are meta linter rules, each desired lint must be explicitly enabled.
+# See: https://github.com/dart-lang/linter/issues/288
+#
+# For a list of lints, see: http://dart-lang.github.io/linter/lints/
+# See the configuration guide for more
+# https://github.com/dart-lang/sdk/tree/master/pkg/analyzer#configuring-the-analyzer
+#
+# There are other similar analysis options files in the flutter repos,
+# which should be kept in sync with this file:
+#
+#   - analysis_options.yaml (this file)
+#   - packages/flutter/lib/analysis_options_user.yaml
+#   - https://github.com/flutter/plugins/blob/master/analysis_options.yaml
+#   - https://github.com/flutter/engine/blob/master/analysis_options.yaml
+#
+# This file contains the analysis options used by Flutter tools, such as IntelliJ,
+# Android Studio, and the `flutter analyze` command.
+
+analyzer:
+  strong-mode:
+    implicit-casts: false
+    implicit-dynamic: false
+  errors:
+    # treat missing required parameters as a warning (not a hint)
+    missing_required_param: warning
+    # treat missing returns as a warning (not a hint)
+    missing_return: warning
+    # allow having TODOs in the code
+    todo: ignore
+    # Ignore analyzer hints for updating pubspecs when using Future or
+    # Stream and not importing dart:async
+    # Please see https://github.com/flutter/flutter/pull/24528 for details.
+    sdk_version_async_exported_from_core: ignore
+  # exclude:
+  #   - "bin/cache/**"
+  #   # the following two are relative to the stocks example and the flutter package respectively
+  #   # see https://github.com/dart-lang/sdk/issues/28463
+  #   - "lib/i18n/messages_*.dart"
+  #   - "lib/src/http/**"
+
+linter:
+  rules:
+    # these rules are documented on and in the same order as
+    # the Dart Lint rules page to make maintenance easier
+    # https://github.com/dart-lang/linter/blob/master/example/all.yaml
+    - always_declare_return_types
+    - always_put_control_body_on_new_line
+    # - always_put_required_named_parameters_first # we prefer having parameters in the same order as fields https://github.com/flutter/flutter/issues/10219
+    - always_require_non_null_named_parameters
+    - always_specify_types
+    - annotate_overrides
+    # - avoid_annotating_with_dynamic # conflicts with always_specify_types
+    # - avoid_as # required for implicit-casts: true
+    - avoid_bool_literals_in_conditional_expressions
+    # - avoid_catches_without_on_clauses # we do this commonly
+    # - avoid_catching_errors # we do this commonly
+    - avoid_classes_with_only_static_members
+    # - avoid_double_and_int_checks # only useful when targeting JS runtime
+    - avoid_empty_else
+    # - avoid_equals_and_hash_code_on_mutable_classes # not yet tested
+    - avoid_field_initializers_in_const_classes
+    - avoid_function_literals_in_foreach_calls
+    # - avoid_implementing_value_types # not yet tested
+    - avoid_init_to_null
+    # - avoid_js_rounded_ints # only useful when targeting JS runtime
+    - avoid_null_checks_in_equality_operators
+    # - avoid_positional_boolean_parameters # not yet tested
+    # - avoid_print # not yet tested
+    # - avoid_private_typedef_functions # we prefer having typedef (discussion in https://github.com/flutter/flutter/pull/16356)
+    # - avoid_redundant_argument_values # not yet tested
+    - avoid_relative_lib_imports
+    - avoid_renaming_method_parameters
+    - avoid_return_types_on_setters
+    # - avoid_returning_null # there are plenty of valid reasons to return null
+    # - avoid_returning_null_for_future # not yet tested
+    - avoid_returning_null_for_void
+    # - avoid_returning_this # there are plenty of valid reasons to return this
+    # - avoid_setters_without_getters # not yet tested
+    # - avoid_shadowing_type_parameters # not yet tested
+    - avoid_single_cascade_in_expression_statements
+    - avoid_slow_async_io
+    - avoid_types_as_parameter_names
+    # - avoid_types_on_closure_parameters # conflicts with always_specify_types
+    # - avoid_unnecessary_containers # not yet tested
+    - avoid_unused_constructor_parameters
+    - avoid_void_async
+    # - avoid_web_libraries_in_flutter # not yet tested
+    - await_only_futures
+    - camel_case_extensions
+    - camel_case_types
+    - cancel_subscriptions
+    # - cascade_invocations # not yet tested
+    # - close_sinks # not reliable enough
+    # - comment_references # blocked on https://github.com/flutter/flutter/issues/20765
+    # - constant_identifier_names # needs an opt-out https://github.com/dart-lang/linter/issues/204
+    - control_flow_in_finally
+    # - curly_braces_in_flow_control_structures # not yet tested
+    # - diagnostic_describe_all_properties # not yet tested
+    - directives_ordering
+    - empty_catches
+    - empty_constructor_bodies
+    - empty_statements
+    # - file_names # not yet tested
+    - flutter_style_todos
+    - hash_and_equals
+    - implementation_imports
+    # - invariant_booleans # too many false positives: https://github.com/dart-lang/linter/issues/811
+    - iterable_contains_unrelated_type
+    # - join_return_with_assignment # not yet tested
+    - library_names
+    - library_prefixes
+    # - lines_longer_than_80_chars # not yet tested
+    - list_remove_unrelated_type
+    # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
+    # - missing_whitespace_between_adjacent_strings # not yet tested
+    - no_adjacent_strings_in_list
+    - no_duplicate_case_values
+    # - no_logic_in_create_state # not yet tested
+    # - no_runtimeType_toString # not yet tested
+    - non_constant_identifier_names
+    # - null_closures  # not yet tested
+    # - omit_local_variable_types # opposite of always_specify_types
+    # - one_member_abstracts # too many false positives
+    # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
+    - overridden_fields
+    - package_api_docs
+    - package_names
+    - package_prefixed_library_names
+    # - parameter_assignments # we do this commonly
+    - prefer_adjacent_string_concatenation
+    - prefer_asserts_in_initializer_lists
+    # - prefer_asserts_with_message # not yet tested
+    - prefer_collection_literals
+    - prefer_conditional_assignment
+    - prefer_const_constructors
+    - prefer_const_constructors_in_immutables
+    - prefer_const_declarations
+    - prefer_const_literals_to_create_immutables
+    # - prefer_constructors_over_static_methods # not yet tested
+    - prefer_contains
+    # - prefer_double_quotes # opposite of prefer_single_quotes
+    - prefer_equal_for_default_values
+    # - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
+    - prefer_final_fields
+    - prefer_final_in_for_each
+    - prefer_final_locals
+    - prefer_for_elements_to_map_fromIterable
+    - prefer_foreach
+    # - prefer_function_declarations_over_variables # not yet tested
+    - prefer_generic_function_type_aliases
+    - prefer_if_elements_to_conditional_expressions
+    - prefer_if_null_operators
+    - prefer_initializing_formals
+    - prefer_inlined_adds
+    # - prefer_int_literals # not yet tested
+    # - prefer_interpolation_to_compose_strings # not yet tested
+    - prefer_is_empty
+    - prefer_is_not_empty
+    - prefer_is_not_operator
+    - prefer_iterable_whereType
+    # - prefer_mixin # https://github.com/dart-lang/language/issues/32
+    # - prefer_null_aware_operators # disable until NNBD, see https://github.com/flutter/flutter/pull/32711#issuecomment-492930932
+    # - prefer_relative_imports # not yet tested
+    - prefer_single_quotes
+    - prefer_spread_collections
+    - prefer_typing_uninitialized_variables
+    - prefer_void_to_null
+    # - provide_deprecation_message # not yet tested
+    # - public_member_api_docs # enabled on a case-by-case basis; see e.g. packages/analysis_options.yaml
+    - recursive_getters
+    - slash_for_doc_comments
+    # - sort_child_properties_last # not yet tested
+    - sort_constructors_first
+    - sort_pub_dependencies
+    - sort_unnamed_constructors_first
+    - test_types_in_equals
+    - throw_in_finally
+    # - type_annotate_public_apis # subset of always_specify_types
+    - type_init_formals
+    # - unawaited_futures # too many false positives
+    # - unnecessary_await_in_return # not yet tested
+    - unnecessary_brace_in_string_interps
+    - unnecessary_const
+    # - unnecessary_final # conflicts with prefer_final_locals
+    - unnecessary_getters_setters
+    # - unnecessary_lambdas # has false positives: https://github.com/dart-lang/linter/issues/498
+    - unnecessary_new
+    - unnecessary_null_aware_assignments
+    - unnecessary_null_in_if_null_operators
+    - unnecessary_overrides
+    - unnecessary_parenthesis
+    - unnecessary_statements
+    - unnecessary_string_interpolations
+    - unnecessary_this
+    - unrelated_type_equality_checks
+    # - unsafe_html # not yet tested
+    - use_full_hex_values_for_flutter_colors
+    # - use_function_type_syntax_for_parameters # not yet tested
+    # - use_key_in_widget_constructors # not yet tested
+    - use_rethrow_when_possible
+    # - use_setters_to_change_properties # not yet tested
+    # - use_string_buffers # has false positives: https://github.com/dart-lang/sdk/issues/34182
+    # - use_to_and_as_if_applicable # has false positives, so we prefer to catch this by code-review
+    - valid_regexps
+    - void_checks
--- a/extended_nested_scroll_view.iml
+++ b/extended_nested_scroll_view.iml
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/.idea" />
+      <excludeFolder url="file://$MODULE_DIR$/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/example/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/example/example/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/example/example/build" />
+    </content>
+    <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Flutter Plugins" level="project" />
+  </component>
+</module>
\ No newline at end of file
--- a/lib/extended_nested_scroll_view.dart
+++ b/lib/extended_nested_scroll_view.dart
+library extended_nested_scroll_view;
+
+//export 'src/extended_nested_scroll_view.dart';
+export 'src/nested_scroll_view_inner_scroll_position_key_widget.dart';
+export 'src/nested_scroll_view_refresh_indicator.dart';
+export 'src/old_extended_nested_scroll_view.dart';
+export 'src/util.dart';
--- a/lib/src/extended_nested_scroll_view.dart
+++ b/lib/src/extended_nested_scroll_view.dart
--- a/lib/src/nested_scroll_view_inner_scroll_position_key_widget.dart
+++ b/lib/src/nested_scroll_view_inner_scroll_position_key_widget.dart
+//pack your inner scrollables which are in  NestedScrollView body
+//so that it can find the active scrollable
+//compare with NestedScrollViewInnerScrollPositionKeyBuilder
+import 'package:flutter/material.dart';
+
+class NestedScrollViewInnerScrollPositionKeyWidget extends StatefulWidget {
+  const NestedScrollViewInnerScrollPositionKeyWidget(
+      this.scrollPositionKey, this.child);
+  final Key scrollPositionKey;
+  final Widget child;
+  static State of(BuildContext context) {
+    return context.findAncestorStateOfType<
+        _NestedScrollViewInnerScrollPositionKeyWidgetState>();
+  }
+
+  @override
+  _NestedScrollViewInnerScrollPositionKeyWidgetState createState() =>
+      _NestedScrollViewInnerScrollPositionKeyWidgetState();
+}
+
+class _NestedScrollViewInnerScrollPositionKeyWidgetState
+    extends State<NestedScrollViewInnerScrollPositionKeyWidget> {
+  @override
+  Widget build(BuildContext context) {
+    return widget.child;
+  }
+}
--- a/lib/src/nested_scroll_view_refresh_indicator.dart
+++ b/lib/src/nested_scroll_view_refresh_indicator.dart
--- a/lib/src/old_extended_nested_scroll_view.dart
+++ b/lib/src/old_extended_nested_scroll_view.dart
--- a/lib/src/util.dart
+++ b/lib/src/util.dart
+///get type from T
+Type typeOf<T>() => T;
--- a/pubspec.lock
+++ b/pubspec.lock
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.8.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.15.0"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.0"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.12.10"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.7.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.8.0"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.8.1"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.4.2"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.0"
+sdks:
+  dart: ">=2.12.0 <3.0.0"
+  flutter: ">=1.22.4"
--- a/pubspec.yaml
+++ b/pubspec.yaml
+name: extended_nested_scroll_view
+description: extended nested scroll view to fix pinned header and inner scrollables sync issues.
+version: 2.5.0
+homepage: https://github.com/fluttercandies/extended_nested_scroll_view
+
+environment:
+  sdk: ">=2.6.0 <3.0.0"
+  flutter: ">=1.22.4"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+flutter:
\ No newline at end of file