extended_nested_scroll_view 0.3.6

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extended_nested_scroll_view #

pub package

NestedScrollView: extended nested scroll view to fix following issues.

1.pinned sliver header issue

2.inner scrollables in tabview sync issue

3.pull to refresh is not work.

Chinese blog

Example for issue 1 #

give total height of pinned sliver headers in pinnedHeaderSliverHeightBuilder callback

 var tabBarHeight = primaryTabBar.preferredSize.height;
      var pinnedHeaderHeight =
          //statusBar height
          statusBarHeight +
              //pinned SliverAppBar height in header

 return NestedScrollView(
        pinnedHeaderSliverHeightBuilder: () {
          return pinnedHeaderHeight;

Example for issue 2 #

Step1 #

Put your list which in tabview into NestedScrollViewInnerScrollPositionKeyWidget,and get unique a key

 return extended.NestedScrollViewInnerScrollPositionKeyWidget(
        // myRefresh.RefreshIndicator(
        // child:
            itemBuilder: (c, i) {
              return Container(
                //decoration: BoxDecoration(border: Border.all(color: Colors.orange,width: 1.0)),
                alignment: Alignment.center,
                height: 60.0,
                child: Text(widget.tabKey.toString() + ": List$i"),
            itemCount: 100)
        //onRefresh: onRefresh,
        // )

Step2 #

get current tab key in innerScrollPositionKeyBuilder callback. this key should as same as in step 1 given.

        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.

       onRefresh: onRefresh,
       child: extended.NestedScrollView(
         headerSliverBuilder: (c, f) {
           return _buildSliverHeader(primaryTabBar);

Please see the example app of this for a full example.


  • Fix api error base on Flutter SDK v1.7.8+hotfix.2


  • New ExtendedNestedScrollView still has some issues in special layout, make it as obsolete for now till find a better solution


  • fix issue that Caught error: type 'Future


  • fix issue [0.2.5] for old extended_nested_scroll_view


  • fix issue for quick change page
  • handle unavailable page change(no actived nested positions in it)


  • 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); } }


  • update new extended_nested_scroll_view demo


  • set keepOnlyOneInnerNestedScrollPositionActive default value: false


  • update new ExtendedNestedScrollView readme


  • 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));


  • fix issue: Actived [_NestedScrollPosition] is not right for multiple


  • add new ExtendedNestedScrollView to slove issue more smartly.


  • Update readme.


  • Update demo.


  • Remove unused method.


  • Update demo.


  • Upgrade Some Commments.


  • Initial Open Source release.


example #

extened nested scroll view example

Getting Started #

For help getting started with Flutter, view our online documentation.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  extended_nested_scroll_view: ^0.3.6

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:extended_nested_scroll_view/extended_nested_scroll_view.dart';
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Learn more about scoring.

We analyzed this package on Oct 11, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.5.1
  • pana: 0.12.21
  • Flutter: 1.9.1+hotfix.4


Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Health suggestions

Format lib/src/nested_scroll_view_refresh_indicator.dart.

Run flutter format to format lib/src/nested_scroll_view_refresh_indicator.dart.

Format lib/src/old_extended_nested_scroll_view.dart.

Run flutter format to format lib/src/old_extended_nested_scroll_view.dart.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.68.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.7
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies