RefreshIndicator not shown because of nested CustomScrollView inside bodyContent() about flutter-custom-refresh-indicator

[gonuit]

@willladislaw new package version is available on pub.dev.

To fix your example:

1. depend on:

   dependencies:
     custom_refresh_indicator: 0.9.0

2. Add notificationPredicate argument to CustomRefreshIndicator widget as follow:

   CustomRefreshIndicator(
      notificationPredicate: (notification) => notification.depth == 1,
      // ...
   )

☝️ Now your CustomRefreshIndicator widget will listen only for notifications with dept that equal to 1. It will listen to notifications from CustomScrollView widget.

[gonuit]

Hi @willladislaw!
It's a known issue, and I'm almost sure that it won't work even on the material RefreshIndicator widget 😞.

Let me describe what happens here.

1. You are starting dragging the list.
2. The first list (NestedScrollView) sends scroll notification.
3. Everything looks good. Indicator state changes to dragging.
4. Then, the second list (the nested on => CustomScrollView) starts sending notifications (instead of the first list).
5. Conclusion:
   The indicator doesn't appear because you started scrolling NestedScrollView and ended up scrolling CustomScrollView.

Possible solutions:

• You can wrap CustomScrollView with the CustomRefreshIndicator widget as it is your main list. ← Which is a preferred solution.
• Or, if you for some reason want to place CustomScrollView on top of the NestedScrollView (basically your scrollable app bar) you honestly need to wait for the new version of custom_refresh_indicator (0.9.0) that will introduce notificationPredicate argument that will allow you to listen for the specific depth of scroll notifications.

Let me know if it is what you were looking for.
Have a nice day 😃

[willladislaw]

Thank you so much.

[willladislaw]

...will do later.

[gonuit]

You're welcome 😃
Let me know if that works for you.