animation always restarts in Listview.builder

[hibbert-de]

Hi, i want to to add a flutter animation at the first item of a listview. so i decided to take a Listview.builder. The page is a statefull widget because i have to update the listview sometimes if a new event arrives over a websocket.

so i tried this one here:

ListView.builder(
            itemCount: _events.length,
            padding: const EdgeInsets.all(15.0),
            itemBuilder: (context, position) {
              return position == 0 && _events[position].eventID >= 0
                  ? makeFirstCard(_events[position])
                  : makeCard(_events[position]);
            });
//...
makeFirstCard(GameEvent event) {
    return Card(
      elevation: 1.0,
      margin: new EdgeInsets.symmetric(horizontal: 5.0, vertical: 6.0),
      child: Container(
        width: double.infinity,
        child: Row(
          children: <Widget>[
            Expanded(
                flex: 0,
                child: Container(
                    width: 100,
                    height: 100,
                    child: FlareActor(
                      "assets/animations/dummy.flr",
                      animation: "dummy",
                    ))),
// some other text fields...
          ],
        ),
      ),
    );
  }

if i just scroll down a little bit the animation is starting from beginning. is it possible to have a animation in a listview.builder or is there a better way to do this? the length of items is dynamic and will change while the user is on this page.

[edit] this only appears on touch down the listview. after touch down, holding and moving the list the animation works as expected. [/edit]

thanks. phil

Pubspec

flare_flutter: ^1.8.3

Flutter Doctor

Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel master, v1.13.7-pre.8, on Mac OS X 10.15.3 19D76, locale de-DE)

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[jeanmatthieud]

I have the same issue with a "SingleChildScrollView", and "physics" set to "AlwaysScrollableScrollPhysics()". The FlareActor is rebuilt and the animation restarts. How to avoid this behavior ? Is it a bug or the normal behavior ? I thought that the FlareActor will properly manage the animation state.

[devplanet-dp]

Any solution?

[p4-k4]

1 year later...