nash0x7e2/animated-list-demo

Project files form my upcoming article on Flutter's Animated List

Flutter Animated List Demo

This repo is the companion to my article on using Flutter's Animated List.

Read article at: https://medium.com/flutter-community/the-magic-of-animatedlist-18afb2ba564c

animated-list-demo's Issues

If I have several parts in a page that need to use AnimatedList, what should I do?

Thanks for your sharing, I have benefited a lot from it.If I have several parts in a page that need to use AnimatedList, what should I do?

  Widget singleRoomDevides(room, signal) {
    final GlobalKey<AnimatedListState> _listKey = GlobalKey();
    return Container(
        child: Column(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        Padding(
          padding: EdgeInsets.only(top: 10.0, bottom: 10.0),
          child: Text(room['room_name'],
              style: TextStyle(
                  fontSize: ScreenUtil().setSp(26, false),
                  color: Color(0xff7D80A2))),
        ),
        Flexible(
          child: SafeArea(
            child: AnimatedList(
              key: _listKey,
              initialItemCount: room['devices'].length,
              itemBuilder:
                  (BuildContext context, int index, Animation animation) {
                return ScaleTransition(
                  scale: animation,
                  child: _singleDeviceCard(
                      room['room_id'], room['devices'][index], signal),
                );
              },
            ),
          ),
        )
      ],
    ));
  }

just like the above code show,I have several singleRoomDevides widget in my page, the _singleDeviceCard widget is a normal widget。

I get the following error:

flutter: Another exception was thrown: Vertical viewport was given unbounded height.
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#b6ace NEEDS-LAYOUT NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#b6ace NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderIgnorePointer#66c76 relayoutBoundary=up13 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderSemanticsAnnotations#c86fc relayoutBoundary=up12 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderPointerListener#e71b4 relayoutBoundary=up11 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderSemanticsGestureHandler#3bf80 relayoutBoundary=up10 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: _RenderScrollSemantics#aa75d relayoutBoundary=up9 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderPadding#3f9c7 relayoutBoundary=up8 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#e50a7 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#12023 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#42612 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#9ee0a NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#6a464 NEEDS-PAINT
flutter: Another exception was thrown: RenderBox was not laid out: RenderViewport#b6ace NEEDS-PAINT

Do you know how to fix it? Thank you.