Flutter - ListView.builder renders widgets but not scrollable

Question

I have my ListView.builder inside Expanded widget which render widgets correctly on the screen but I cannot scroll the widgets rendered by it.

Widget build(BuildContext context) {
    return Container(
      child: FutureBuilder(
        future: getPostsForUid(),
        builder: (_, snap) {
          return Expanded(
            child: ListView.builder(
              physics: AlwaysScrollableScrollPhysics(),
              shrinkWrap: true,
              itemCount: snap.data.length,
              itemBuilder: (_, index) {
                if (snap.data[index]['post_type'] == 'real_estate') {
                  return realEstate(snap, index);
                }
                else if (snap.data[index]['post_type'] == 'video_sharing') {
                  return videoSharing(snap, index);
                }
                else {
                  return Text('');
                }

              },
            ),
          );
        },
      ),
    );
  }

This renders widgets but there is no overflow but its not Scrollable. Using AlwaysScrollableScrollPhysics, NeverScrollableScrollPhysics, ScrollPhysics in physics doesn't work either. Also tring shrinkWrap as false returns no widgets whatsoever.

Why you are using an Expanded widget as child of a container — Nidheesh MT
– Nidheesh MT, Commented Feb 6, 2021 at 12:40
I do not know how Expanded widget will work without a Flex widget. Try restarting your app first. Can you show us your parent widget of of provided snippet. — Blasanka
– Blasanka, Commented Feb 6, 2021 at 16:10

Stijn2210 · Accepted Answer · 2021-02-06 16:08:05Z

2

The list view thinks it’s bigger, because your container has no fixed height. Try setting the height of the container to MediaQuery.of(context).size.height and the list view will know its bounds.

answered Feb 6, 2021 at 16:08

Stijn2210

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Comments

Hosein Haqiqian · Accepted Answer · 2021-02-23 19:10:39Z

1

it will not scroll while it's shrinkWrap is true.

try this:

ListView.builder(
              physics: AlwaysScrollableScrollPhysics(),
              itemExtent: 'sizeOfeachElement (ex:100)'

and remove Expanded

edited Feb 23, 2021 at 19:10

answered Feb 6, 2021 at 16:06

Hosein Haqiqian

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