incorrect use of parent data widget. expanded widgets must be placed inside flex widgets

Question

You should use Expanded only within a column, row or flex.

In this case just removing Expanded or wrapping it in a Column should fix the problem.

An Expanded widget must be a descendant of a Row, Column, or Flex

The fix for this above issue, is to move the expanded widget inside a flex widget. Example below.

Row(
    children: [
      Expanded(
        child: Column(
          children: [
            Container(
              padding: EdgeInsets.only(bottom: 8.0),
              child: Text(
                "Some Lage Somthing",
                style: TextStyle(fontWeight: FontWeight.bold),
              ),
            ),
            Text("Someplace, Country")
          ],
        ),
      ),
      Icon(Icons.star)
    ],
  ),
);

Happy Fluttering!

First Rule: use Expanded only within a column, row or flex.

Second Rule: Parent column that have expanded child column must be wrapped with expanded as well

there are may things to get this problem

1. Under ListView don't use Spacer Widget
2. don't use Positiond under Row or Column
3. Expanded can only use it must be a descendant of column row Flex

there's no expanded in my code so i found that using Spacer() too can cause this error if it's inside a listview

In my case, I was using Positioned inside a column. Removing it solved the problem!