I want first ExpansionTile's item default is open. I want to When I click another item, current item is will close. How can I do it?

Question

 body: Container(color: Colors.white,
          child: SingleChildScrollView(
              child : Column( 
                children : [
                  Padding(paddi         


        

Answer 1

Instead of initiallyExpanded: false, you can use initiallyExpanded: index == 0. By doing this you will check the index of your item and if it is 0, it will be expanded initially.

 ListView.builder(itemCount: 10, itemBuilder: (context, index) {
      return ExpansionTile(
        initiallyExpanded: index == 0,
        title: Text('Title #$index'), 
        children:  [
          Text('Expansion #$index'),
        ],
      );
    }),

To collapse ExpandedTile after choosing item you can check following links

Flutter - Collapsing ExpansionTile after choosing an item

Flutter- ExpansionTile expand and collapse on click