Flutter UI: Two ListView.builders in Expanded Widget

Question

an app should be compatible for different screen formats. The portrait mode is set, therefore the landscape mode does not have to be observed.

The content is arranged in a Column () widget. All content - widgets except both ListView.builder have a fixed height.

Is it possible to arrange both ListView.builder in a widget like Expanded so that both expand evenly on the available space and you can still scroll extra in both?

Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              _showQuestionTheme(),
              _showQuestion(), //ListView.builder, which should expand 
              _showAnswers(), //ListView.builder, which should expand
              _buildAnswerButton(),
              _buildGameStatusTextfields(),
              _progressBarAnswerTimeLeft(),
            ],
          ),

Anirudh Sharma · Accepted Answer · 2020-02-09 13:03:04Z

1

Widgets like a listView always needs a predefined height and width. You can Wrap Listview inside a container and then, Give container a dynamic height: (elements in the list) * (Height of each element) I hope this trick will work for you.

for example:

Container(
height:litems.length*20,
child:ListView.builder
  (
    itemCount: litems.length,
    itemBuilder: (BuildContext ctxt, int index) {
     return Container(height:20,
             child:Text(litems[index]));
    }
  )
)

answered Feb 9, 2020 at 13:03

Anirudh Sharma

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Shruti Ramnandan Sharma · Accepted Answer · 2020-02-09 13:23:31Z

Hope this will work for you :)

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text("LIST VIEW:1",style: TextStyle(fontWeight: FontWeight.bold),),
              SizedBox(height: 20,),
             Expanded(
              //  flex: 1,
               child:Container(
                 decoration: BoxDecoration(
                   border: Border.all(color: Colors.black),
                   color: Colors.green,
                 ), 
                 height: 20,
                 child: ListView.builder(
                   itemCount: 20,
                   itemBuilder: (context, index){
                     return Card(
                       child: ListTile(
                         title: Text("Name"),
                          subtitle: Text("SubNME"),
                        ),
                      );
                    }
                  ),
                )
              ),
              SizedBox(height: 20,),
               Text("LIST VIEW:2",style: TextStyle(fontWeight: FontWeight.bold)),
              SizedBox(height: 20,),
              Expanded(
               child:Container(
                 decoration: BoxDecoration(
                   border: Border.all(color: Colors.black),
                   color: Colors.red,

                 ),

                 height: 20,
                 child: ListView.builder(
                   itemCount: 20,
                   itemBuilder: (context, index){
                     return Card(
                       child: ListTile(
                         title: Text("Title"),
                          subtitle: Text("Subtitle"),
                       ),
                     );
                    }
                  ),
                )
              )
            ],
          ),
        ),
      ),   
    );
  }
}

Mostafa Efafi · Accepted Answer · 2020-02-09 12:40:12Z

0

use this for both ListView:

Container(
        height: MediaQuery.of(context).size.height*0.5,
    child:YOUR_LISTVIEW
)

answered Feb 9, 2020 at 12:40

Mostafa Efafi

80510 silver badges17 bronze badges

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