Expansion Panel with ScrollView

main.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
    color: Color.fromARGB(255, 66, 165, 245),
    alignment: AlignmentDirectional(0.0, 0.0),
    child: Container(
      color: Colors.green,
      constraints: BoxConstraints.expand(),
      child: Card(child:Column(
        children:<Widget>[
          Card(
            color:Colors.yellow,
            child:Column(
              children:<Widget>[
               ExpansionTile(
               title:Text("Title"),
               children:<Widget>[
                 Column(children:<Widget>[
                   Container(
      color: Colors.green,
      child: SingleChildScrollView(
          child: Column(
          children: [
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"),
             Text("Idris"), 
            ],
          ),
      ),
      constraints: BoxConstraints(
          maxHeight: 300.0,
          maxWidth: 200.0,
          minWidth: 150.0,
          minHeight: 150.0
      ),)
                  
                 ])
               ]
               )
              ]
            ),
            
          ),
        ]
      )),
      
    ),
         
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}