Can you change the height of an ExpansionTile in Flutter?

Question

The ExpansionTile inherits from the ListTile, which has a fixed height. There are no input args for tile height.

I've tried wrapping the ExpansionTile in a Container widget with a hardcoded height, but that causes the children widgets to only take up the space within the hardcoded height. Currently, because the contents in the title widget are large, I have a "Column overflowed by 23 pixels" message.

Is there any way to change an Expansion Tile's height? Or is there another Widget I could use that has the expansion/accordion feature?

Answer 1

I would probably copy ExpansionTile and make your own version. Sizing ListTile is easy with a Container or SizedBox, but ExpansionTile is a material widget and it doesn't look like it was built with your use case in mind.

Answer 2

You might want to try this package : configurable_expansion_tile

Example app :

import 'package:flutter/material.dart';
import 'package:configurable_expansion_tile/configurable_expansion_tile.dart';

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

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

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Configurable Expansion Tile Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ConfigurableExpansionTile(
              borderColorStart: Colors.blue,
              borderColorEnd: Colors.orange,
              animatedWidgetFollowingHeader: const Icon(
                Icons.expand_more,
                color: const Color(0xFF707070),
              ),
              headerExpanded:
                  Flexible(child: Center(child: Text("A Header Changed"))),
              header: Container(
                  color: Colors.transparent,
                  child: Center(child: Text("A Header"))),
              headerBackgroundColorStart: Colors.grey,
              expandedBackgroundColor: Colors.amber,
              headerBackgroundColorEnd: Colors.teal,
              children: [
                Row(
                  children: <Widget>[Text("CHILD 1")],
                ),
                Row(
                  children: <Widget>[Text("CHILD 2")],
                )
              ],
            )
          ],
        ),
      ),
    );
  }
}

It should get you the results you wanted.

Hope it helps,

Thanks