Show bottomSheet beneath bottomNavigationBar

Question

In our app we\'re using a bottomSheet along with a bottomNavigationBar.

The bottomSheet appears above the bottomNavigationBar, is there a way to make it appear underneat

Answer 1

You can combine your popup with the bottom navigation bar using Column and simulate bottom sheet behavior using Expandable:

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

void main() {
  runApp(SampleApp());
}

class SampleApp extends StatefulWidget {
  @override
  _SampleAppState createState() => new _SampleAppState();
}

class _SampleAppState extends State {

  @override
  Widget build(BuildContext context) {
    buildBottomSheet() {
      return Container(
          color: Colors.grey[200],
          child: Column(mainAxisSize: MainAxisSize.min, children: [
            RadioListTile(dense: true, title: Text('Test'), groupValue: 'test', onChanged: (value) {}, value: true),
            RadioListTile(dense: true, title: Text('Test'), groupValue: 'test', onChanged: (value) {}, value: true),
          ]));
    }

    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Sample App'),
        ),
        body: Container(
          color: Colors.green,
        ),
        bottomNavigationBar: ExpandableNotifier(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              ExpandableButton(
                child: SizedBox(height: 50,
                  child: Center(
                    child: Icon(Icons.edit),
                  ),
                ),
              ),
              Expandable(
                expanded: buildBottomSheet(),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

For a production app, consider using SafeArea to add proper padding at the bottom.