expandable_app_bottom_bar 0.0.1

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  • Changelog
  • Example
  • Installing
  • 65

Expandable Bottombar #

An expandable bottom bar.

Allows to have a custom app bottom bar. Which allow to have a hidden content that can be displayed by dragging up.

Screenshots #

Getting Started #


  • barButtons allows to pass a widget (typically a row) that contains the buttons which will handle the app bar functionality.
  • child widget that contains the hidden content.
  • scaffoldChild widget that contains the hidden content, but this hidden content is wrapped inside a Scaffold widget. Only child or scaffoldChild is allow no both at same time.
  • opacity the oppacity of hidden content.
  • stopOnDrag if true when the user stops dragging the hidden content will stay visible if false the hidden content will be expanded/narrowed to the top or the end of the screen and then disappear.
  • autoHide hides the app bottom bar while the user is dragging the hidden content.
import 'package:flutter/material.dart';

import 'package:flutter/services.dart';
import 'package:expandable_bottom_bar/expandable_bottom_bar.dart';

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

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      routes: <String, WidgetBuilder>{
        '/': (BuildContext context) => MyHomePage(title: 'Demo'),
        '/second': (BuildContext context) => SecondPage(),

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

  final String title;

  _MyHomePageState createState() => _MyHomePageState();

class _MyHomePageState extends State<MyHomePage> {

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        brightness: Brightness.dark,
        backgroundColor: Colors.pink,
      body: Container(
        color: Colors.white24,
      bottomNavigationBar: ExpandableBottomBar(
        autoHide: true,
        stopOnDrag: false,
        child: SomeImage(),
        color: Colors.green,
        barButtons: Container(
          color: Colors.pink,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
                onPressed: () {
                  print('onPressed <-');
                child: Icon(Icons.arrow_back),
                child: Icon(Icons.arrow_forward),
                onPressed: () {
                  print('onPressed ->');

class SomeImage extends StatelessWidget {
  const SomeImage({Key key}) : super(key: key);

  Widget build(BuildContext context) {
    return Container(
      color: Colors.yellow[400],
      child: Column(
        children: <Widget>[
            constraints: BoxConstraints(maxHeight: 200),
            child: Image.network(
            child: Text('Main content', style: TextStyle(fontSize: 40)),
            child: Text('Press'),
            onPressed: () {

0.0.1 #

  • First release, includes functionality for dragging the hidden content.
  • Allows to hide the content on double tap
  • Animate the hidden content all up or down.


expandable_bottom_bar_example #

Demonstrates how to use the expandable_bottom_bar plugin.

Getting Started #

This project is a starting point for a Flutter application.

A few resources to get you started if this is your first Flutter project:

For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  expandable_app_bottom_bar: ^0.0.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:expandable_app_bottom_bar/app_context_values.dart';
import 'package:expandable_app_bottom_bar/drag_bloc.dart';
import 'package:expandable_app_bottom_bar/dragging_direction.dart';
import 'package:expandable_app_bottom_bar/expandable_bottom_bar.dart';
import 'package:expandable_app_bottom_bar/handler_helper.dart';
import 'package:expandable_app_bottom_bar/hidden_content.dart';
import 'package:expandable_app_bottom_bar/model.dart';
import 'package:expandable_app_bottom_bar/position_handlers.dart';
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Learn more about scoring.

We analyzed this package on Feb 27, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.5
  • Flutter: 1.12.13+hotfix.8

Health suggestions

Format lib/app_context_values.dart.

Run flutter format to format lib/app_context_values.dart.

Format lib/expandable_bottom_bar.dart.

Run flutter format to format lib/expandable_bottom_bar.dart.

Format lib/model.dart.

Run flutter format to format lib/model.dart.

Maintenance suggestions

The package description is too short. (-20 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of 0.0.*, it might mean that the author is still experimenting with the general direction of the API.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
quiver_hashcode ^2.0.0 2.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies