floating_bubble 0.0.4

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  • Changelog
  • Example
  • Installing
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floating_bubble #

Generate a floating widget that sticks to the sides of the screen Usually paired with a Floating action button.

You must use a PreferredSizeWidget, if you know how to get the size of a child without showing it on screen, please raise an issue or send a PR.

Example #

  children: <Widget>[
      child: PreferredSize(
        child: FloatingActionButton(
          child: Icon(Icons.exit_to_app),
            heroTag: "FloatingButton",
            onPressed: () => Navigator.of(context).pop(),
        preferredSize: Size(64.0, 64.0),

[0.0.4] - 15/08/2018. #

  • Support flutter versions over 0.5.1

[0.0.3] - 15/08/2018. #

  • Added an example
  • Formatted with flutter format

[0.0.2] - 11/08/2018. #

  • Stricter linting

[0.0.1] - 11/08/2018. #

  • Initial release


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

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        // This is the theme of your application.
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or press Run > Flutter Hot Reload in IntelliJ). Notice that the
        // counter didn't reset back to zero; the application is not restarted.
        primarySwatch: Colors.blue,
      home: new MyHomePage(title: 'Flutter Demo Home Page'),

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  _MyHomePageState createState() => new _MyHomePageState();

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

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.

  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Stack(
      children: <Widget>[
        new Scaffold(
          appBar: new AppBar(
            // Here we take the value from the MyHomePage object that was created by
            // the App.build method, and use it to set our appbar title.
            title: new Text(widget.title),
          body: new Center(
            // Center is a layout widget. It takes a single child and positions it
            // in the middle of the parent.
            child: new Column(
              // Column is also layout widget. It takes a list of children and
              // arranges them vertically. By default, it sizes itself to fit its
              // children horizontally, and tries to be as tall as its parent.
              // Invoke "debug paint" (press "p" in the console where you ran
              // "flutter run", or select "Toggle Debug Paint" from the Flutter tool
              // window in IntelliJ) to see the wireframe for each widget.
              // Column has various properties to control how it sizes itself and
              // how it positions its children. Here we use mainAxisAlignment to
              // center the children vertically; the main axis here is the vertical
              // axis because Columns are vertical (the cross axis would be
              // horizontal).
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                new Text(
                  'The button in orange is the floating bubble.',
                new Text(
                  'It does the same thing as the scaffold-bound FAB.',
                new Text(
                  'You have pushed the button this many times:',
                new Text(
                  style: Theme.of(context).textTheme.display1,
          floatingActionButton: new FloatingActionButton(
            onPressed: _incrementCounter,
            tooltip: 'Increment',
            child: new Icon(Icons.add),
          ), // This trailing comma makes auto-formatting nicer for build methods.
          child: PreferredSize(
            child: FloatingActionButton(
              backgroundColor: Colors.orange,
              child: const Icon(Icons.add),
              onPressed: _incrementCounter,
            preferredSize: const Size(64.0, 64.0),

Use this package as a library

1. Depend on it

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

  floating_bubble: ^0.0.4

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

Alternatively, your editor might support pub get or 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:floating_bubble/floating_bubble.dart';
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Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.19.0 <3.0.0