connection_status_bar 1.1.5

customizable flutter widget that animates when internet connection changes.

example/lib/main.dart

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      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> {
  @override
  Widget build(BuildContext context) {
    return Material(
      child: Stack(
        children: [
          Align(
            alignment: Alignment.topCenter,
            child: Scaffold(
              appBar: AppBar(
                title: Text(widget.title),
              ),
              body: Center(
                child: Text(
                  'turn off device internet connection to see the widget animating',
                  textAlign: TextAlign.center,
                ),
              ),
            ),
          ),
          Align(
            alignment: Alignment.topCenter,
            child: ConnectionStatusBar(),
          ),
        ],
      ),
    );
  }
}