How To Download Progress Bar Using Flutter Android App

dependencies:
  flutter:
    sdk: flutter
  percent_indicator: ^2.1.5

flutter pub get

import 'package:flutter/material.dart';
import 'package:percent_indicator/linear_percent_indicator.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Downloading...',
      theme: ThemeData(
        primarySwatch: Colors.blue,

        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Downloading...'),
    );
  }
}

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 Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.green,
        title: Text(widget.title),
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(20.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              LinearPercentIndicator(
                width: 250.0,
                lineHeight: 50.0,
                percent: 0.7,
                center: Text(
                  "20.0%",
                  style: new TextStyle(fontSize: 16.0,color: Colors.white, fontStyle: FontStyle.italic),
                ),
                trailing: Icon(Icons.close),
                linearStrokeCap: LinearStrokeCap.butt,
                backgroundColor: Colors.grey,
                progressColor: Colors.green,
              ),
              Padding(padding: EdgeInsets.all(30)),
              Text("Downloading file...",style: new TextStyle(fontSize: 20),),
              Padding(padding: EdgeInsets.all(10)),
              LinearPercentIndicator(
                width: MediaQuery.of(context).size.width - 80,
                animation: true,
                lineHeight: 25.0,
                animationDuration: 9000,
                percent: 0.4,
                center: Text("70.0%"),
                linearStrokeCap: LinearStrokeCap.roundAll,
                progressColor: Colors.pink[200],
              ),
            ],
          ),
        ),
      ),
    );
  }
}