Flutter Chart
import 'package:flutter/material.dart' ; import 'package:charts_flutter/flutter.dart' as charts; import 'package:font_awesome_flutter/font_awesome_flutter.dart' ; class HomePage extends StatefulWidget { final Widget child; HomePage ({ Key key, this .child}) : super (key : key); _HomePageState createState () => _HomePageState (); } class _HomePageState extends State < HomePage > { List < charts. Series < Pollution , String >> _seriesData; List < charts. Series < Task , String >> _seriesPieData; List < charts. Series < Sales , int >> _seriesLineData; _generateData () { var data1 = [ new Pollution ( 1980 , 'USA' , 30 ), new Pollution ( 1980 , 'Asia' , 40 ), new Pollution ( 1980 , 'Europe' , 10 ), ]; var data2 = [ new Pollution ( 1985 , 'USA' , 100 ), new Pollution ( 1980 , 'Asia' , 150 ),