How To Create Horizontal Bar Charts In Flutter Android App

Posted By Bajarangi soft , Posted On 08-10-2020

To draw charts in flutter,

Horizontal Bar Charts

Step 1:
We cannot directly remove the time stamp from Horizontal Bar Charts but using the intl.dart package we can easily filter the date stamp from time stamp. So open your flutter project’s pubspec.yaml in code

dependencies:
  flutter:
    sdk: flutter
  charts_flutter: ^0.9.0

step 2:
After done saving the pubspec.yaml file, Open your flutter project root folder in Command Prompt or Terminal and execute flutter pub get command.

flutter pub get

Step 3:
Open your project’s main.dart file and import material.dart and charts_flutter: ^0.9.0. dart package.

import 'dart:math';
import 'package:charts_flutter/flutter.dart' as charts;

Step 4:
Complete Code For Horizontal Bar Charts Short In Flutter
Main.dart

import 'package:flutter/material.dart';
import 'dart:math';
import 'package:charts_flutter/flutter.dart' as charts;

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
        home: Scaffold(
            body: Center(
                child: Charts()
            )
        )
    );
  }
}


class Charts extends StatefulWidget {
  //
  Charts() : super();

  final String title = "Charts Demo";

  @override
  ChartsState createState() => ChartsState();
}

class ChartsState extends State<Charts> {
  //
  List<charts.Series> seriesList;

  static List<charts.Series<Sales, String>> _createRandomData() {
    final random = Random();

    final desktopSalesData = [
      Sales('2016', random.nextInt(100)),
      Sales('2017', random.nextInt(50)),
      Sales('2018', random.nextInt(40)),
      Sales('2019', random.nextInt(50)),
      Sales('2020', random.nextInt(100)),
    ];

    final tabletSalesData = [
      Sales('2016', random.nextInt(100)),
      Sales('2017', random.nextInt(100)),
      Sales('2018', random.nextInt(100)),
      Sales('2019', random.nextInt(100)),
      Sales('2020', random.nextInt(100)),
    ];

    final mobileSalesData = [
      Sales('2016', random.nextInt(100)),
      Sales('2017', random.nextInt(50)),
      Sales('2018', random.nextInt(100)),
      Sales('2019', random.nextInt(100)),
      Sales('2020', random.nextInt(120)),
    ];

    return [
      charts.Series<Sales, String>(
        id: 'Sales',
        domainFn: (Sales sales, _) => sales.year,
        measureFn: (Sales sales, _) => sales.sales,
        data: desktopSalesData,
        fillColorFn: (Sales sales, _) {
          return charts.MaterialPalette.deepOrange.shadeDefault;
        },
      ),
      charts.Series<Sales, String>(
        id: 'Sales',
        domainFn: (Sales sales, _) => sales.year,
        measureFn: (Sales sales, _) => sales.sales,
        data: tabletSalesData,
        fillColorFn: (Sales sales, _) {
          return charts.MaterialPalette.pink.shadeDefault;
        },
      ),
      charts.Series<Sales, String>(
        id: 'Sales',
        domainFn: (Sales sales, _) => sales.year,
        measureFn: (Sales sales, _) => sales.sales,
        data: mobileSalesData,
        fillColorFn: (Sales sales, _) {
          return charts.MaterialPalette.indigo.shadeDefault;
        },
      )
    ];
  }

  barChart() {
    return charts.BarChart(
      seriesList,
      animate: true,
      vertical: false,
      barGroupingType: charts.BarGroupingType.grouped,
      defaultRenderer: charts.BarRendererConfig(
        groupingType: charts.BarGroupingType.grouped,
        strokeWidthPx: 4.0,
      ),
      domainAxis: charts.OrdinalAxisSpec(
        renderSpec: charts.NoneRenderSpec(),
      ),
    );
  }

  @override
  void initState() {
    super.initState();
    seriesList = _createRandomData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        leading: Icon(Icons.menu),
        backgroundColor: Colors.red,
        title: Text(widget.title),
      ),
      body: Container(
        padding: EdgeInsets.all(15.0),
        child: barChart(),
      ),
    );
  }
}

class Sales {
  final String year;
  final int sales;
  Sales(this.year, this.sales);
}