如何在颤动中添加圆形图表？

Question

我想在我的 flutter 应用程序中使用这张图片。

Answer 1

// Donut chart example. This is a simple pie chart with a hole in the middle.    


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

class DonutPieChart extends StatelessWidget {
  final List<charts.Series> seriesList;
  final bool animate;

  DonutPieChart(this.seriesList, {this.animate});

  /// Creates a [PieChart] with sample data and no transition.
  factory DonutPieChart.withSampleData() {
    return new DonutPieChart(
      _createSampleData(),
      // Disable animations for image tests.
      animate: false,
    );
  }


  @override
  Widget build(BuildContext context) {
    return new charts.PieChart(seriesList,
        animate: animate,
        // Configure the width of the pie slices to 60px. The remaining space in
        // the chart will be left as a hole in the center.
        defaultRenderer: new charts.ArcRendererConfig(arcWidth: 60));
  }

  /// Create one series with sample hard coded data.
  static List<charts.Series<LinearSales, int>> _createSampleData() {
    final data = [
      new LinearSales(0, 100),
      new LinearSales(1, 75),
      new LinearSales(2, 25),
      new LinearSales(3, 5),
    ];

    return [
      new charts.Series<LinearSales, int>(
        id: 'Sales',
        domainFn: (LinearSales sales, _) => sales.year,
        measureFn: (LinearSales sales, _) => sales.sales,
        data: data,
      )
    ];
  }
}

/// Sample linear data type.
class LinearSales {
  final int year;
  final int sales;

  LinearSales(this.year, this.sales);
}

Answer 2

就用这个插件pie_chart: ^5.1.0

import 'package:pie_chart/pie_chart.dart';

Map<String, double> dataMap = {
    "Flutter": 5,
    "React": 3,
    "Xamarin": 2,
    "Ionic": 2,
  };

PieChart(
      dataMap: dataMap,
      animationDuration: Duration(milliseconds: 800),
      chartLegendSpacing: 32,
      chartRadius: MediaQuery.of(context).size.width / 3.2,
      colorList: colorList,
      initialAngleInDegree: 0,
      chartType: ChartType.ring,
      ringStrokeWidth: 32,
      centerText: "HYBRID",
      legendOptions: LegendOptions(
        showLegendsInRow: false,
        legendPosition: LegendPosition.right,
        showLegends: true,
        legendShape: _BoxShape.circle,
        legendTextStyle: TextStyle(
          fontWeight: FontWeight.bold,
        ),
      ),
      chartValuesOptions: ChartValuesOptions(
        showChartValueBackground: true,
        showChartValues: true,
        showChartValuesInPercentage: false,
        showChartValuesOutside: false,
        decimalPlaces: 1,
      ),
      // gradientList: ---To add gradient colors---
      // emptyColorGradient: ---Empty Color gradient---
    )

如何在颤动中添加圆形图表？

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