How to show line chart from data json using flutter - flutter

Question

i will display linechart from the database using datajson with flutter. but the reference that I can use is hardcode data. Please help
import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:charts_flutter/flutter.dart' as charts;
int dataTotal = 0;
class GrafikSpbj extends StatefulWidget {
final List<charts.Series> seriesList;
final bool animate;
GrafikSpbj(this.seriesList, {this.animate});
/// Creates a [LineChart] with sample data and no transition.
factory GrafikSpbj.withSampleData() {
return new GrafikSpbj(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
#override
_GrafikSpbjState createState() => _GrafikSpbjState();
/// Create one series with sample hard coded data.
static List<charts.Series<LinearSales, int>> _createSampleData() {
print(dataTotal);
final desktopSalesData = [
new LinearSales(0, 10),
new LinearSales(1, 50),
new LinearSales(2, 70),
new LinearSales(3, 100),
];
final tableSalesData = [
new LinearSales(0, 20),
new LinearSales(1, 40),
new LinearSales(2, 80),
new LinearSales(3, 100),
];
return [
new charts.Series<LinearSales, int>(
id: 'Desktop',
colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
domainFn: (LinearSales sales, _) => sales.year,
measureFn: (LinearSales sales, _) => sales.sales,
data: desktopSalesData,
),
new charts.Series<LinearSales, int>(
id: 'Tablet',
colorFn: (_, __) => charts.MaterialPalette.red.shadeDefault,
domainFn: (LinearSales sales, _) => sales.year,
measureFn: (LinearSales sales, _) => sales.sales,
data: tableSalesData,
),
];
}
}
class _GrafikSpbjState extends State<GrafikSpbj> {
List data;
Timer timer;
int jumlahData = 0;
Future<List> _getData() async {
final response = await http.get("xxxxxxxxxxxxx");
setState(() {
data = json.decode(response.body);
jumlahData =data.length;
print(data[0]['id_spbj']);
print(data[0]['minggu_ke']);
print(data[0]['hasil']);
print(data[0]['target_grafik']);
});
return json.decode(response.body);
}
// makeRequest() async {
// var response = await http.get(
// 'xxxxxxxxxxxxxxxxxxxxxxx',
// headers: {'Accept': 'application/json'},
// );
// setState(() {
// data = json.decode(response.body);
// jumlahData =data.length;
// });
// }
#override
void initState() {
_getData();
dataTotal = jumlahData;
super.initState();
}
#override
void dispose() {
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: new Text("Input Pelanggan hal 2"),
),
body: Column(
children: <Widget>[
SizedBox(
width: 600.0,
height: 250.0,
child: new charts.NumericComboChart(widget.seriesList,
animate: widget.animate,
defaultRenderer: new charts.LineRendererConfig(),
customSeriesRenderers: [
new charts.PointRendererConfig(customRendererId: 'customPoint')
]),
),
new Text("data"),
new Text("data"),
new Text("data")
],
),
);
}
}
/// Sample linear data type.
class LinearSales {
final int year;
final int sales;
LinearSales(this.year, this.sales);
}
values
[{"id_spbj":"1","minggu_ke":"1","hasil":"13.4353337","target_grafik":"25.00"},{"id_spbj":"1","minggu_ke":"2","hasil":"28.2629147","target_grafik":"25.00"},{"id_spbj":"1","minggu_ke":"3","hasil":"85.3285762","target_grafik":"25.00"},{"id_spbj":"2","minggu_ke":"1","hasil":"32.0184122","target_grafik":"25.00"},{"id_spbj":"2","minggu_ke":"2","hasil":"53.5296934","target_grafik":"25.00"}]

Answer 1

You can use FL_chart plugin library in flutter, where you draw all types of charts.
please find guideline to use FL_Chart