1-引入依赖
fl_chart: ^0.35.0 # 折线图2-条形图具体实现
条形图
代码:
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Text(widget.title),
),
body: Container(
height: 200,
width:230,
margin: EdgeInsets.only(top: 20),
padding: const EdgeInsets.all(30),
child: BarChart(
BarChartData(
alignment: BarChartAlignment.spaceAround,// 柱状图的对齐方式
maxY:10,//Y轴的最大值
// 点击可出现提示框
barTouchData: BarTouchData(
enabled: true,
// 修改提示框的样式和展示文字
touchTooltipData: BarTouchTooltipData(
tooltipBgColor:const Color.fromRGBO(255, 237, 142, 1),// 设置弹出框的背景色
tooltipRoundedRadius: 8,//圆角边框
tooltipPadding: const EdgeInsets.all(5), // 内边距
tooltipMargin: 2, // 外边距
maxContentWidth:100, // 提示框的最大宽度
direction:TooltipDirection.top, // 提示框的位置
// 设置弹出框内容
getTooltipItem: (group, groupIndex, rod, rodIndex) {
String myData ="";
if(group.x.toInt()==0){
myData = "第一条数据" ;
}else if(group.x.toInt()==1){
myData = "第二条数据" ;
}else if(group.x.toInt()==2){
myData = "第三条数据" ;
}
// rod.y.toInt() -- 当前y轴的数值
return BarTooltipItem("$myData ${rod.y.toInt()}", const TextStyle(color: Color.fromRGBO(180, 172, 130, 1)));
}
)
),
titlesData: FlTitlesData(
// 纵轴
leftTitles: SideTitles(
showTitles: true, // 是否展示
interval: 5,
margin: 8,
reservedSize: 30,
getTextStyles: (value)=> const TextStyle(
color: Colors.black,
fontSize: 15
) ,
getTitles: (value){
if(value.toInt()==0){
return "0";
}else if(value.toInt() == 5){
return "5";
}else{
return "";
}
},
),
// 横轴
bottomTitles: SideTitles(
showTitles: true,
interval: 5,
margin: 8,
reservedSize: 30,
getTextStyles: (value)=> const TextStyle(
color: Colors.black,
fontSize: 15
) ,
getTitles: (value){
if(value.toInt()==0){
return "1";
}else if(value.toInt() == 1){
return "2";
}else if(value.toInt() == 2){
return "3";
}else{
return "";
}
},
)
),
// 是否展示边框
borderData: FlBorderData(
show: true,
border:Border.all(
color: Colors.black12,
width: 1,
style: BorderStyle.solid
),
),
groupsSpace: 12, // 调整组与组之间的间隔
// 条形图的数据
barGroups: [
BarChartGroupData(
x: 0, // x轴坐标
barRods: [
// [Colors.black,Colors.blue]:渐变
// 一个值为纯色
BarChartRodData(y: 1,colors: [Colors.black,Colors.blue],width: 10)
]
) ,
BarChartGroupData(
x: 1,
barRods: [
BarChartRodData(y: 6,colors: [Colors.black,Colors.blue],width: 10)
]
) ,
BarChartGroupData(
x: 2,
barRods: [
BarChartRodData(y: 8,colors: [Colors.black,Colors.blue],width: 10)
]
) ,
],
),
swapAnimationDuration: const Duration(microseconds: 500),
swapAnimationCurve: Curves.easeInOut,
),
)
);
}
}组合条形图
// 条形图的数据
barGroups: [
BarChartGroupData(
x: 0, // x轴坐标
barsSpace: 0, // 一个坐标中条形之间的间隔
barRods: [
// [Colors.black,Colors.blue]:渐变
// 一个值为纯色
BarChartRodData(y: 3,colors: [Colors.black12,Colors.blue],width: 10),
BarChartRodData(y: 4,colors: [Colors.yellow,Colors.green],width: 10)
]
) ,
BarChartGroupData(
x: 1,
barsSpace: 0, // 一个坐标中条形之间的间隔
barRods: [
BarChartRodData(y: 6,colors: [Colors.black12,Colors.blue],width: 10),
BarChartRodData(y: 7,colors: [Colors.yellow,Colors.green],width: 10)
]
) ,
BarChartGroupData(
x: 2,
barsSpace: 0, // 一个坐标中条形之间的间隔
barRods: [
BarChartRodData(y: 8,colors: [Colors.black12,Colors.blue],width: 10),
BarChartRodData(y: 6,colors: [Colors.yellow,Colors.green],width: 10)
]
) ,
], fl_charts:折线图Flutter实战-折线图(fl_chart)-CSDN博客
标签：10,colors,return,--,toInt,chart,width,Colors,fl From： https://blog.csdn.net/weixin_53468073/article/details/137611105