Flutter——Checkbox组件、CheckboxListTile（多选框组件）

• Checkbox组件

Checkbox组件常用的属性：

属性	描述
value	true 或者 false
onChanged	改变的时候触发的事件
activeColor	选中的颜色、背景颜色
checkColor	选中的颜色、Checkbox 里面对号的颜色

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    title: "CheckBox",
    home: MyApp(),
  ));
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  var flag = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("CheckBox")),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Checkbox(
                value: this.flag,
                onChanged: (value) {
                  setState(() {
                    this.flag = value;
                  });
                },
                activeColor: Colors.red,
                checkColor: Colors.blue,
              )
            ],
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(this.flag ? "选中" : "未选中")
            ],
          )
        ],
      ),
    );
  }
}

• CheckboxListTile组件

属性	描述
value	true 或者 false
onChanged	改变的时候触发的事件
activeColor	选中的颜色、背景颜色
title	标题
subtitle	二级标题
secondary	配置图标或者图片
selected	选中的时候文字颜色是否跟着改变

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    title: "CheckboxListTile",
    home: MyApp(),
  ));
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  var flag = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("CheckboxListTile")),
      body: CheckboxListTile(
        value: this.flag,
        title: Text("标题"),
        subtitle: Text("这是二级标题"),
        secondary: Icon(Icons.headset_mic),
        selected: this.flag,
        onChanged: (value) {
          setState(() {
            this.flag = value;
          });
        },
      ),
    );
  }
}