相关疑难解决方法(0)

我ExpansionTile选择一个项目后,我试图崩溃,但它没有关闭打开的列表.

我试图使用该onExpansionChanged属性,但我没有成功

你怎么能解决这个问题？

插入一个演示ExpansionTile在选择项目后不会崩溃的gif ,下面也是使用的代码.

import 'package:flutter/material.dart';

void main() {
  runApp(new ExpansionTileSample());
}

class ExpansionTileSample extends StatefulWidget {
  @override
  ExpansionTileSampleState createState() => new ExpansionTileSampleState();
}

class ExpansionTileSampleState extends State<ExpansionTileSample> {
  String foos = 'One';

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('ExpansionTile'),
        ),
        body: new ExpansionTile(
          title: new Text(this.foos),
          backgroundColor: Theme.of(context).accentColor.withOpacity(0.025),
          children: <Widget>[
            new ListTile(
              title: const Text('One'),
              onTap: () {
                setState(() {
                  this.foos = …

 body: Container(color: Colors.white,
          child: SingleChildScrollView(
              child : Column( 
                children : [
                  Padding(padding: EdgeInsets.only(left : 23.0, top: 23.0, right: 23.0, bottom: 5.0), 
                              child : Text("Title", style: MyTextStyles.textNormal,)),

                  ListView.builder(
                      padding: EdgeInsets.only(left: 13.0, right: 13.0, bottom: 25.0),
                      shrinkWrap: true,
                      physics: NeverScrollableScrollPhysics(),
                      itemCount: PersonModel.icData.length,
                      itemBuilder: (context, index) {
                        PersonModel _model = PersonModel.icData[index];
                        return Column(
                          children: <Widget>[
                            Divider(
                              height: 17.0,
                              color: MyColors.white,
                            ), 
                                  ExpansionTile(
                                        key:  PageStorageKey<String>(index.toString()),
                                        initiallyExpanded: false,
                                        leading: 
                                        new ClipOval(
                                                child: SvgPicture.asset(
                                                    _model.picture,
                                                    height: 57.0,
                                                    width: 57.0,
                                                ),
                                            ),

                                        title: Text(_model.title,style: TextStyle(color: Color(0xFF09216B), fontFamily: …