Trượt ListView về cuối danh sách khi thêm một item mới

 import 'package:flutter/foundation.dart';

import 'package:flutter/material.dart';

import 'package:flutter/scheduler.dart';

void main() {

runApp(MyApp());

}

class MyApp extends StatefulWidget {

MyApp({Key key}) : super(key: key);

@override

_MyAppState createState() => _MyAppState();

}

class _MyAppState extends State<MyApp> {

List<String> data;

ScrollController _scrollController = ScrollController();

@override

void initState() {

super.initState();

data = List<String>.generate(5, (i) => 'Item $i');

}

void scrollToEnd() async {

print(_scrollController.position.maxScrollExtent.toString());

await _scrollController.animateTo(

_scrollController.position.maxScrollExtent,

duration: const Duration(milliseconds: 300),

curve: Curves.easeOut);

}

@override

Widget build(BuildContext context) {

return MaterialApp(

home: Scaffold(

appBar: AppBar(

title: Text('Scroll ListView 2'),

),

body: SafeArea(

child: Column(

children: [

Expanded(

child: Container(

child: ListView.builder(

controller: _scrollController,

itemCount: data.length,

itemBuilder: (context, index) {

return ListTile(

title: Text(data[index]),

);

},

),

),

),

Container(

height: 80,

color: Colors.blue,

),

],

),

),

floatingActionButton: FloatingActionButton(

onPressed: () {

setState(() {

data.add('Item ' + data.length.toString());

});

// scrollToEnd();

SchedulerBinding.instance

.addPostFrameCallback((_) => scrollToEnd());

},

child: Icon(Icons.send),

),

),

);

}

}

scroll