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main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      width: MediaQuery.of(context).size.width / 1.5,
      height: 150.0,
      decoration: BoxDecoration(
        color: Colors.blue.shade100,
        border: Border(
          left: BorderSide(
            width: 5.0,
            color: Colors.blueAccent,
          ),
        ),
      ),
      child: ListTile(
        title: Padding(
          padding: const EdgeInsets.symmetric(vertical: 8.0),
          child: Text('》What is Lorem Ipsum?', style: Theme.of(context).textTheme.headline5,),
        ),
        subtitle: Text("Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.", style: Theme.of(context).textTheme.bodyText2),
      ),
    );
  }
}