10.Flutter如何设置图片背景

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
      home: Scaffold(body:LoginPage())
    ));
}

class LoginPage extends StatelessWidget {
  const LoginPage({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
          image: DecorationImage(
            image:AssetImage("assets/images/bg.jpg"),
            fit:BoxFit.cover,
          ),
        ),
      child:Center(
        child:Text(
          'Hello Wolrd',style:TextStyle(
            fontSize: 22.0, 
            color: Colors.black
          ),
        )
      ),
    );
  }
}