import 'package:flutter/material.dart';

class Custom_Image extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(title: Text("flutter demo")), body: HomeContent()));
  }
}

class HomeContent extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Center(
      child: Container(
        child: Image.network(
          "/fileUpload/98036fd5-fb4b-4c81-a872-0a8c9bb9c65a.jpg",
          alignment: Alignment.topLeft,
          color: Colors.red,
          colorBlendMode: BlendMode.colorDodge,
          // repeat: ImageRepeat.repeatX, fit: BoxFit.cover,
        ),
        width: 300.0,
        height: 400.0,
        decoration: BoxDecoration(color: Colors.yellow),
      ),
    );
  }
}

如果现实不了图片可以在 android\app\src\main\AndroidManifest.xml 添加

    <uses-permission android:name="android.permission.READ_PHONE_STATE" /> 
    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />