Image.memory() doesn't render on the web #53783
Description
Steps to Reproduce
- Run the following code on macOS:
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) => MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(primarySwatch: Colors.blue),
home: MyHomePage(),
);
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final url = 'https://i.ytimg.com/vi/46a97ejExuY/hqdefault.jpg';
Uint8List data;
@override
void initState() {
http.get(url).then((res) => setState(() => data = res.bodyBytes));
super.initState();
}
@override
Widget build(BuildContext context) => Scaffold(
appBar: AppBar(title: Text('Flutter Demo Home Page')),
body: Row(
children: [
Expanded(child: data == null ? Container() : Image.memory(data)),
Expanded(child: Image.network(url)),
],
),
);
}It shows the Image from memory as well as from the URL:
- Run the same code on the web and the Image from memory doesn't show:
I expect the web version to work just like the macOS version.
Neither the web nor the macOS version have any runtime exceptions or debug logging output.
➜ flutter doctor --verbose
[✓] Flutter (Channel master, v1.16.4-pre.48, on Mac OS X 10.15.4 19E266, locale
en-US)
• Flutter version 1.16.4-pre.48 at /Users/csells/flutter
• Framework revision 572680e9d2 (23 hours ago), 2020-03-31 17:36:02 -0400
• Engine revision fc5b44c901
• Dart version 2.8.0 (build 2.8.0-dev.18.0 e8c4aed700)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/csells/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling
support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
1.8.0_212-release-1586-b4-5784211)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.4)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.4, Build version 11E146
• CocoaPods version 1.8.4
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 3.6)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 43.0.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build
1.8.0_212-release-1586-b4-5784211)
[✓] VS Code (version 1.43.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.8.1
[✓] Connected device (3 available)
• macOS • macOS • darwin-x64 • Mac OS X 10.15.4 19E266
• Chrome • chrome • web-javascript • Google Chrome 80.0.3987.149
• Web Server • web-server • web-javascript • Flutter Tools
• No issues found!