[√] Flutter (Channel stable, 1.22.6, on Microsoft Windows [Version 10.0.17134.2026], locale zh-CN)    • Flutter version 1.22.6 at E:\flutter_windows_v1.12.13+hotfix.6-beta\flutter    • Framework revision 9b2d32b605 (4 weeks ago), 2021-01-22 14:36:39 -0800    • Engine revision 2f0af37152    • Dart version 2.10.5    • Pub download mirror https://pub.flutter-io.cn    • Flutter download mirror https://storage.flutter-io.cn[!] Android toolchain - develop for Android devices (Android SDK version 30.0.1)    • Android SDK at E:\androidSdk    • Platform android-30, build-tools 30.0.1    • Java binary at: D:\softInstall\AndroidStudio\jre\bin\java    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)    X Android license status unknown.      Run `flutter doctor --android-licenses` to accept the SDK licenses.      See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.[!] Android Studio (version 4.0)    • Android Studio at C:\Program Files\Android\Android Studio    X Flutter plugin not installed; this adds Flutter specific functionality.    X Dart plugin not installed; this adds Dart specific functionality.    X Unable to find bundled Java version.    • Try updating or re-installing Android Studio.[!] Android Studio (version 4.1.0)    • Android Studio at D:\softInstall\AndroidStudio    X Flutter plugin not installed; this adds Flutter specific functionality.    X Dart plugin not installed; this adds Dart specific functionality.    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)[√] Connected device (1 available)    • TNY AL00 (mobile) • 2XTGL20403000004 • android-arm64 • Android 10 (API 29)! Doctor found issues in 3 categories.

import 'dart:typed_data';import 'dart:ui';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutter/rendering.dart';import 'dart:async';void main() => runApp(new MyApp());class MyApp extends StatefulWidget {  @override  _MyAppState createState() => new _MyAppState();}class _MyAppState extends State<MyApp> {  GlobalKey _key = new GlobalKey();  String title = "";  @override  void initState() {    super.initState();  }  @override  Widget build(BuildContext context) {    return new MaterialApp(      home: new Scaffold(        appBar: new AppBar(          title: Text(title),          actions: [            MaterialButton(              onPressed: () {                makeImage();              },              child: Text('makeImage'),            )          ],        ),        body: SingleChildScrollView(          child: RepaintBoundary(            key: _key,            child: ListView.builder(              shrinkWrap: true,              physics: BouncingScrollPhysics(),              itemCount: 16,              itemBuilder: picItemBuilder,            ),          ),        ),      ),    );  }  Widget picItemBuilder(BuildContext context, int index) {    return Container(      color: Colors.white,      padding: EdgeInsets.only(top: 10, bottom: 10),      child: Image.network(        "https://bkimg.cdn.bcebos.com/pic/b999a9014c086e06e49a297e01087bf40ad1cbd1?x-bce-process=image/resize,m_lfit,w_268,limit_1/format,f_jpg",      ),    );  }  Future<void> makeImage() async {    RenderRepaintBoundary boundary = _key.currentContext.findRenderObject();    double pix = window.devicePixelRatio;    var image = await boundary.toImage(pixelRatio: pix);    ByteData byteData = await image.toByteData(format: ImageByteFormat.png);    Uint8List pngBytes = byteData.buffer.asUint8List();    setTitle("makeImageDone");  }  setTitle(String title) {    setState(() {      this.title = title;    });  }}

[ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: Exception: operation failed