最新版本的Flutter Demo启动报错

[kumanman]

/D:/SDK/flutter_2.10.3/.pub-cache/hosted/mirrors.tuna.tsinghua.edu.cn%2547dart-pub%2547/percent_indicator-4.2.1/lib/linear_percent_indicator.dart:162:5: Warning: The class 'WidgetsBinding' cannot be null.
Try replacing '?.' with '.'
WidgetsBinding?.instance.addPostFrameCallback((_) {
^^^^^^^^^^^^^^
/D:/SDK/flutter_2.10.3/.pub-cache/hosted/mirrors.tuna.tsinghua.edu.cn%2547dart-pub%2547/percent_indicator-4.2.1/lib/linear_percent_indicator.dart:162:30: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/D:/SDK/flutter_2.10.3/packages/flutter/lib/src/widgets/binding.dart').
  Try calling using ?. instead.
  WidgetsBinding?.instance.addPostFrameCallback((_) {
  ^^^^^^^^^^^^^^^^^^^^

FAILURE: Build failed with an exception.

• Where:
  Script 'D:\SDK\flutter_2.10.3\packages\flutter_tools\gradle\flutter.gradle' line: 1102

• What went wrong:
  Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command 'D:\SDK\flutter_2.10.3\bin\flutter.bat'' finished with non-zero exit value 1

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 15s
Exception: Gradle task assembleDebug failed with exit code 1

[Rose0103]

我也是这个问题

[hrxiang]

还没迁移到 3.0。需要等等

[floki2020]

你的sdk 不是2.10.3的嘛，但是我的也是这个问题，请问你的修复好了嘛？

[hrxiang]

最新的是3.0+