Flutter运行开源项目money_manager编译失败，求助解决方案

报错信息 #

警告：/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/fl_chart-0.40.2/lib/src/chart/pie_chart/pie_chart.dart:42:20: Warning: Operand of null-aware operation '?.' has type 'WidgetsBinding' which excludes null.

• 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart').
  package:flutter/…/widgets/binding.dart:1
  WidgetsBinding.instance?.addPostFrameCallback((_) {
  ^

错误：/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/platform-3.0.2/lib/src/interface/local_platform.dart:46:19: Error: Member not found: 'packageRoot'.
io.Platform.packageRoot; // ignore: deprecated_member_use
Failed to compile application.

解决步骤 #

1. 修复platform包的packageRoot错误

该错误源于platform:3.0.2依赖调用了Flutter已移除的废弃API，需升级到兼容版本：

• 打开项目根目录的pubspec.yaml，添加依赖覆盖：

  dependency_overrides:
    platform: ^3.1.0
  

• 执行命令更新依赖：

  flutter pub get
  

2. 修复fl_chart的空安全警告

旧版fl_chart:0.40.2的空安全写法与高版本Flutter不兼容，升级包即可解决：

• 在pubspec.yaml的dependencies块中更新fl_chart版本：

  dependencies:
    fl_chart: ^0.65.0 # 可选择更高的兼容稳定版本
  

• 再次执行flutter pub get同步依赖

3. 清理缓存重新编译（可选）

若上述操作后仍有异常，执行以下命令清理缓存后重试：

flutter clean
flutter pub get
flutter run

内容的提问来源于stack exchange，提问作者NorthernEagle