我从一个朋友那里下载了一个flutter项目，结果出现了这个错误

Question

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错误：无法使用健全的null安全性运行，因为以下依赖项不支持零安全：

• 软件包：google_fonts
• 包：http
• 程序包：http_parser

有关解决方案，请参阅https://dart.dev/go/unsound-null-safety/C：/src/flutter/packages/flutter/lib/src/material/circle_avatar.dart:108:9:错误：找不到类型"ImageProvider"。最终ImageProvider？背景图像；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/circle_avatar.dart:113:9:错误：找不到类型"ImageProvider"。最终ImageProvider？前景图像；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:185:14:错误：找不到类型"ImageProvider"。所需的ImageProvider图像，^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:336:14:错误：找不到类型"ImageConfiguration"。所需的ImageConfiguration配置，^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:369:3:错误：找不到类型"ImageConfiguration"。ImageConfiguration获取配置=&gt_配置^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:370:3:错误：找不到类型"ImageConfiguration"。图像配置(_configuration)；^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:371:21:错误：找不到类型"ImageConfiguration"。设置配置(ImageConfiguration值){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:210:9:错误：找不到类型"ImageProvider"。最终ImageProvider？activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:219:9:错误：找不到类型"ImageProvider"。最终ImageProvider？inactiveThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:530:9:错误：找不到类型"ImageProvider"。最终ImageProvider？activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:532:9:错误：找不到类型"ImageProvider"。最终ImageProvider？inactiveThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:795:3:错误：找不到类型"ImageProvider"。ImageProvider？get-activeThumbImage=&gt_activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:796:3:错误：找不到类型"ImageProvider"。ImageProvider_activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:797:24:错误：找不到类型"ImageProvider"。设置activeThumbImage(ImageProvider？值){^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:814:3:错误：找不到类型"ImageProvider"。ImageProvider？get-inactiveThumbImage=&gt_inactiveThumbImage；

^^^^^^^^^^^^^^^^^^

/C：/src/flutter/packages/flutter/lib/src/widgets/scroll_aware_image_provider。dart:110:36:错误：找不到类型"解码器回调"。ImageStreamCompleter加载(T密钥，解码器回调解码)=>imageProvider.load(密钥，解码)；^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/widgets/scroll_aware_image_provider。dart:113:23:错误：找不到类型"ImageConfiguration"。未来获取密钥(ImageConfiguration配置)=>imageProvider.gapturenKey(配置)；^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/cupertino/route.dart:915:44:错误：找不到类型"ImageConfiguration"。void paint(画布画布、偏移偏移、ImageConfiguration配置){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/proxy_box.dart:2088:5:错误：找不到类型"ImageConfiguration"。ImageConfiguration configuration=ImageConfiguration.empty，^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/proxy_box.dart:2132:3:错误：找不到类型"ImageConfiguration"。ImageConfiguration获取配置=&gt_配置^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/proxy_box.dart:2133:3:错误：找不到类型"ImageConfiguration"。图像配置(_configuration)；^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/proxy_box.dart:2134:21:错误：找不到类型"ImageConfiguration"。设置配置(ImageConfiguration值){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/table.dart:376:5:错误：找不到类型"ImageConfiguration"。ImageConfiguration configuration=ImageConfiguration.empty，^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/rendering/table.dart:552:3:错误：找不到类型"ImageConfiguration"。ImageConfiguration获取配置=&gt_配置

^^^^^^^^^^^^^

/C：/src/flutter/packages/flutter/lib/src/material/circle_avatar.dart:113:9:错误："ImageProvider"不是类型。最终ImageProvider？前景图像；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/download.dart:81:42:错误：没有为类"_DropdownMenuPainter"定义方法"ImageConfiguration"。

• '_DropdownMenuPainter'来自'package:flutter/src/material/dropload.dart'('/C:/src/flutter/packages/flutter/lib/src/material/download.dart.dart')。请尝试将名称更正为现有方法的名称，或定义名为"ImageConfiguration"的方法。_painter.paint(canvas，rect.topLeft，ImageConfiguration(size:rect.size))；^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:185:14:错误："ImageProvider"不是类型。所需的ImageProvider图像，^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:336:14:错误："ImageConfiguration"不是类型。所需的ImageConfiguration配置，^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:370:3:错误："ImageConfiguration"不是类型。图像配置(_configuration)；^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:371:21:错误："ImageConfiguration"不是类型。设置配置(ImageConfiguration值){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/ink_decoration.dart:394:11:错误："ImageConfiguration"不是类型。final ImageConfiguration sizedConfiguration=configuration.copyWith(^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:210:9:错误："ImageProvider"不是类型。最终ImageProvider？activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:219:9:错误："ImageProvider"不是类型。最终ImageProvider？inactiveThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:530:9:错误："ImageProvider"不是类型。最终ImageProvider？activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:532:9:错误："ImageProvider"不是类型。最终ImageProvider？inactiveThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:796:3:错误："ImageProvider"不是类型。ImageProvider_activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:797:24:错误："ImageProvider"不是类型。设置activeThumbImage(ImageProvider？值){^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:815:3:错误："ImageProvider"不是类型。ImageProvider_inactiveThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:816:26:错误："ImageProvider"不是类型。设置inactiveThumbImage(ImageProvider？值){^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:854:3:错误："ImageConfiguration"不是类型。图像配置_配置^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:855:21:错误："ImageConfiguration"不是类型。设置配置(ImageConfiguration值){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:904:3:错误："ImageProvider"不是类型。ImageProvider_cachedThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:908:60:错误："ImageProvider"不是类型。BoxDecoration _createDefaultThumbDecoration(颜色、ImageProvider？图像、ImageErrorListener？errorListener){^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:950:11:错误："ImageProvider"不是类型。最终ImageProvider？thumbImage=已启用^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch.dart:1018:5:错误："ImageProvider"不是类型。ImageProvider？thumbImage，^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch_list_tile.dart:265:9:错误："ImageProvider"不是类型。最终ImageProvider？activeThumbImage；^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/material/switch_list_tile.dart:270:9:错误："ImageProvider"不是类型。最终ImageProvider？inactiveThumbImage

/C:/src/flutter/packages/fluttstrongtexter/lib/src/painting/image_resolution.dart:283:41:错误："ImageConfiguration"不是类型。未来获取密钥(ImageConfiguration配置){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:291:15:错误："AssetBundleImageKey"不是类型。完成者？完井工；^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:292:12:错误："AssetBundleImageKey"不是类型。将来后果^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:302:15:错误："AssetBundleImageKey"不是类型。final AssetBundleImageKey=AssetBundleImage key(^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:317:38:错误："AssetBundleImageKey"不是类型。result=SynchronousFuture(键)；^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:334:27:错误："AssetBundleImageKey"不是类型。completer=completer()；^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:302:41:错误：没有为类"AssetImage"定义方法"AssetBundleImageKey"。

• "AssetImage"来自"package:flutter/src/ppainting/image_resolution.dart"("/C:/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart")。请尝试将名称更正为现有方法的名称，或定义名为"AssetBundleImageKey"的方法。final AssetBundleImageKey=AssetBundleImage key(^^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/image_resolution.dart:351:39:错误："ImageConfiguration"不是类型。字符串_chooseVariant(String main、ImageConfiguration config、List？candidate){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/shape_decoration.dart:365:35:错误："ImageConfiguration"不是类型。void _paintImage(画布画布，ImageConfiguration配置){^^^^^^^^^^^^^^^^^^/C：/src/flutter/packages/flutter/lib/src/painting/shape_decoration.dart:379:44:错误："ImageConfiguration"不是类型。void paint(画布画布、偏移偏移、ImageConfiguration配置){^^^^^^^^^^^^^^^^^^

失败：生成失败，出现异常。

• 其中：脚本"C:\src\flatter\packages\flutter_tools\gradle\flatter.gradle"行：1156

• 哪里出了问题：任务"：app:compileFlutterBuildDebug"的执行失败。

进程"命令"C:\src\flatter\bin\flatter.bat"以非零退出值1 完成

• 尝试：使用--stacktrace选项运行以获取堆栈跟踪。使用--info或--debug选项运行以获得更多日志输出。使用--scan运行以获得完整的见解。

• 获取更多帮助，请访问https://help.gradle.org

构建在19秒内失败异常：Gradle任务assemblyDebug失败，退出代码为1

Answer 1

您应该安装与朋友使用的相同的flutter版本。我认为你的版本更大。请您的朋友向您发送flutter doctor输出，并使您的颤振版本相同。

FVM可能是一个合适的工具(在不删除自己的版本的情况下安装所需的版本)：https://fvm.app/docs/getting_started/installation

然后简单地运行：

fvm install [version of your friend]
fvm use [version]

Answer 2

您可以禁用空安全并使用以下命令运行项目：

flutter run --no-sound-null-safety