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每次我尝试运行 pub get 或 pub upgrade 时,都会返回以下错误:[Working dir: C:\Users\User\AndroidStudioProjects\flutterr_app "C:\Program Files\Dart\dart-sdk\bin\pub.bat" get ) 在这个时候是出乎意料的。进程以退出代码 255][1] 结束

[1]:https ://i.stack.imgur.com/dv09t.jpg即使我尝试打开另一个项目,错误仍然存​​在。实际代码显示如下错误:[错误:URI 目标不存在:'package:flutter/material.dart'。(uri_does_not_exist at [flutterr_app] lib\main.dart:1)][1]

[1]:https ://i.stack.imgur.com/7pPRb.jpg我已经尝试更改 dart 和 android studio 版本,甚至重新安装 Flutter,但问题仍然存在。pubspec.yaml 中的代码 [1]:https ://i.stack.imgur.com/W1e6z.jpg [ 2]:https ://i.stack.imgur.com/tDDoT.jpg [ 3]:https:// /i.stack.imgur.com/TKShA.jpg

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In your project open terminal and write flutter pub get. it should remove all the errors. If not, share your pubspec.yaml code.

It's very common to have this error. Running flutter pub gets all the dependencies.

于 2021-10-17T15:29:02.863 回答
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看起来你的 Dart SDK 路径有问题。打开 Android Studio,转到文件-> 设置。向下滚动到底部并选择语言和框架。点击 dart 并分享你的 Dart SDK 路径。

于 2021-10-18T07:16:40.173 回答