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我正在关注 Google 的 Flutter Googlemaps 代码实验室,

https://codelabs.developers.google.com/codelabs/google-maps-in-flutter/#5

G 实验室 说

添加此代码后,您的 IDE(如果您正在使用)应该显示一些红色曲线,因为它引用了一个不存在的同级文件,locations.g.dart。这个生成的文件在无类型 JSON 结构和命名对象之间进行转换。通过运行 build_runner 创建它:

Build runner 应该输出这个:

$ flutter packages pub run build_runner build
[INFO] Generating build script...
[INFO] Generating build script completed, took 291ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 65ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 595ms

[INFO] Running build...
[INFO] 1.2s elapsed, 0/1 actions completed.
[INFO] Running build completed, took 1.2s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 27ms

[INFO] Succeeded after 1.2s with 1 outputs (1 actions)

$
  • 我已将 'build_runner: ^1.2.7' dev_dependency 添加到我的 .yaml 文件中,进行了一些谷歌搜索,在 Android Studio 终端中尝试了各种命令,但没有一个被识别。
  • 我尝试将终端目录从我的应用程序目录更改为 C:/flutter 目录,但仍然无法识别命令。

我不知道该怎么做。在他们从控制台打印出来的光标克拉是 $,它不会出现在 Windows 10 上的 Android Studio 控制台中,所以......混乱。

这是所要求的 .yaml 文件

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  google_maps_flutter: ^0.5.11
  http: ^0.12.0+1
  json_serializable: ^2.0.2


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.3

dev_dependencies:
  pedantic: ^1.4.0
  build_runner: ^1.2.7
  flutter_test:
    sdk: flutter
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1 回答 1

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@i6x86 正确诊断了问题,我没有完全设置 Flutter。我按照这里的说明进行操作:flutter.dev/docs/get-started/install/windows#update-your-path

重新启动Android Studio,瞧,它解决了这个问题。

于 2020-03-30T10:58:52.903 回答