Question

我的flutter doctor -v

[✓] Flutter (Channel master, v0.5.9-pre.68, on Linux, locale en_US.UTF-8)
    • Flutter version 0.5.9-pre.68 at /home/khophi/.flutterSetup
    • Framework revision 5cd97f0004 (2 hours ago), 2018-08-16 14:10:22 -0700
    • Engine revision 4ee648914f
    • Dart version 2.1.0-dev.0.0.flutter-be6309690f

[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at /home/khophi/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-27, build-tools 27.0.3
    • ANDROID_HOME = /home/khophi/Android/sdk
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_171-8u171-b11-0ubuntu0.18.04.1-b11)
    • All Android licenses accepted.

[✗] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.io/setup/#android-setup for detailed instructions).

[✓] VS Code (version 1.26.0)
    • VS Code at /usr/share/code
    • Flutter extension version 2.17.1

[✓] Connected devices (1 available)
    • klte • 956e8b90 • android-arm • Android 8.1.0 (API 27)

! Doctor found issues in 1 category.

运行flutter run时，我得到：

Running "flutter packages get" in townsquare...                  
The current Dart SDK version is 2.1.0-dev.0.0.flutter-be6309690f.

Because flutter_circular_chart 0.0.3 requires SDK version >=1.19.0 <2.0.0 and no versions of flutter_circular_chart match >0.0.3 <0.1.0, flutter_circular_chart ^0.0.3 is forbidden.
So, because mobile depends on flutter_circular_chart ^0.0.3, version solving failed.

pub get failed (1)

这是我的pubspec.yaml

name: mobile
description: A new Flutter project.

version: 1.0.0+1

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  carousel: ^0.0.1
  http: "^0.11.3+16"
  validate: "^1.6.0"
  url_launcher: "^3.0.2"
  shared_preferences: "^0.4.2"
  font_awesome_flutter: "^7.0.0"
  flutter_circular_chart: "^0.0.3"
  flutter_local_notifications: ^0.3.6

dev_dependencies:
  flutter_test:
    sdk: flutter

  assets:
   - images/flutter.jpg
   - images/logo.png
   - images/bg_viewer.jpg

以上所述，请赐教，怎么了？

Answer 1

那是因为您使用的是：Dart version 2.1.0-dev.0.0.flutter-be6309690f并且名为flutter_circular_chart的插件具有constraint

https://github.com/xqwzts/flutter_circular_chart/blob/master/pubspec.yaml

environment:
   sdk: '>=1.19.0 <2.0.0'

您可以派生项目并更新sdk约束并引用到您的存储库：

赞：

flutter_circular_chart:
    git: https://github.com/your_repo/flutter_circular_chart.git

注意如果您在他们的仓库中打开一个问题来通知开发人员您遇到的问题，也可以。

Answer 2

使用具有相同版本的 devendency_override，其他依赖项也需要相同的版本。

像 google_maps_flutter：^0.5.28+1 需要 intl 为 0.16.0

然后创建dependency_overrides：国际：^0.16.0

dev_dependencies 的下面：颤振测试： sdk：颤动

运行项目直到它不在设备上运行。

享受。谢谢..

升级后颤振无法运行应用程序版本解析失败

2 个答案: