flutter - 无法在Android Studio中运行Flutter应用

Question

我创建了一个新的flutter项目，运行该项目时出现该错误

Target kernel_snapshot failed: Exception: The value of -DDartDefines is not formatted correctly.
The value must be a JSON-encoded list of strings but was:
[flutter.inspector.structuredErrors=true]
build failed.

FAILURE: Build failed with an exception.

* Where:
Script 'D:\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 882

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'D:\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org
  Exception: Gradle task assembleDebug failed with exit code 1

我试过 flutter 干净，并且出现同样的错误
flutter 医生日志:

D:\flutter\bin\flutter.bat doctor --verbose
[√] Flutter (Channel master, v1.16.4-pre.69, on Microsoft Windows [Version 10.0.18363.959], locale en-US)
    • Flutter version 1.16.4-pre.69 at D:\flutter
    • Framework revision 19e7db585d (4 months ago), 2020-04-01 11:16:01 -0700
    • Engine revision c9506cb8e9
    • Dart version 2.8.0 (build 2.8.0-dev.18.0 eea9717938)

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at C:\Users\user\AppData\Local\Android\sdk
    • Platform android-29, build-tools 29.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

[√] Android Studio (version 4.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 47.1.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[!] VS Code (version 1.47.2)
    • VS Code at C:\Users\user\AppData\Local\Programs\Microsoft VS Code
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.
Process finished with exit code 0

Answer 1

根据flutter医生给您的提示，问题可能与未安装Android Android SDK或未正确配置有关:
Flutter提供了更新Android SDK路径的命令:

flutter config --android-sdk <path-to-your-android-sdk-path>

您可以直接从Android Studio安装它:
要从Android Studio打开SDK Manager，请单击工具> SDK Manager或在工具栏中单击SDK Manager。您可能必须取消选中“隐藏过时的软件包”并安装被视为过时的软件包。
或者，您可以从此链接安装它并按照我之前说的进行配置:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://android-sdk.fr.uptodown.com/windows&ved=2ahUKEwi-itWCkuzqAhXTZTUKHa29CRMQFjACegQIAhAB&usg=AOvVaw1QSSVVMrZzFltXvboDbTeQ