我安装了Flutter并设置了Android Studio。然后我在GitHub (https://github.com/flutter/flutter)上克隆了一个flutter的例子，并在Android Studio中启动它，但它警告我“Dart SDK未配置”，这也发生在我的同事身上。但如果我在Android Studio中创建一个新项目，就完全没有问题。

我所做的:

安装了颤振 安装了Android Studio，以及Flutter插件，包括Dart插件 在命令行中颤振运行正常，所有五个测试都通过了。(见下文)

[✓] Flutter (on Mac OS X 10.13.3 17D47, locale en-US, channel dev) • Flutter version 0.0.22 at /Users/katelyn/flutter • Framework revision 3001b3307d (7 days ago), 2018-01-30 11:37:15 -0800 • Engine revision 8f2d72b183 • Tools Dart version 2.0.0-dev.16.0 • Engine Dart version 2.0.0-edge.7af4db0ea091dddca6b2da851e6dda8d7f9467e8 [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3) • Android SDK at /Users/katelyn/Library/Android/sdk • Android NDK location not configured (optional; useful for native profiling support) • Platform android-27, build-tools 27.0.3 • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08) [✓] iOS toolchain - develop for iOS devices (Xcode 9.2) • Xcode at /Applications/Xcode.app/Contents/Developer • Xcode 9.2, Build version 9C40b • ios-deploy 1.9.2 • CocoaPods version 1.4.0 [✓] Android Studio (version 3.0) • Android Studio at /Applications/Android Studio.app/Contents • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08) [✓] Connected devices • Android SDK built for x86 • emulator-5554 • android-x86 • Android 7.1.1 (API 25) (emulator)

上周，我可以通过命令行运行他们的例子(在那个目录下)，

flutter run 

但现在我显示一些错误与Gradle。

Launching lib/main.dart on Android SDK built for x86 in debug mode... Initializing gradle... 0.7s Resolving dependencies... Error running Gradle: Exit code 1 from: /Users/katelyn/AndroidStudioProjects/flutter/examples/flutter_gallery/android/gradlew app:properties: FAILURE: Build failed with an exception. Where: Build file '/Users/katelyn/AndroidStudioProjects/flutter/examples/flutter_gallery/android/app/build.gradle' line: 20 What went wrong: A problem occurred evaluating project ':app'. 3 Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Get more help at https://help.gradle.org BUILD FAILED in 0s Please review your Gradle project setup in the android/ folder.