求助：Android应用Gradle构建失败（Android Studio 3.1 Canary 8）

Hey there, let's work through that Gradle build failure you're facing with Android Studio 3.1 Canary 8. Since you noted the issue links back to your app-level build.gradle and gradle-wrapper.properties files, here are targeted fixes to test out:

• Check Gradle Wrapper Version Compatibility
  Open your gradle-wrapper.properties file and verify the distributionUrl value. Android Studio 3.1 Canary 8 requires a matching Gradle version—typically Gradle 4.4 or newer. A valid entry should look like this:

  distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
  

  Mismatched Gradle and Android Studio versions are one of the top causes of build failures in early access builds.

• Validate Android Gradle Plugin Version
  In your app-level build.gradle (inside the buildscript block), make sure the plugin version matches your Canary 8 installation. It should be:

  dependencies {
      classpath 'com.android.tools.build:gradle:3.1.0-alpha08'
  }
  

  Also, confirm you’ve added the google() repository to the buildscript > repositories section—this is mandatory to pull the latest plugin versions.

• Sync SDK and Build Tools Versions
  Double-check compileSdkVersion and buildToolsVersion in your app’s build.gradle. For example, if you’re targeting SDK 27, use a compatible build tools version like 27.0.3:

  android {
      compileSdkVersion 27
      buildToolsVersion "27.0.3"
      // ... rest of your configuration
  }
  

  Mismatched SDK and build tools versions often trigger obscure build errors.

• Clear Caches and Rebuild from Scratch
  Cached data can cause unexpected failures—try these steps:

  1. Go to Build > Clean Project in Android Studio
  2. Follow up with Build > Rebuild Project
  3. If that doesn’t fix it, manually delete the .gradle folder in your project root and your user home directory (e.g., ~/.gradle on macOS/Linux, C:\Users\YourName\.gradle on Windows), then re-sync your project.

• Resolve Dependency Conflicts
  Run ./gradlew app:dependencies in your project root to generate a dependency tree. Look for duplicate or conflicting library versions (like two different support library releases). You can fix these using exclude or force directives in your dependencies block.

If you’re still stuck, zero in on specific error messages in your build log—common issues include missing repositories, incompatible third-party libraries, or typos in your config files.

内容的提问来源于stack exchange，提问作者Betty Elias