Java 错误：无法确定任务'；的依赖项：app:preDebugBuild&x27；

我更新到Android Studio 3.0.1，在我的控制台中出现以下错误：

Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :libraries:Jumble:generateDebugSources, :libraries:Jumble:generateDebugAndroidTestSources, :libraries:Jumble:mockableAndroidJar]

Error:Could not determine the dependencies of task ':app:preDebugBuild'.
> Could not resolve all task dependencies for configuration ':app:debugRuntimeClasspath'.
   > Could not resolve project :libraries:Jumble.
     Required by:
         project :app
      > Cannot choose between the following configurations of project :libraries:Jumble:
          - debugRuntimeElements
          - releaseRuntimeElements
        All of them match the consumer attributes:
          - Configuration 'debugRuntimeElements':
              - Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
              - Found com.android.build.api.attributes.BuildTypeAttr 'debug' but wasn't required.
              - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
              - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
              - Found com.android.build.gradle.internal.dependency.VariantAttr 'debug' but wasn't required.
              - Required org.gradle.api.attributes.Usage 'java-runtime' and found compatible value 'java-runtime'.
          - Configuration 'releaseRuntimeElements':
              - Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
              - Found com.android.build.api.attributes.BuildTypeAttr 'release' but wasn't required.
              - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
              - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
              - Found com.android.build.gradle.internal.dependency.VariantAttr 'release' but wasn't required.
              - Required org.gradle.api.attributes.Usage 'java-runtime' and found compatible value 'java-runtime'.

更新后是什么导致此问题？

修复了此问题！ 我的应用程序在根文件夹中没有

build.gradle

文件。 我添加了以下内容，问题已经解决：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

---

如果您有任何模块库，它也应该具有应用程序项目中提到的相同构建类型。 我也在库中添加了这个buildTypes，因为它与应用程序中提到的类型相同

buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug{}
        uat{}
    }

---

它对我有用。

对这个问题没有帮助。你介意指出你到底添加了什么吗？你解决了吗？@JohnSardinha，是的！