使用Android Gradle插件3.1.0不再找到androidJacocoAnt配置

Question

更新到Android Gradle插件3.1.0（从3.0.1）后，我的JaCoCo单元测试覆盖率配置开始在Gradle配置阶段产生错误：

> Configuration with name 'androidJacocoAnt' not found.

项目级build.gradle：

dependencies {
    classpath 'com.android.tools.build:gradle:3.1.0'
    classpath "org.jacoco:org.jacoco.core:0.8.1"
}

模块级build.gradle：

apply plugin: 'jacoco'

...

android {
    buildTypes {
        debug {
            testCoverageEnabled true
        }
    }

    ...
}

task jacocoTestReport(type: JacocoReport) {
    dependsOn 'createDebugCoverageReport'
    dependsOn 'testDebugUnitTest'

    reports {
        xml.enabled = true
        html.enabled = true
        csv.enabled = false
    }

    jacocoClasspath = configurations['androidJacocoAnt']

    def fileFilter = [
            '**/R.class',
            '**/R$*.class',
            '**/BuildConfig.*',
            '**/Manifest*.*',
            '**/*Test*.*',
            'android/**/*.*'
    ]

    def debugTree = fileTree(dir: "${buildDir}/intermediates/classes/debug", excludes: fileFilter)
    def mainSrc = "${project.projectDir}/src/main/java"
    print("${project.projectDir}/src/main/java")

    sourceDirectories = files([mainSrc])
    classDirectories = files([debugTree])
    executionData = fileTree(dir: "$buildDir", includes: [
            "jacoco/testDebugUnitTest.exec",
            "outputs/code-coverage/connected/*coverage.ec"
    ])
}

Answer 1

用不同的插件版本来区分gradle dependencies的输出，似乎是这样

jacocoClasspath = configurations['androidJacocoAnt']

需要改变

jacocoClasspath = configurations['jacocoAnt']

Answer 2

在最新的Android Gradle Plugin 3.1或更高版本中你需要JaCoCo 8.1吗？

问题是在gradle插件中，其中JaCoCo的版本硬编码为0.7.9

解决方法（从2开始的步骤1）：添加到root build.gradle中

buildscript {
    ext {
        jacocoVersion = project.JACOCO_VERSION
    }
    dependencies {
        /* To confirm JaCoCo version run: $ ./gradlew buildEnvironment */
        //region classpath "org.jacoco:org.jacoco.core:${jacocoVersion}"
        /* Resolves issue of incorrect version use in one of jacoco/android plugin inner tasks */
        classpath "org.jacoco:org.jacoco.core:${jacocoVersion}"
        classpath "org.jacoco:org.jacoco.report:${jacocoVersion}"
        classpath "org.jacoco:org.jacoco.agent:${jacocoVersion}"
        //endregion
    }
}

解决方法（从2开始的步骤2）：添加到root build.gradle中

/* Force Jacoco Agent version upgrade */
subprojects {
    configurations.all {
        resolutionStrategy {
            eachDependency { details ->
                if ('org.jacoco' == details.requested.group) {
                    details.useVersion "${jacocoVersion}"
                }
            }
        }
    }
}

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