jacoco.gradle

apply plugin: 'jacoco'

android {
    buildTypes {
        debug {
            /**打开覆盖率统计开关**/
            testCoverageEnabled = true
        }
    }
}

//源代码路径，有多少个module，就在这里写多少个路径，如果你只有app一个module，那么就写一个就可以
def coverageSourceDirs = [
        '../src/main/java',
        '../src/main/java',
]

//class文件路径，如果你只有app一个module，那么就写一个就可以
def coverageClassDirs = [
        '../build/intermediates/javac/debug/classes',
        '../build/tmp/kotlin-classes'
]

//Jacoco 版本，建议用这个版本兼容性比较好
jacoco {
    toolVersion = "0.8.2"
}

//生成报告task
task jacocoTestReport(type: JacocoReport) {
    group = "JacocoReport"
    description = "Generate Jacoco coverage reports after running tests."
    reports {
        xml.enabled = true
        html.enabled = true
    }
    println("-------" + buildDir)
    println("-------" + rootDir)
    classDirectories.from = files(files(coverageClassDirs).files.collect {
        println("$rootDir" + it)
        fileTree(dir: "$rootDir" + it,
                // 过滤不需要统计的class文件
                excludes: ['**/R*.class',
                           '**/*$InjectAdapter.class',
                           '**/*$ModuleAdapter.class',
                           '**/*$ViewInjector*.class'
                ])
    })
    sourceDirectories.from = files(coverageSourceDirs)
    executionData.from = files("$buildDir/outputs/code-coverage/coverage.ec")

    doFirst {
        coverageClassDirs.each { path ->
            println("$rootDir" + path)
            new File("$rootDir" + path).eachFileRecurse { file ->
                if (file.name.contains('$$')) {
                    file.renameTo(file.path.replace('$$', '$'))
                }
            }
        }
    }
}

//初始化Jacoco Task
task jacocoInit() {
    group = "JacocoReport"
    doFirst {
        File file = new File("$buildDir/outputs/code-coverage/")
        if (!file.exists()) {
            file.mkdir();
        }
    }
}