jacoco.gradle

repositories {
    mavenCentral()
}

apply plugin: 'jacoco'

// Specify latest jacoco, else use default
jacoco {
    version '0.7.5.201505241946'
}

task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest']) {
    group = 'Reporting'
    description = 'Generate Jacoco coverage reports after running tests.'

    reports {
        xml {
            enabled true // coveralls
            destination "${project.buildDir}/reports/jacoco/test/jacocoTestReport.xml"
        }

        html {
            enabled true
            destination "${project.buildDir}/reports/jacoco/test/html"
        }
    }

    // use hidden configuration, for details look into JacocoPlugin.groovy
    jacocoClasspath = project.configurations['androidJacocoAnt']

    // exclude auto-generated classes and tests
    def fileFilter = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*',
                      'android/**/*.*']
    def debugTree = fileTree(dir: "${project.buildDir}/intermediates/classes/debug", excludes: fileFilter)
    def mainSrc = "${project.projectDir}/src/main/java"

    sourceDirectories = files([mainSrc])
    classDirectories = files([debugTree])
    executionData = fileTree(dir: project.projectDir, includes: ['**/*.exec', '**/*.ec'])
}

Code from AndroidGradleTemplate