jacoco-report.gradle

// createDebugCoverageReport is not available when android.buildTypes.debug.testCoverageEnabled is false
task jacocoTestReport(type: JacocoReport){
  // Removing dependents, to run the tests and get the report use the command below
    // ./gradlew testDebugUnitTest connectedDebugAndroidTest jacocoTestReport --stacktrace
//}, dependsOn: ['testDebugUnitTest', 'connectedDebugAndroidTest']) {
    //, 'createDebugCoverageReport']) {

    reports {
        xml.required.set(true)
        html.required.set(true)
        xml.outputLocation = layout.buildDirectory.file("reports/jacoco/jacocoRootReport/merged.xml")
        html.outputLocation = layout.buildDirectory.dir("reports/jacoco/jacocoRootReport/html")
    }

    def fileFilter = [
            "**/R.class",
            "**/R\$*.class",
            "**/BuildConfig.*",
            "**/Manifest*.*",
            "**/*Test*.*",
            "android/**/*.*",
            "io/realm/*.*",
            "**/org/mockito/**",
            "**/mockito-extensions/**"]
    def debugTree = fileTree(dir: layout.buildDirectory.file("intermediates/javac/debug/compileDebugJavaWithJavac/classes/"), excludes: fileFilter)
    def mainSrc = "${project.projectDir}/src/main/java"

    sourceDirectories.setFrom([mainSrc])
    classDirectories.setFrom(files([debugTree]))
    executionData.setFrom(fileTree(dir: layout.buildDirectory, includes:
            [
                    "outputs/unit_test_code_coverage/debugUnitTest/testDebugUnitTest.exec",
                    "outputs/code_coverage/debugAndroidTest/connected/**/coverage.ec",
            ]))
}