jacoco.gradle

apply plugin: 'jacoco'

task jacocoReport(type: JacocoReport, dependsOn: 'testDebugUnitTest') {
  reports {
    csv { enabled false } // change if needed
    xml { enabled true } // change if needed
    html {
      enabled true
      destination file("${buildDir}/coverage-report")
    }
  }

  // Setup the .class, source, and execution directories
  final fileFilter = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', 'android/**/*.*']

  // Include this if you use Kotlin
  final kotlinTree = fileTree(dir: "${project.buildDir}/tmp/kotlin-classes/debug", excludes: fileFilter)
  final javacTree = fileTree(dir: "${project.buildDir}/intermediates/javac/debug", excludes: fileFilter)
  final mainSrc = "${project.projectDir}/src/main/java"

  sourceDirectories.setFrom files([mainSrc])
  classDirectories.setFrom files([kotlinTree, javacTree])
  executionData.setFrom fileTree(dir: project.buildDir, includes: [
      'jacoco/testDebugUnitTest.exec', 'outputs/code-coverage/connected/*coverage.ec'
  ])
}