Gradle productFlavors for Java+Kotline Coexistence

gistfile1.txt

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

android {
  compileSdkVersion 24
  buildToolsVersion "25.0.2"
  
  // other settings not shown
  
  flavorDimensions "lang"
  
  // Four build variants:  jvDebug, jvRelease, ktDebug, ktRelease
  productFlavors {
    // Place both flavors under the same 'dimension'
    kt.dimension "lang"
    jv.dimension "lang"
  }
  
  sourceSets {
    kt.java.srcDirs += 'src/kt'
    jv.java.srcDirs += 'src/jv'
  }
}