Prints all classes in an android/kotlin/java project.

collect-classes.gradle

tasks.register("collectClasses") {
    subprojects {
        dependsOn tasks.withType(JavaCompile)
        dependsOn tasks.withType(KotlinJvmCompile)
    }
    doLast {
        subprojects {
            (tasks.withType(JavaCompile) + tasks.withType(KotlinJvmCompile)).forEach { compile ->
                compile.destinationDirectory
                        .getAsFileTree()
                        ?.matching { include("**/*.class") }
                        ?.files
                        ?.forEach {
                            println(it)
                        }
            }
        }
    }
}