How to get the number of cores of an android device

Question

I was looking to determine(or count) the number of cores in the embedded processor of android device.

I tried using /proc/cpuinfo, but it is not return

Answer 1

Nice and simple solution in kotlin:

fun getCPUCoreNum(): Int {
  val pattern = Pattern.compile("cpu[0-9]+")
  return Math.max(
    File("/sys/devices/system/cpu/")
      .walk()
      .maxDepth(1)
      .count { pattern.matcher(it.name).matches() },
    Runtime.getRuntime().availableProcessors()
  )
}