Meanwhile in Application class

MyApplication.kt

fun registerReceiver() {
  val filter = IntentFilter()
  filter.addAction("build-rx-report") // Action from report.sh

  val receiver = object : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
      val result = RxDisposableWatcher.probe()
      val report = HtmlReportBuilder(result).build()
      val file = File(getExternalFilesDir(null), "report.html")
      val stream = FileOutputStream(file)
      stream.use {
        it.write(report.toByteArray())
      }
      Log.d(TAG, "Report saved to: ${file.path}")
    }
  }
  registerReceiver(receiver, filter)
}