IAP결제 시 onProductPurchased가 첫번째 시도에 호출되지 않을 때

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    if (!bp.handleActivityResult(requestCode, resultCode, data))
        super.onActivityResult(requestCode, resultCode, data)
}

참고: https://sunpil.tistory.com/m/188?category=771900