Color hex kotlin function

act.kt

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == AUTOCOMPLETE_REQUEST_CODE) {
            when (resultCode) {
                Activity.RESULT_OK -> {
                    val place = data?.let { Autocomplete.getPlaceFromIntent(it) }
                    Log.e("PlaceResult", "${place?.toString()}")
                }
                Activity.RESULT_CANCELED -> {
                    Log.e("PlaceCanceled", "No Place selected")
                }
                AutocompleteActivity.RESULT_ERROR -> {
                    val statusPlace = data?.let { Autocomplete.getStatusFromIntent(it) }
                    Log.e("AutocompleateError", "${statusPlace?.statusMessage}")
                }
            }
        }
    }

colorhex.kt

fun getColorIntWithAlpha(hexColor: String, alpha: Float): Int =
        Color.parseColor(hexColor.alphaColor(alpha))

    fun String.alphaColor(percentage: Float = 0f): String = if (percentage < 0 || percentage > 1) {
        fail("The percentage need to be a float number between 0.0 and 1.0")
    } else {
        val alphInt = ((percentage * 255) + 0.000001).roundToInt()
        val alphaHex = String.format("%02X", alphInt)
        this.replace("#", "#$alphaHex")
    }

    fun fail(message: String): Nothing {
        throw IllegalArgumentException(message)
    }