# 2021/12/10

https://medium.com/nerd-for-tech/useful-kotlin-extensions-for-android-d8652f64bca8

유용한 확장함수

fun Context.getCompatColor(@ColorRes colorId: Int) = ResourcesCompat.getColor(resources, colorId, null)

fun Context.getCompatDrawable(@DrawableRes drawableId: Int) = AppCompatResources.getDrawable(this, drawableId)!

<-------------------------------------------------------------->

// Activity
getCompatColor(R.color.white)

// Fragment
requireContext().getCompatColor(R.color.white)

퍼미션 관련

// Traditional way (Activity)
(ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
   != PackageManager.PERMISSION_GRANTED) && (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
   != PackageManager.PERMISSION_GRANTED)

// Extension (Activity)
hasPermissions(Manifest.permission.CAMERA, Manifest.permission.ACCESS_FINE_LOCATION)

Date

val isoFormatter = SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS")

fun Date.toISOFormat() : String = isoFormatter.format(this)

<-------------------------------------------------------------->

Date(1620862687852).toISOFormat() // 2021-05-12 23:38:07.540
view raw

PriceFormat

val priceFormatter = DecimalFormat("###,###,###.00")

fun Double.formatPrice(): String = priceFormatter.format(this)

<-------------------------------------------------------------->

fun Context.formatPrice(price: Double) : String {
    val formatter = DecimalFormat(getString(R.string.price_formatter))
    return formatter.format(price)
}