Accessing Dynamically To A Kotlin Class Property

I want to set dynamically a backgroundColor to a text view in a RecyleView, and thus not all my item will have the same background color for their tag. This is the pseudo code I'd

Solution 1:

It's not a good idea to access the resources in a dynamic way, you will lose compile-time safety and code completion. In your case, you could create a Map that associates every view type to the resource you want (i.e. color).

Example

/* colors.xml */
<color name="color_view_1">#AA000000</color>
<colorname="color_view_2">#AB000000</color><colorname="color_view_3">#AC000000</color><colorname="color_view_4">#AD000000</color><colorname="color_view_default">#AE000000</color>/* Adapter */enumclassViewType {
    TYPE1, TYPE2, TYPE3
}

val colors = mapOf(
    ViewType.TYPE1 to R.color.color_view_1,
    ViewType.TYPE2 to R.color.color_view_2,
    ViewType.TYPE3 to R.color.color_view_3
)

/* onBindViewHolder */
val color = colors[viewType] ?: R.color.color_view_default

Solution 2:

You should set "color" and not "id" for getIdentifier()'s 2nd argument:

val id = holder.context.resources.getIdentifier(lowerType, "color", holder.context.packageName)