UIString: Allows switching between strings and string resources without additional logic in the view. Also avoids accessing Android platform classes outside of the view to resolve strings.

UIString.kt

import android.content.res.Resources
import android.os.Parcelable
import androidx.annotation.StringRes
import kotlinx.parcelize.Parcelize

/**
 * UIString: Allows switching between strings and string resources without additional
 * logic in the view. Also avoids accessing Android platform classes outside of the view
 * to resolve strings.
 */
sealed class UIString : Parcelable {
    @Parcelize
    data class ActualString(val value: String) : UIString()

    @Parcelize
    data class StringResource(@StringRes val id: Int) : UIString()

    /**
     * Only used in your view
     */
    fun getString(resources: Resources) = when (this) {
        is ActualString -> this.value
        is StringResource -> resources.getString(this.id)
    }
}

/**
 * Helper directly from resources
 */
fun Resources.getString(uiString: UIString) = uiString.getString(this)