Kotlin Extensions similar to context.getText() but accepting arguments like in String.format(). Full explanation in this post: https://sergiosastre.hashnode.dev/styling-dynamic-strings-directly-in-android-xml

ContextExtension.kt

import android.content.Context
import android.text.SpannedString
import android.text.TextUtils
import androidx.annotation.PluralsRes
import androidx.annotation.StringRes
import androidx.core.text.HtmlCompat

fun Context.getStyledText(
    @StringRes id: Int,
    vararg args: Any
): CharSequence =
    getStyledCharSequence(
        getText(id), 
        args.toList()
    )

fun Context.getStyledQuantityText(
    @PluralsRes id: Int,
    quantity: Int,
    vararg args: Any
): CharSequence =
    getStyledCharSequence(
        resources.getQuantityText(id, quantity), 
        args.toList()
    )

private fun Context.getStyledCharSequence(
    spannedStringFromRes: CharSequence,
    args: List<Any>
): CharSequence {
    val escapedArgs = args.map {
        if (it is String) TextUtils.htmlEncode(it) else it
    }.toTypedArray()

    val spannedString = SpannedString(spannedStringFromRes)
    val htmlString = HtmlCompat.toHtml(
        spannedString,
        HtmlCompat.TO_HTML_PARAGRAPH_LINES_INDIVIDUAL
    )
        .substringBeforeLast('>')
        .plus(">")

    val dynamicStyledString = String.format(htmlString, *escapedArgs)
    val result =
     HtmlCompat.fromHtml(
        dynamicStyledString,
        HtmlCompat.FROM_HTML_MODE_COMPACT
    )

    return result.removeSuffix("\n")
}