Add linked spannable to TextView for Kotlin Android.

TextViewExt.kt

fun TextView.addLinkedSpannable(highlight: String, listener: (view: View) -> Unit) {
    val original = when {
        (text != null && text is SpannableString) -> text
        else -> SpannableString(text)
    }

    val startPos = original.indexOf(highlight)

    movementMethod = LinkMovementMethod.getInstance()
    text = SpannableStringBuilder(original).also {
        it.setSpan(object : ClickableSpan() {
            override fun onClick(view: View) {
                listener(view)
            }

            override fun updateDrawState(ds: TextPaint) {
                super.updateDrawState(ds)
                ds.color = ContextCompat.getColor(context, R.color.black)
            }
        }, startPos, startPos + highlight.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    }
}