CustomLinkMovementMethod

// Listen to hyperlink tapped on text view

class CustomLinkMovementMethod(private val onUrlTapped: (String) -> Unit) : LinkMovementMethod() {

    override fun onTouchEvent(widget: TextView?, buffer: Spannable?, event: MotionEvent?): Boolean {
        event?.let {
            val action = event.action
            if (action != MotionEvent.ACTION_UP)
                return super.onTouchEvent(widget, buffer, event)

            var x = event.x.toInt()
            var y = event.y.toInt()

            widget?.let { v ->
                x -= v.totalPaddingLeft;
                y -= v.totalPaddingTop;
                x += v.scrollX;
                y += v.scrollY;

                val layout = v.layout;
                val line = layout.getLineForOffset(y);
                val off = layout.getOffsetForHorizontal(line, x.toFloat());

                val link = buffer?.getSpans(off, off, URLSpan::class.java)
                link?.let {
                    if (it.isNotEmpty()) {
                        val url = (it[0] as URLSpan).url;
                        if (url.isNotEmpty()) {
                            onUrlTapped.invoke(url)
                        }
                    }
                }

                return true
            }
        }

        return super.onTouchEvent(widget, buffer, event)
    }
}