1. Custom toast có 1 cái TextView.
2. Trong custom toast sử dụng ClickableSpan cho TextView đó.
3. Mỗi lần sử dụng thì truyền content = HTML

fun setHtmlWithLinkClickListener(textView: TextView, html: String, listener: ITextLinkListener, underline: Boolean = true) {
	val sequence = Html.fromHtml(html)
	val strBuilder = SpannableStringBuilder(sequence)
	val urls = strBuilder.getSpans(0, sequence.length, URLSpan::class.java)
	for (span in urls) {
		val start = strBuilder.getSpanStart(span)
		val end = strBuilder.getSpanEnd(span)
		val flags = strBuilder.getSpanFlags(span)
		val clickable = object : ClickableSpan() {
			override fun updateDrawState(ds: TextPaint) {
				ds.isUnderlineText = underline
			}
			override fun onClick(widget: View) {
				listener.onClicked(span.url)
			}
		}
		strBuilder.setSpan(clickable, start, end, flags)
		strBuilder.removeSpan(span)
	}
	textView.text = strBuilder
	textView.movementMethod = LinkMovementMethod.getInstance()
}

interface ITextLinkListener {
	fun onClicked(url: String)
}