Code snippet for the sample of parsing long dynamic text into clickable links, if any available, using Spannable and Matcher with Kotlin in Android

ParseClickableLinksKotlin.kt

private val urlPattern: Pattern = Pattern.compile(
  "(?:^|[\\W])((ht|f)tp(s?):\\/\\/|www\\.)"
  + "(([\\w\\-]+\\.){1,}?([\\w\\-.~]+\\/?)*"
  + "[\\p{Alnum}.,%_=?&#\\-+()\\[\\]\\*$~@!:/{};']*)",
  Pattern.CASE_INSENSITIVE or Pattern.MULTILINE or Pattern.DOTALL
)

private fun clickableLink{
  try {
    val str = SpannableString(longText)
    val matcher = urlPattern.matcher(longText)
    var matchStart: Int
    var matchEnd: Int

    while (matcher.find()){
      matchStart = matcher.start(1)
      matchEnd = matcher.end()

      var url = longText.substring(matchStart, matchEnd)
      if (!url.startsWith("http://") && !url.startsWith("https://"))
        url = "https://$url"

      val clickableSpan: ClickableSpan = object : ClickableSpan() {
        override fun onClick(widget: View) {
          val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
          context?.startActivity(intent)
        }

        override fun updateDrawState(ds: TextPaint) {
          super.updateDrawState(ds)
          ds.isUnderlineText = false
        }
      }
      str.setSpan(clickableSpan, matchStart, matchEnd, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
    }
    mBinding.textViewLongText.text = str
    mBinding.textViewLongText.movementMethod = LinkMovementMethod.getInstance()
  }catch (e: Exception){
    e.printStackTrace()
  }
}

The respective blog which explains the code above is here