What's the best way to fit different styles on one line?

Question

Android

Good day. I often face the task when it is necessary to create a complex string: support for different styles, colors, sizes, etc., all this with support for arguments and in one TextView.

Task example: color the word UNKNOWN in the string UPDATE UNKNOWN TO %1$s in a different color.
I have identified 3 best ways to do this:

//#1
//<string name="update_unknown">UPDATE UNKNOWN TO %1$s</string>
//<string name="selected">UPDATE UNKNOWN TO %1$s</string>

val span = SpannableString(getString(R.string.update_unknown, arg))
val selected = getString(R.string.selected)
val start = span.indexOf(selected)
span.setSpan(
  ForegroundColorSpan(requireContext().getColor(R.color.selectedColor)),
  start,
  start + selected.length,
  Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
)
textView.text = span

//-------------------------------------------------------------------

//#2 Самый короткий, но нельзя вынести цвет в ресурсы.
//<string name="update_unknown_to_s"><![CDATA[UPDATE <font color="#6AE8EF">UNKNOWN</font> TO %1$s]]></string>

val text = getString(R.string.update_unknown_to_s, arg)
textView.text = HtmlCompat.fromHtml(text, HtmlCompat.FROM_HTML_MODE_COMPACT)

//-------------------------------------------------------------------

//#3
//<string name="update">UPDATE UNKNOWN TO %1$s</string>
//<string name="unknown">UNKNOWN</string>
//<string name="to_s">TO %1$s</string>

textView.text = buildSpannedString {
  append("${getString(R.string.update)} ")
  color(getColor(R.color.selectedColor)) {
    append("${getString(R.string.unknown)} ")
  }
  append("${getString(R.string.to_s, arg)} ")
}

Are there better ways and which one would you choose?

String resources are a requirement for localization support.
So far I have settled on the second option.

Answer 1

The spinnedString option is preferable, it is more concise, there are fewer places for errors, but it is verbose, on the other hand, in the code you will not only add string constants, you need coloring from logic, which means verbosity is no longer a problem.
The variant with html, as far as I understand, is more universal, it can be used with a template engine, i.e. when you already have message templates and they need to be brought to the final form, and collecting the final text, marking it with spinnedString, can be inconvenient.
So choose according to your needs.

Answer 2

Well, you have to choose from the second or the first, the third one is not very good at all. Well, the second and first are both normal