How do I tell if my textview has been ellipsized?

Question

I have a multi-line TextView that has android:ellipsize=\"end\" set. I would like to know, however, if the string I place in there is actually too

Answer 1

lateinit var toggleMoreButton: Runnable
toggleMoreButton = Runnable {
  if(reviewTextView.layout == null) { // wait while layout become available
       reviewTextView.post(toggleMoreButton) 
       return@Runnable
  }
  readMoreButton.visibility = if(reviewTextView.layout.text.toString() != comment) View.VISIBLE else View.GONE
}
reviewTextView.post(toggleMoreButton)

It is some typical case:

1. comment in 'reviewTextView'
2. comment can collapsed by some criteria
3. if comment collapsed you show button 'readMoreButton'