How to change color of a TextView line by line?

Question

I have text that goes like that:

• loading item 1
• loading item 2
• loading item 3

I want to change color (or fontWeight) of every line to show user the progress.

Answer 1

You can use SpannableString for this

val currentText = textView.text
val spannable = SpannableString(currentText)
spannable.setSpan(ForegroundColorSpan(Color.RED), 0, endOfFirstLine, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
spannable.setSpan(ForegroundColorSpan(Color.GREEN), endOfFirstLine, endOfSecondLine, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
spannable.setSpan(ForegroundColorSpan(Color.YELLOW), endOfSecondLine, endOfThirdLine, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

// Set the colored text
textView.text = spannable