What is a difference between Spannable and String ?

The main difference between Spannable and String in Android is that Spannable allows you to apply formatting spans to specific portions of the text, while String is a plain, immutable sequence of characters without any formatting[1][2].

Some key points:

• String is immutable and cannot be changed once created, while Spannable allows you to add, remove or modify formatting spans after creation[1][3].
• Spannable is a subinterface of Spanned, which represents a CharSequence with attached formatting spans[1][3].
• SpannableString is a concrete implementation of Spannable that stores the text and spans in memory[1][3].
• When you call setText() on a TextView with a Spannable, it creates a copy of the Spannable as a SpannedString which has immutable text and spans[2].
• To update the text o...