What is the role of SpannableString in Android?

In Android development, SpannableString is a type of mutable string that can be used to implement rich text effects. With SpannableString, we can format different parts of the text, such as changing text color, size, style, adding underline, adding hyperlinks, etc. SpannableString can be displayed in TextView, EditText, and other controls, providing users with a more visually appealing text display. The purpose of SpannableString is to allow applications to more flexibly control the display effects of text, enhancing the user experience.