BeforeTextChanged.
CharSequence s,
Int start,.
Int count,.
Int after).
info. Within s, the count characters beginning at start are about to be replaced by new text with length ‘after’.
* if addition. Count = 0.
* ‘after’ is length of delta text
Action. Do not change s : error.
onTextChanged
CharSequence s,.
Int start.
Int before.
Int count.
Info. Replacement has commenced.
Within ‘s’, beginning from ‘start’, ‘count’ characters have changed that had length ‘before’
Action. Do not change s : error.
afterTextChanged
Editable s.
Info. Text changed.
Action. Ok to edit.
Updated:
2026 Aug 19
