public
interface
TextWatcher
implements
NoCopySpan
| android.text.TextWatcher |
 Known Indirect Subclasses
|
When an object of a type is attached to an Editable, its methods will be called when the text is changed.
Public methods | |
|---|---|
abstract
void
|
afterTextChanged(Editable s)
This method is called to notify you that, somewhere within
|
abstract
void
|
beforeTextChanged(CharSequence s, int start, int count, int after)
This method is called to notify you that, within |
abstract
void
|
onTextChanged(CharSequence s, int start, int before, int count)
This method is called to notify you that, within |
void afterTextChanged (Editable s)
This method is called to notify you that, somewhere within
s, the text has been changed.
It is legitimate to make further changes to s from
this callback, but be careful not to get yourself into an infinite
loop, because any changes you make will cause this method to be
called again recursively.
(You are not told where the change took place because other
afterTextChanged() methods may already have made other changes
and invalidated the offsets. But if you need to know here,
you can use setSpan(Object, int, int, int) in onTextChanged(CharSequence, int, int, int)
to mark your place and then look up from here where the span
ended up.
| Parameters | |
|---|---|
s |
Editable
|
void beforeTextChanged (CharSequence s, int start, int count, int after)
This method is called to notify you that, within s,
the count characters beginning at start
are about to be replaced by new text with length after.
It is an error to attempt to make changes to s from
this callback.
| Parameters | |
|---|---|
s |
CharSequence
|
start |
int
|
count |
int
|
after |
int
|
void onTextChanged (CharSequence s, int start, int before, int count)
This method is called to notify you that, within s,
the count characters beginning at start
have just replaced old text that had length before.
It is an error to attempt to make changes to s from
this callback.
| Parameters | |
|---|---|
s |
CharSequence
|
start |
int
|
before |
int
|
count |
int
|
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