android.text
public
interface
android.text.Spanned
This is the interface for text that has markup objects attached to
ranges of it. Not all text classes have mutable markup or text;
see Spannable for mutable markup and Editable for
mutable text.
Known Indirect Subclasses
Editable |
This is the interface for text whose content and markup
can be changed (as opposed
to immutable text like Strings). |
Spannable |
This is the interface for text to which markup objects can be
attached and detached. |
SpannableString |
This is the class for text whose content is immutable but to which
markup objects can be attached and detached. |
SpannableStringBuilder |
This is the class for text whose content and markup can both be changed. |
SpannedString |
This is the class for text whose content and markup are immutable. |
Summary
Constants
|
|
|
Value |
|
int |
SPAN_EXCLUSIVE_EXCLUSIVE |
Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand
to include text inserted at either their starting or ending point. |
33 |
0x00000021 |
int |
SPAN_EXCLUSIVE_INCLUSIVE |
Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
to include text inserted at their ending point but not at their
starting point. |
34 |
0x00000022 |
int |
SPAN_INCLUSIVE_EXCLUSIVE |
Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
to include text inserted at their starting point but not at their
ending point. |
17 |
0x00000011 |
int |
SPAN_INCLUSIVE_INCLUSIVE |
Spans of type SPAN_INCLUSIVE_INCLUSIVE expand
to include text inserted at either their starting or ending point. |
18 |
0x00000012 |
int |
SPAN_MARK_MARK |
0-length spans with type SPAN_MARK_MARK behave like text marks:
they remain at their original offset when text is inserted
at that offset. |
17 |
0x00000011 |
int |
SPAN_MARK_POINT |
SPAN_MARK_POINT is a synonym for SPAN_INCLUSIVE_INCLUSIVE. |
18 |
0x00000012 |
int |
SPAN_PARAGRAPH |
SPAN_PARAGRAPH behaves like SPAN_INCLUSIVE_EXCLUSIVE
(SPAN_MARK_MARK), except that if either end of the span is
at the end of the buffer, that end behaves like _POINT
instead (so SPAN_INCLUSIVE_INCLUSIVE if it starts in the
middle and ends at the end, or SPAN_EXCLUSIVE_INCLUSIVE
if it both starts and ends at the end). |
51 |
0x00000033 |
int |
SPAN_POINT_MARK |
SPAN_POINT_MARK is a synonym for SPAN_EXCLUSIVE_EXCLUSIVE. |
33 |
0x00000021 |
int |
SPAN_POINT_POINT |
0-length spans with type SPAN_POINT_POINT behave like cursors:
they are pushed forward by the length of the insertion when text
is inserted at their offset. |
34 |
0x00000022 |
int |
SPAN_PRIORITY |
The bits specified by the SPAN_PRIORITY bitmap determine the order
of change notifications -- higher numbers go first. |
16711680 |
0x00ff0000 |
int |
SPAN_PRIORITY_SHIFT |
The bits numbered just above SPAN_PRIORITY_SHIFT determine the order
of change notifications -- higher numbers go first. |
16 |
0x00000010 |
int |
SPAN_USER |
The bits specified by the SPAN_USER bitfield are available
for callers to use to store scalar data associated with their
span object. |
-16777216 |
0xff000000 |
int |
SPAN_USER_SHIFT |
The bits numbered SPAN_USER_SHIFT and above are available
for callers to use to store scalar data associated with their
span object. |
24 |
0x00000018 |
Public Methods
Details
Constants
public
static
final
int
SPAN_EXCLUSIVE_EXCLUSIVE
Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand
to include text inserted at either their starting or ending point.
They can never have a length of 0 and are automatically removed
from the buffer if all the text they cover is removed.
Constant Value:
33
(0x00000021)
public
static
final
int
SPAN_EXCLUSIVE_INCLUSIVE
Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
to include text inserted at their ending point but not at their
starting point. When 0-length, they behave like points.
Constant Value:
34
(0x00000022)
public
static
final
int
SPAN_INCLUSIVE_EXCLUSIVE
Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand
to include text inserted at their starting point but not at their
ending point. When 0-length, they behave like marks.
Constant Value:
17
(0x00000011)
public
static
final
int
SPAN_INCLUSIVE_INCLUSIVE
Spans of type SPAN_INCLUSIVE_INCLUSIVE expand
to include text inserted at either their starting or ending point.
Constant Value:
18
(0x00000012)
public
static
final
int
SPAN_MARK_MARK
0-length spans with type SPAN_MARK_MARK behave like text marks:
they remain at their original offset when text is inserted
at that offset.
Constant Value:
17
(0x00000011)
public
static
final
int
SPAN_MARK_POINT
public
static
final
int
SPAN_PARAGRAPH
SPAN_PARAGRAPH behaves like SPAN_INCLUSIVE_EXCLUSIVE
(SPAN_MARK_MARK), except that if either end of the span is
at the end of the buffer, that end behaves like _POINT
instead (so SPAN_INCLUSIVE_INCLUSIVE if it starts in the
middle and ends at the end, or SPAN_EXCLUSIVE_INCLUSIVE
if it both starts and ends at the end).
Its endpoints must be the start or end of the buffer or
immediately after a \n character, and if the \n
that anchors it is deleted, the endpoint is pulled to the
next \n that follows in the buffer (or to the end of
the buffer).
Constant Value:
51
(0x00000033)
public
static
final
int
SPAN_POINT_MARK
public
static
final
int
SPAN_POINT_POINT
0-length spans with type SPAN_POINT_POINT behave like cursors:
they are pushed forward by the length of the insertion when text
is inserted at their offset.
Constant Value:
34
(0x00000022)
public
static
final
int
SPAN_PRIORITY
The bits specified by the SPAN_PRIORITY bitmap determine the order
of change notifications -- higher numbers go first. You probably
don't need to set this; it is used so that when text changes, the
text layout gets the chance to update itself before any other
callbacks can inquire about the layout of the text.
Constant Value:
16711680
(0x00ff0000)
public
static
final
int
SPAN_PRIORITY_SHIFT
The bits numbered just above SPAN_PRIORITY_SHIFT determine the order
of change notifications -- higher numbers go first. You probably
don't need to set this; it is used so that when text changes, the
text layout gets the chance to update itself before any other
callbacks can inquire about the layout of the text.
Constant Value:
16
(0x00000010)
public
static
final
int
SPAN_USER
The bits specified by the SPAN_USER bitfield are available
for callers to use to store scalar data associated with their
span object.
Constant Value:
-16777216
(0xff000000)
public
static
final
int
SPAN_USER_SHIFT
The bits numbered SPAN_USER_SHIFT and above are available
for callers to use to store scalar data associated with their
span object.
Constant Value:
24
(0x00000018)
Public Methods
public
int
getSpanEnd(Object tag)
Return the end of the range of text to which the specified
markup object is attached, or -1 if the object is not attached.
public
int
getSpanFlags(Object tag)
Return the flags that were specified when
setSpan(Object, int, int, int) was
used to attach the specified markup object, or 0 if the specified
object has not been attached.
public
int
getSpanStart(Object tag)
Return the beginning of the range of text to which the specified
markup object is attached, or -1 if the object is not attached.
public
T[]
getSpans(int start, int end, Class<T> type)
Return an array of the markup objects attached to the specified
slice of this CharSequence and whose type is the specified type
or a subclass of it. Specify Object.class for the type if you
want all the objects regardless of type.
public
int
nextSpanTransition(int start, int limit, Class type)
Return the first offset greater than or equal to start
where a markup object of class type
begins or ends,
or limit
if there are no starts or ends greater than or
equal to start
but less than limit
. Specify
null
or Object.class for the type if you want every
transition regardless of type.