Class Overview
This is the class for text whose content is immutable but to which
markup objects can be attached and detached.
For mutable text, see SpannableStringBuilder.
Summary
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[Expand]
Inherited Constants |
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 From interface
android.text.Spanned
| int |
SPAN_COMPOSING |
This flag is set on spans that are being used to apply temporary
styling information on the composing text of an input method, so that
they can be found and removed when the composing text is being
replaced. |
| int |
SPAN_EXCLUSIVE_EXCLUSIVE |
Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand
to include text inserted at either their starting or ending point. |
| int |
SPAN_EXCLUSIVE_INCLUSIVE |
Non-0-length spans of type SPAN_EXCLUSIVE_INCLUSIVE expand
to include text inserted at their ending point but not at their
starting point. |
| 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. |
| int |
SPAN_INCLUSIVE_INCLUSIVE |
Spans of type SPAN_INCLUSIVE_INCLUSIVE expand
to include text inserted at either their starting or ending point. |
| int |
SPAN_INTERMEDIATE |
This flag will be set for intermediate span changes, meaning there
is guaranteed to be another change following it. |
| 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. |
| int |
SPAN_MARK_POINT |
SPAN_MARK_POINT is a synonym for SPAN_INCLUSIVE_INCLUSIVE. |
| 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). |
| int |
SPAN_POINT_MARK |
SPAN_POINT_MARK is a synonym for SPAN_EXCLUSIVE_EXCLUSIVE. |
| int |
SPAN_POINT_MARK_MASK |
Bitmask of bits that are relevent for controlling point/mark behavior
of spans. |
| 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. |
| int |
SPAN_PRIORITY |
The bits specified by the SPAN_PRIORITY bitmap determine the order
of change notifications -- higher numbers go first. |
| int |
SPAN_PRIORITY_SHIFT |
The bits numbered just above SPAN_PRIORITY_SHIFT determine the order
of change notifications -- higher numbers go first. |
| 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. |
| 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. |
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| Public Methods |
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final
char
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charAt(int i)
Returns the character at the specified index, with the first character
having index zero.
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boolean
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equals(Object o)
Compares this instance with the specified object and indicates if they
are equal.
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final
void
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getChars(int start, int end, char[] dest, int off)
Exactly like String.getChars(): copy chars start
through end - 1 from this CharSequence into dest
beginning at offset destoff.
|
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int
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getSpanEnd(Object what)
Return the end of the range of text to which the specified
markup object is attached, or -1 if the object is not attached.
|
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int
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getSpanFlags(Object what)
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. |
|
int
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getSpanStart(Object what)
Return the beginning of the range of text to which the specified
markup object is attached, or -1 if the object is not attached.
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<T>
T[]
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getSpans(int queryStart, int queryEnd, Class<T> kind)
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.
|
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int
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hashCode()
Returns an integer hash code for this object.
|
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final
int
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length()
Returns the number of characters in this sequence.
|
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int
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nextSpanTransition(int start, int limit, Class kind)
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.
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void
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removeSpan(Object what)
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void
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setSpan(Object what, int start, int end, int flags)
|
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final
CharSequence
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subSequence(int start, int end)
Returns a CharSequence from the start index (inclusive)
to the end index (exclusive) of this sequence.
|
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final
String
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toString()
Returns a string containing a concise, human-readable description of this
object.
|
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static
SpannableString
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valueOf(CharSequence source)
|
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[Expand]
Inherited Methods |
|---|
From class
java.lang.Object
|
Object
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clone()
Creates and returns a copy of this Object.
|
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boolean
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equals(Object o)
Compares this instance with the specified object and indicates if they
are equal.
|
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void
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finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
|
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final
Class<?>
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getClass()
Returns the unique instance of Class that represents this
object's class. |
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
|
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
|
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
|
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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final
void
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wait(long millis, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long millis)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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From interface
android.text.GetChars
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abstract
void
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getChars(int start, int end, char[] dest, int destoff)
Exactly like String.getChars(): copy chars start
through end - 1 from this CharSequence into dest
beginning at offset destoff.
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From interface
android.text.Spannable
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abstract
void
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removeSpan(Object what)
Remove the specified object from the range of text to which it
was attached, if any.
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abstract
void
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setSpan(Object what, int start, int end, int flags)
Attach the specified markup object to the range start…end
of the text, or move the object to that range if it was already
attached elsewhere.
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From interface
android.text.Spanned
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abstract
int
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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.
|
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abstract
int
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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. |
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abstract
int
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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.
|
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abstract
<T>
T[]
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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.
|
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abstract
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.
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From interface
java.lang.CharSequence
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abstract
char
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charAt(int index)
Returns the character at the specified index, with the first character
having index zero.
|
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abstract
int
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length()
Returns the number of characters in this sequence.
|
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abstract
CharSequence
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subSequence(int start, int end)
Returns a CharSequence from the start index (inclusive)
to the end index (exclusive) of this sequence.
|
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abstract
String
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toString()
Returns a string with the same characters in the same order as in this
sequence.
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Public Constructors
Public Methods
public
final
char
charAt
(int i)
Returns the character at the specified index, with the first character
having index zero.
Parameters
| i
| the index of the character to return. |
public
boolean
equals
(Object o)
Compares this instance with the specified object and indicates if they
are equal. In order to be equal, o must represent the same object
as this instance using a class-specific comparison. The general contract
is that this comparison should be reflexive, symmetric, and transitive.
Also, no object reference other than null is equal to null.
The default implementation returns true only if this ==
o. See Writing a correct
equals method
if you intend implementing your own equals method.
The general contract for the equals and hashCode() methods is that if equals returns true for
any two objects, then hashCode() must return the same value for
these objects. This means that subclasses of Object usually
override either both methods or neither of them.
Parameters
| o
| the object to compare this instance with. |
Returns
true if the specified object is equal to this Object; false otherwise.
public
final
void
getChars
(int start, int end, char[] dest, int off)
Exactly like String.getChars(): copy chars start
through end - 1 from this CharSequence into dest
beginning at offset destoff.
public
int
getSpanEnd
(Object what)
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 what)
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 what)
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 queryStart, int queryEnd, Class<T> kind)
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
hashCode
()
Returns an integer hash code for this object. By contract, any two
objects for which equals(Object) returns true must return
the same hash code value. This means that subclasses of Object
usually override both methods or neither method.
Note that hash values must not change over time unless information used in equals
comparisons also changes.
See Writing a correct
hashCode method
if you intend implementing your own hashCode method.
public
final
int
length
()
Returns the number of characters in this sequence.
Returns
- the number of characters.
public
int
nextSpanTransition
(int start, int limit, Class kind)
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.
public
void
removeSpan
(Object what)
public
void
setSpan
(Object what, int start, int end, int flags)
public
final
CharSequence
subSequence
(int start, int end)
Returns a CharSequence from the start index (inclusive)
to the end index (exclusive) of this sequence.
Parameters
| start
| the start offset of the sub-sequence. It is inclusive, that
is, the index of the first character that is included in the
sub-sequence. |
| end
| the end offset of the sub-sequence. It is exclusive, that is,
the index of the first character after those that are included
in the sub-sequence |
Returns
- the requested sub-sequence.
public
final
String
toString
()
Returns a string containing a concise, human-readable description of this
object. Subclasses are encouraged to override this method and provide an
implementation that takes into account the object's type and data. The
default implementation is equivalent to the following expression:
getClass().getName() + '@' + Integer.toHexString(hashCode())
See Writing a useful
toString method
if you intend implementing your own toString method.
Returns
- a printable representation of this object.
