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SpannedString

public final class SpannedString
extends Object implements CharSequence, GetChars, Spanned

java.lang.Object
   ↳ android.text.SpannedString


This is the class for text whose content and markup are immutable. For mutable markup, see SpannableString; for mutable text, see SpannableStringBuilder.

Summary

Inherited constants

From interface android.text.Spanned

Public constructors

SpannedString(CharSequence source)

Public methods

final char charAt(int i)

Returns the char value at the specified index.

boolean equals(Object o)

Indicates whether some other object is "equal to" this one.

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.

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.

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.

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.

<T> 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.

int hashCode()

Returns a hash code value for the object.

final int length()

Returns the length of this character sequence.

int nextSpanTransition(int start, int limit, Class kind)

Return the first offset greater than start where a markup object of class type begins or ends, or limit if there are no starts or ends greater than start but less than limit.

CharSequence subSequence(int start, int end)

Returns a new CharSequence that is a subsequence of this sequence.

final String toString()

Returns a string representation of the object.

static SpannedString valueOf(CharSequence source)

Inherited methods

From class java.lang.Object
From interface java.lang.CharSequence
From interface android.text.GetChars
From interface android.text.Spanned

Public constructors

SpannedString

Added in API level 1
SpannedString (CharSequence source)

Parameters
source CharSequence

Public methods

charAt

Added in API level 1
char charAt (int i)

Returns the char value at the specified index. An index ranges from zero to length() - 1. The first char value of the sequence is at index zero, the next at index one, and so on, as for array indexing.

If the char value specified by the index is a surrogate, the surrogate value is returned.

Parameters
i int: the index of the char value to be returned
Returns
char the specified char value

equals

Added in API level 1
boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
o Object: the reference object with which to compare.
Returns
boolean true if this object is the same as the obj argument; false otherwise.

getChars

Added in API level 1
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.

Parameters
start int
end int
dest char
off int

getSpanEnd

Added in API level 1
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.

Parameters
what Object
Returns
int

getSpanFlags

Added in API level 1
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.

Parameters
what Object
Returns
int

getSpanStart

Added in API level 1
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.

Parameters
what Object
Returns
int

getSpans

Added in API level 1
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.

Parameters
queryStart int
queryEnd int
kind Class
Returns
T[]

hashCode

Added in API level 1
int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

Returns
int a hash code value for this object.

length

Added in API level 1
int length ()

Returns the length of this character sequence. The length is the number of 16-bit chars in the sequence.

Returns
int the number of chars in this sequence

nextSpanTransition

Added in API level 1
int nextSpanTransition (int start, 
                int limit, 
                Class kind)

Return the first offset greater than start where a markup object of class type begins or ends, or limit if there are no starts or ends greater than start but less than limit. Specify null or Object.class for the type if you want every transition regardless of type.

Parameters
start int
limit int
kind Class
Returns
int

subSequence

Added in API level 1
CharSequence subSequence (int start, 
                int end)

Returns a new CharSequence that is a subsequence of this sequence. The subsequence starts with the char value at the specified index and ends with the char value at index end - 1. The length (in chars) of the returned sequence is end - start, so if start == end then an empty sequence is returned.

Parameters
start int: the start index, inclusive
end int: the end index, exclusive
Returns
CharSequence the specified subsequence

toString

Added in API level 1
String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Returns
String a string representation of the object.

valueOf

Added in API level 1
SpannedString valueOf (CharSequence source)

Parameters
source CharSequence
Returns
SpannedString
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