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added in API level 1

AlteredCharSequence

public class AlteredCharSequence
extends Object implements CharSequence, GetChars

java.lang.Object
   ↳ android.text.AlteredCharSequence


An AlteredCharSequence is a CharSequence that is largely mirrored from another CharSequence, except that a specified range of characters are mirrored from a different char array instead.

Summary

Public methods

char charAt(int off)

Returns the char value at the specified index.

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 length()

Returns the length of this character sequence.

static AlteredCharSequence make(CharSequence source, char[] sub, int substart, int subend)

Create an AlteredCharSequence whose text (and possibly spans) are mirrored from source, except that the range of offsets substart inclusive to subend exclusive are mirrored instead from sub, beginning at offset 0.

CharSequence subSequence(int start, int end)

Returns a CharSequence that is a subsequence of this sequence.

String toString()

Returns a string representation of the object.

Inherited methods

Public methods

charAt

added in API level 1
public char charAt (int off)

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
off int: the index of the char value to be returned

Returns
char the specified char value

getChars

added in API level 1
public 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

length

added in API level 1
public 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

make

added in API level 1
public static AlteredCharSequence make (CharSequence source, 
                char[] sub, 
                int substart, 
                int subend)

Create an AlteredCharSequence whose text (and possibly spans) are mirrored from source, except that the range of offsets substart inclusive to subend exclusive are mirrored instead from sub, beginning at offset 0.

Parameters
source CharSequence

sub char

substart int

subend int

Returns
AlteredCharSequence

subSequence

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

Returns a 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
public 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.