LocaleList
public
final
class
LocaleList
extends Object
implements
Parcelable
java.lang.Object | |
↳ | android.os.LocaleList |
LocaleList is an immutable list of Locales, typically used to keep an ordered list of user preferences for locales.
Summary
Inherited constants |
---|
Fields | |
---|---|
public
static
final
Creator<LocaleList> |
CREATOR
|
Public constructors | |
---|---|
LocaleList(Locale... list)
Creates a new |
Public methods | |
---|---|
int
|
describeContents()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean
|
equals(Object other)
Indicates whether some other object is "equal to" this one. |
static
LocaleList
|
forLanguageTags(String list)
Generates a new LocaleList with the given language tags. |
Locale
|
get(int index)
Retrieves the |
static
LocaleList
|
getAdjustedDefault()
Returns the default locale list, adjusted by moving the default locale to its first position. |
static
LocaleList
|
getDefault()
The result is guaranteed to include the default Locale returned by Locale.getDefault(), but not necessarily at the top of the list. |
static
LocaleList
|
getEmptyLocaleList()
Retrieve an empty instance of |
Locale
|
getFirstMatch(String[] supportedLocales)
Returns the first match in the locale list given an unordered array of supported locales in BCP 47 format. |
int
|
hashCode()
Returns a hash code value for the object. |
int
|
indexOf(Locale locale)
Searches this |
boolean
|
isEmpty()
Returns whether the |
static
boolean
|
isPseudoLocale(ULocale locale)
Returns true if locale is a pseudo-locale, false otherwise. |
static
boolean
|
matchesLanguageAndScript(Locale supported, Locale desired)
Determine whether two locales are considered a match, even if they are not exactly equal. |
static
void
|
setDefault(LocaleList locales)
Also sets the default locale by calling Locale.setDefault() with the first locale in the list. |
int
|
size()
Returns the number of |
String
|
toLanguageTags()
Retrieves a String representation of the language tags in this list. |
String
|
toString()
Returns a string representation of the object. |
void
|
writeToParcel(Parcel dest, int parcelableFlags)
Flatten this object in to a Parcel. |
Inherited methods | |
---|---|
Fields
Public constructors
LocaleList
public LocaleList (Locale... list)
Creates a new LocaleList
.
If two or more same locales are passed, the repeated locales will be dropped.
For empty lists of Locale
items it is better to use getEmptyLocaleList()
,
which returns a pre-constructed empty list.
Parameters | |
---|---|
list |
Locale : This value cannot be null . |
Throws | |
---|---|
NullPointerException |
if any of the input locales is null . |
Public methods
describeContents
public int describeContents ()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation. For example, if the object will
include a file descriptor in the output of writeToParcel(android.os.Parcel, int)
,
the return value of this method must include the
CONTENTS_FILE_DESCRIPTOR
bit.
Returns | |
---|---|
int |
a bitmask indicating the set of special object types marshaled
by this Parcelable object instance.
Value is either 0 or CONTENTS_FILE_DESCRIPTOR |
equals
public boolean equals (Object other)
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 returntrue
. - It is symmetric: for any non-null reference values
x
andy
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any non-null reference values
x
,y
, andz
, ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
. - It is consistent: for any non-null reference values
x
andy
, multiple invocations ofx.equals(y)
consistently returntrue
or consistently returnfalse
, provided no information used inequals
comparisons on the objects is modified. - For any non-null reference value
x
,x.equals(null)
should returnfalse
.
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
Parameters | |
---|---|
other |
Object : This value may be null . |
Returns | |
---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
forLanguageTags
public static LocaleList forLanguageTags (String list)
Generates a new LocaleList with the given language tags.
Parameters | |
---|---|
list |
String : The language tags to be included as a single String separated by commas.
This value may be null . |
Returns | |
---|---|
LocaleList |
A new instance with the Locale items identified by the given tags.
This value cannot be null . |
get
public Locale get (int index)
Retrieves the Locale
at the specified index.
Parameters | |
---|---|
index |
int : The position to retrieve. |
Returns | |
---|---|
Locale |
The Locale in the given index. |
getAdjustedDefault
public static LocaleList getAdjustedDefault ()
Returns the default locale list, adjusted by moving the default locale to its first position.
Returns | |
---|---|
LocaleList |
This value cannot be null . |
getDefault
public static LocaleList getDefault ()
The result is guaranteed to include the default Locale returned by Locale.getDefault(), but not necessarily at the top of the list. The default locale not being at the top of the list is an indication that the system has set the default locale to one of the user's other preferred locales, having concluded that the primary preference is not supported but a secondary preference is.
Note that the default LocaleList would change if Locale.setDefault() is called. This method takes that into account by always checking the output of Locale.getDefault() and recalculating the default LocaleList if needed.
Returns | |
---|---|
LocaleList |
This value cannot be null . |
getEmptyLocaleList
public static LocaleList getEmptyLocaleList ()
Retrieve an empty instance of LocaleList
.
Returns | |
---|---|
LocaleList |
This value cannot be null . |
getFirstMatch
public Locale getFirstMatch (String[] supportedLocales)
Returns the first match in the locale list given an unordered array of supported locales in BCP 47 format.
Parameters | |
---|---|
supportedLocales |
String |
Returns | |
---|---|
Locale |
The first Locale from this list that appears in the given array, or
null if the LocaleList is empty. |
hashCode
public 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 inequals
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
method, then calling thehashCode
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
method, then calling thehashCode
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.
Returns | |
---|---|
int |
a hash code value for this object. |
indexOf
public int indexOf (Locale locale)
Searches this LocaleList
for the specified Locale
and returns the index of
the first occurrence.
Parameters | |
---|---|
locale |
Locale : The Locale to search for. |
Returns | |
---|---|
int |
The index of the first occurrence of the Locale or -1 if the item
wasn't found.
Value is -1 or greater |
isEmpty
public boolean isEmpty ()
Returns whether the LocaleList
contains no Locale
items.
Returns | |
---|---|
boolean |
true if this LocaleList has no Locale items, false
otherwise. |
isPseudoLocale
public static boolean isPseudoLocale (ULocale locale)
Returns true if locale is a pseudo-locale, false otherwise.
Parameters | |
---|---|
locale |
ULocale : This value may be null . |
Returns | |
---|---|
boolean |
matchesLanguageAndScript
public static boolean matchesLanguageAndScript (Locale supported, Locale desired)
Determine whether two locales are considered a match, even if they are not exactly equal. They are considered as a match when both of their languages and scripts (explicit or inferred) are identical. This means that a user would be able to understand the content written in the supported locale even if they say they prefer the desired locale. E.g. [zh-HK] matches [zh-Hant]; [en-US] matches [en-CA]
Parameters | |
---|---|
supported |
Locale : The supported Locale to be compared.
This value cannot be null . |
desired |
Locale : The desired Locale to be compared.
This value cannot be null . |
Returns | |
---|---|
boolean |
True if they match, false otherwise. |
setDefault
public static void setDefault (LocaleList locales)
Also sets the default locale by calling Locale.setDefault() with the first locale in the list.
Parameters | |
---|---|
locales |
LocaleList : This value cannot be null . |
Throws | |
---|---|
NullPointerException |
if the input is null . |
IllegalArgumentException |
if the input is empty. |
size
public int size ()
Returns the number of Locale
items in this LocaleList
.
Returns | |
---|---|
int |
Value is 0 or greater |
toLanguageTags
public String toLanguageTags ()
Retrieves a String representation of the language tags in this list.
Returns | |
---|---|
String |
This value cannot be null . |
toString
public String toString ()
Returns a string representation of the object.
Returns | |
---|---|
String |
a string representation of the object. |
writeToParcel
public void writeToParcel (Parcel dest, int parcelableFlags)
Flatten this object in to a Parcel.
Parameters | |
---|---|
dest |
Parcel : The Parcel in which the object should be written.
This value cannot be null . |
parcelableFlags |
int : Additional flags about how the object should be written.
May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE .
Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE , and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES |