public final class UserHandle
extends Object
implements Parcelable
java.lang.Object | |
↳ | android.os.UserHandle |
Representation of a user on the device.
Inherited constants |
---|
![]() android.os.Parcelable
|
Fields |
|
---|---|
public static final Creator<UserHandle> |
CREATOR
|
Public constructors |
|
---|---|
UserHandle(Parcel in) Instantiate a new UserHandle from the data in a Parcel that was previously written with |
Public methods |
|
---|---|
int |
describeContents() Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean |
equals(Object obj) Indicates whether some other object is "equal to" this one. |
static UserHandle |
getUserHandleForUid(int uid) Returns the user for a given uid. |
int |
hashCode() Returns a hash code value for the object. |
static UserHandle |
readFromParcel(Parcel in) Read a UserHandle from a Parcel that was previously written with |
String |
toString() Returns a string representation of the object. |
static void |
writeToParcel(UserHandle h, Parcel out) Write a UserHandle to a Parcel, handling null pointers. |
void |
writeToParcel(Parcel out, int flags) Flatten this object in to a Parcel. |
Inherited methods |
|
---|---|
![]() java.lang.Object
|
|
![]() android.os.Parcelable
|
UserHandle (Parcel in)
Instantiate a new UserHandle from the data in a Parcel that was previously written with writeToParcel(Parcel, int)
. Note that you must not use this with data written by writeToParcel(UserHandle, Parcel)
since it is not possible to handle a null UserHandle here.
Parameters | |
---|---|
in |
Parcel : The Parcel containing the previously written UserHandle, positioned at the location in the buffer where it was written. |
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(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. |
boolean equals (Object obj)
Indicates whether some other object is "equal to" this one.
The equals
method implements an equivalence relation on non-null object references:
x
, x.equals(x)
should return true
. x
and y
, x.equals(y)
should return true
if and only if y.equals(x)
returns true
. x
, y
, and z
, if x.equals(y)
returns true
and y.equals(z)
returns true
, then x.equals(z)
should return true
. 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. 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 | |
---|---|
obj |
Object : the reference object with which to compare. |
Returns | |
---|---|
boolean |
true if this object is the same as the obj argument; false otherwise. |
UserHandle getUserHandleForUid (int uid)
Returns the user for a given uid.
Parameters | |
---|---|
uid |
int : A uid for an application running in a particular user. |
Returns | |
---|---|
UserHandle |
A UserHandle for that user. |
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:
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. equals(Object)
method, then calling the hashCode
method on each of the two objects must produce the same integer result. 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. |
UserHandle readFromParcel (Parcel in)
Read a UserHandle from a Parcel that was previously written with writeToParcel(UserHandle, Parcel)
, returning either a null or new object as appropriate.
Parameters | |
---|---|
in |
Parcel : The Parcel from which to read the UserHandle |
Returns | |
---|---|
UserHandle |
Returns a new UserHandle matching the previously written object, or null if a null had been written. |
See also:
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. |
void writeToParcel (UserHandle h, Parcel out)
Write a UserHandle to a Parcel, handling null pointers. Must be read with readFromParcel(Parcel)
.
Parameters | |
---|---|
h |
UserHandle : The UserHandle to be written. |
out |
Parcel : The Parcel in which the UserHandle will be placed. |
See also:
void writeToParcel (Parcel out, int flags)
Flatten this object in to a Parcel.
Parameters | |
---|---|
out |
Parcel : The Parcel in which the object should be written. |
flags |
int : Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE . |