UserHandle


public final class UserHandle
extends Object implements Parcelable

java.lang.Object
   ↳ android.os.UserHandle


Representation of a user on the device.

Summary

Inherited constants

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 writeToParcel(android.os.Parcel, int).

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 writeToParcel(android.os.UserHandle, android.os.Parcel), returning either a null or new object as appropriate.

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

Fields

CREATOR

Added in API level 17
public static final Creator<UserHandle> CREATOR

Public constructors

UserHandle

Added in API level 17
public UserHandle (Parcel in)

Instantiate a new UserHandle from the data in a Parcel that was previously written with writeToParcel(android.os.Parcel, int). Note that you must not use this with data written by writeToParcel(android.os.UserHandle, android.os.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.

Public methods

describeContents

Added in API level 17
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

Added in API level 17
public 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:

  • 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.

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
obj Object: This value may be null.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

getUserHandleForUid

Added in API level 24
public static 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.

hashCode

Added in API level 17
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 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 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 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.

Returns
int a hash code value for this object.

readFromParcel

Added in API level 17
public static UserHandle readFromParcel (Parcel in)

Read a UserHandle from a Parcel that was previously written with writeToParcel(android.os.UserHandle, android.os.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.

toString

Added in API level 17
public String toString ()

Returns a string representation of the object.

Returns
String a string representation of the object.

writeToParcel

Added in API level 17
public static void writeToParcel (UserHandle h, 
                Parcel out)

Write a UserHandle to a Parcel, handling null pointers. Must be read with readFromParcel(android.os.Parcel).

Parameters
h UserHandle: The UserHandle to be written.

out Parcel: The Parcel in which the UserHandle will be placed.

writeToParcel

Added in API level 17
public 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. This value cannot be null.

flags 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