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public
final
class
BlobHandle
extends Object
implements
Parcelable
java.lang.Object | |
↳ | android.app.blob.BlobHandle |
An identifier to represent a blob.
Inherited constants |
---|
Fields | |
---|---|
public
static
final
Creator<BlobHandle> |
CREATOR
|
Public methods | |
---|---|
static
BlobHandle
|
createWithSha256(byte[] digest, CharSequence label, long expiryTimeMillis, String tag)
Create a new blob identifier. |
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. |
long
|
getExpiryTimeMillis()
Returns the expiry time in milliseconds of the blob that this object is representing, in
|
CharSequence
|
getLabel()
Returns the label associated with the blob that this object is representing. |
byte[]
|
getSha256Digest()
Returns the SHA-256 hash of the blob that this object is representing. |
String
|
getTag()
Returns the opaque |
int
|
hashCode()
Returns a hash code value for the object. |
String
|
toString()
Returns a string representation of the object. |
void
|
writeToParcel(Parcel dest, int flags)
Flatten this object in to a Parcel. |
Inherited methods | |
---|---|
public static BlobHandle createWithSha256 (byte[] digest, CharSequence label, long expiryTimeMillis, String tag)
Create a new blob identifier.
For two objects of BlobHandle
to be considered equal, the following arguments
must be equal:
digest
label
expiryTimeMillis
tag
Parameters | |
---|---|
digest |
byte : the SHA-256 hash of the blob this is representing.
This value cannot be null . |
label |
CharSequence : a label indicating what the blob is, that can be surfaced to the user.
The length of the label cannot be more than 100 characters. It is recommended
to keep this brief. This may be truncated and ellipsized if it is too long
to be displayed to the user.
This value cannot be null . |
expiryTimeMillis |
long : the time in secs after which the blob should be invalidated and not
allowed to be accessed by any other app,
in System#currentTimeMillis() timebase or 0 to
indicate that there is no expiry time associated with this blob.
Value is a non-negative timestamp measured as the number of
milliseconds since 1970-01-01T00:00:00Z. |
tag |
String : an opaque String associated with the blob. The length of the tag
cannot be more than 128 characters.
This value cannot be null . |
Returns | |
---|---|
BlobHandle |
a new instance of BlobHandle object.
This value cannot be null . |
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 |
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:
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. |
public long getExpiryTimeMillis ()
Returns the expiry time in milliseconds of the blob that this object is representing, in
System#currentTimeMillis()
timebase.
Value is a non-negative timestamp measured as the number of
milliseconds since 1970-01-01T00:00:00Z.
Returns | |
---|---|
long |
Value is a non-negative timestamp measured as the number of milliseconds since 1970-01-01T00:00:00Z. |
public CharSequence getLabel ()
Returns the label associated with the blob that this object is representing.
Returns | |
---|---|
CharSequence |
This value cannot be null . |
public byte[] getSha256Digest ()
Returns the SHA-256 hash of the blob that this object is representing.
Returns | |
---|---|
byte[] |
This value cannot be null . |
public String getTag ()
Returns the opaque String
associated with the blob this object is representing.
Returns | |
---|---|
String |
This value cannot be null . |
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:
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
Java™ programming language.)
Returns | |
---|---|
int |
a hash code value for this object. |
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. |
public void writeToParcel (Parcel dest, int flags)
Flatten this object in to a Parcel.
Parameters | |
---|---|
dest |
Parcel : 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 |