public
class
Signature
extends Object
implements
Parcelable
java.lang.Object | |
↳ | android.content.pm.Signature |
Opaque, immutable representation of a signing certificate associated with an application package.
This class name is slightly misleading, since it's not actually a signature.
Inherited constants |
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From
interface
android.os.Parcelable
|
Fields | |
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public
static
final
Creator<Signature> |
CREATOR
|
Public constructors | |
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Signature(byte[] signature)
Create Signature from an existing raw byte array. |
|
Signature(String text)
Create Signature from a text representation previously returned by
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Public methods | |
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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. |
int
|
hashCode()
Returns a hash code value for the object. |
byte[]
|
toByteArray()
|
char[]
|
toChars()
Encode the Signature as ASCII text. |
char[]
|
toChars(char[] existingArray, int[] outLen)
Encode the Signature as ASCII text in to an existing array. |
String
|
toCharsString()
Return the result of |
void
|
writeToParcel(Parcel dest, int parcelableFlags)
Flatten this object in to a Parcel. |
Inherited methods | |
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From
class
java.lang.Object
| |
From
interface
android.os.Parcelable
|
Signature (byte[] signature)
Create Signature from an existing raw byte array.
Parameters | |
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signature |
byte
|
Signature (String text)
Create Signature from a text representation previously returned by
toChars()
or toCharsString()
. Signatures are expected to
be a hex-encoded ASCII string.
Parameters | |
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text |
String :
hex-encoded string representing the signature |
Throws | |
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IllegalArgumentException |
when signature is odd-length |
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 | |
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obj |
Object :
the reference object with which to compare. |
Returns | |
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boolean |
true if this object is the same as the obj
argument; false otherwise. |
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 | |
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int |
a hash code value for this object. |
byte[] toByteArray ()
Returns | |
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byte[] |
the contents of this signature as a byte array. |
char[] toChars (char[] existingArray, int[] outLen)
Encode the Signature as ASCII text in to an existing array.
Parameters | |
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existingArray |
char :
Existing char array or null. |
outLen |
int :
Output parameter for the number of characters written in
to the array. |
Returns | |
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char[] |
Returns either existingArray if it was large enough to hold the ASCII representation, or a newly created char[] array if needed. |
String toCharsString ()
Return the result of toChars()
as a String.
Returns | |
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String |
void writeToParcel (Parcel dest, int parcelableFlags)
Flatten this object in to a Parcel.
Parameters | |
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dest |
Parcel :
The Parcel in which the object should be written. |
parcelableFlags |
int :
Additional flags about how the object should be written.
May be 0 or PARCELABLE_WRITE_RETURN_VALUE .
|