Signature
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.
Summary
Inherited constants |
|---|
android.os.Parcelable
|
Fields | |
|---|---|
public
static
final
Creator<Signature> |
CREATOR
|
Public constructors | |
|---|---|
Signature(byte[] signature)
Create Signature from an existing raw byte array. |
|
Signature(String text)
Create Signature from a text representation previously returned by
|
|
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. |
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 | |
|---|---|
java.lang.Object
| |
android.os.Parcelable
| |
Fields
Public constructors
Signature
Signature (byte[] signature)
Create Signature from an existing raw byte array.
| Parameters | |
|---|---|
signature |
byte |
Signature
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 | |
|---|---|
text |
String: hex-encoded string representing the signature |
| Throws | |
|---|---|
IllegalArgumentException |
when signature is odd-length |
Public methods
describeContents
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. |
equals
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 returntrue. - It is symmetric: for any non-null reference values
xandy,x.equals(y)should returntrueif and only ify.equals(x)returnstrue. - It is transitive: for any non-null reference values
x,y, andz, ifx.equals(y)returnstrueandy.equals(z)returnstrue, thenx.equals(z)should returntrue. - It is consistent: for any non-null reference values
xandy, multiple invocations ofx.equals(y)consistently returntrueor consistently returnfalse, provided no information used inequalscomparisons on the objects is modified. - For any non-null reference value
x,x.equals(null)should returnfalse.
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. |
hashCode
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
hashCodemethod must consistently return the same integer, provided no information used inequalscomparisons 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(Object)method, then calling thehashCodemethod 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(java.lang.Object)method, then calling thehashCodemethod 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. |
toByteArray
byte[] toByteArray ()
| Returns | |
|---|---|
byte[] |
the contents of this signature as a byte array. |
toChars
char[] toChars (char[] existingArray,
int[] outLen)
Encode the Signature as ASCII text in to an existing array.
| Parameters | |
|---|---|
existingArray |
char: Existing char array or null. |
outLen |
int: Output parameter for the number of characters written in
to the array. |
| Returns | |
|---|---|
char[] |
Returns either existingArray if it was large enough to hold the ASCII representation, or a newly created char[] array if needed. |
toCharsString
String toCharsString ()
Return the result of toChars() as a String.
| Returns | |
|---|---|
String |
|
writeToParcel
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. |
parcelableFlags |
int: Additional flags about how the object should be written.
May be 0 or PARCELABLE_WRITE_RETURN_VALUE.
|
Classes
- ActivityInfo
- ActivityInfo.WindowLayout
- ApplicationInfo
- ApplicationInfo.DisplayNameComparator
- ChangedPackages
- ComponentInfo
- ConfigurationInfo
- FeatureGroupInfo
- FeatureInfo
- InstrumentationInfo
- LabeledIntent
- LauncherActivityInfo
- LauncherApps
- LauncherApps.Callback
- LauncherApps.PinItemRequest
- LauncherApps.ShortcutQuery
- PackageInfo
- PackageInstaller
- PackageInstaller.Session
- PackageInstaller.SessionCallback
- PackageInstaller.SessionInfo
- PackageInstaller.SessionParams
- PackageItemInfo
- PackageItemInfo.DisplayNameComparator
- PackageManager
- PackageStats
- PathPermission
- PermissionGroupInfo
- PermissionInfo
- ProviderInfo
- ResolveInfo
- ResolveInfo.DisplayNameComparator
- ServiceInfo
- SharedLibraryInfo
- ShortcutInfo
- ShortcutInfo.Builder
- ShortcutManager
- Signature
- VersionedPackage
Exceptions