PackageIdentifier

public class PackageIdentifier
extends Object

java.lang.Object
   ↳ android.app.appsearch.PackageIdentifier


This class represents a uniquely identifiable package.

Summary

Public constructors

PackageIdentifier(String packageName, byte[] sha256Certificate)

Creates a unique identifier for a package.

Public methods

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

String getPackageName()
byte[] getSha256Certificate()
int hashCode()

Returns a hash code value for the object.

Inherited methods

Public constructors

PackageIdentifier

Added in API level 31
public PackageIdentifier (String packageName, 
                byte[] sha256Certificate)

Creates a unique identifier for a package.

SHA-256 certificate digests for a signed application can be retrieved with the apksigner tool that is part of the Android SDK build tools. Use apksigner verify --print-certs path/to/apk.apk to retrieve the SHA-256 certificate digest for the target application. Once retrieved, the SHA-256 certificate digest should be converted to a byte[] by decoding it in base16:

 new android.content.pm.Signature(outputDigest).toByteArray();
 

Parameters
packageName String: Name of the package. This value cannot be null.

sha256Certificate byte: SHA-256 certificate digest of the package. This value cannot be null.

Public methods

equals

Added in API level 31
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.

getPackageName

Added in API level 31
public String getPackageName ()

Returns
String This value cannot be null.

getSha256Certificate

Added in API level 31
public byte[] getSha256Certificate ()

Returns
byte[] This value cannot be null.

hashCode

Added in API level 31
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.