ActivityOptions.LaunchCookie

public static final class ActivityOptions.LaunchCookie
extends Object implements Parcelable

An opaque token used to track and identify a specific activity launch request.

When launching an activity, callers can generate a LaunchCookie and associate it with the launch options using ActivityOptions.setLaunchCookie(LaunchCookie). The system will track the resulting activity and task created by this launch request.

This cookie is particularly useful for tracking launches that undergo redirects or trampolines (where the initial activity immediately starts another activity), as the system automatically transfers the cookie to the final target activity and task.

System components and launchers can use this cookie to identify when a specific launched task has been established, or to guide the placement of the launched task into a specific display or container.

Summary

Fields

public static final Creator<ActivityOptions.LaunchCookie> CREATOR

Public constructors

public LaunchCookie ()

Public methods

equals

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.

hashCode

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.