Android - An Open Handset Alliance Project

java.lang.ref
public class

java.lang.ref.PhantomReference

java.lang.Object
	java.lang.ref.Reference
		java.lang.ref.PhantomReference

PhantomReference objects are used to detect referents which are no longer visible and are eligible to have their storage reclaimed.

					PhantomReference(T r, ReferenceQueue q)
					Constructs a new instance of this class.

				T	get()
					Return the referent of the reference object.

	Object	clone()
		Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
	boolean	equals(Object o)
		Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
	void	finalize()
		Called by the virtual machine when there are no longer any (non-weak) references to the receiver.
final	Class	getClass()
		Answers the unique instance of java.lang.Class which represents the class of the receiver.
	int	hashCode()
		Answers an integer hash code for the receiver.
final	void	notify()
		Causes one thread which is `wait` ing on the receiver to be made ready to run.
final	void	notifyAll()
		Causes all threads which are `wait` ing on the receiver to be made ready to run.
	String	toString()
		Answers a string containing a concise, human-readable description of the receiver.
final	void	wait(long time, int frac)
		Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by `notify` or `notifyAll`) or the expiration of the timeout.
final	void	wait(long time)
		Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by `notify` or `notifyAll`) or the expiration of the timeout.
final	void	wait()
		Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by `notify` or `notifyAll`).

Constructs a new instance of this class.

r	referent to track.
q	queue to register to the reference object with.

Return the referent of the reference object. Phantom reference objects referents are inaccessible, and so null is returned.

				void	clear()
					Make the referent null.
				boolean	enqueue()
					Force the reference object to be enqueued if it has been associated with a queue.
				T	get()
					Return the referent of the reference object.
				boolean	isEnqueued()
					Return whether the reference object has been enqueued.


e.g. "intent" or "activity"