public class


extends Object
Known Direct Subclasses

Class Overview

MaskFilter is the base class for object that perform transformations on an alpha-channel mask before drawing it. A subclass of MaskFilter may be installed into a Paint. Blur and emboss are implemented as subclasses of MaskFilter.


Public Constructors
Protected Methods
void finalize()
Called before the object's memory is reclaimed by the VM.
Inherited Methods
From class java.lang.Object

Public Constructors

public MaskFilter ()

Since: API Level 1

Protected Methods

protected void finalize ()

Since: API Level 1

Called before the object's memory is reclaimed by the VM. This can only happen once the garbage collector has detected that the object is no longer reachable by any thread of the running application.

The method can be used to free system resources or perform other cleanup before the object is garbage collected. The default implementation of the method is empty, which is also expected by the VM, but subclasses can override finalize() as required. Uncaught exceptions which are thrown during the execution of this method cause it to terminate immediately but are otherwise ignored.

Note that the VM does guarantee that finalize() is called at most once for any object, but it doesn't guarantee when (if at all) finalize() will be called. For example, object B's finalize() can delay the execution of object A's finalize() method and therefore it can delay the reclamation of A's memory. To be safe, use a ReferenceQueue, because it provides more control over the way the VM deals with references during garbage collection.