MaskFilter
  public
  
  
  
  class
  MaskFilter
  
    extends Object
  
  
  
  
  
  
| java.lang.Object | |
| ↳ | android.graphics.MaskFilter | 
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.
Summary
| Public constructors | |
|---|---|
| 
      MaskFilter()
       | |
| Protected methods | |
|---|---|
| 
        
        
        
        
        
        void | 
      finalize()
      Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | 
| Inherited methods | |
|---|---|
Public constructors
MaskFilter
public MaskFilter ()
Protected methods
finalize
protected void finalize ()
Called by the garbage collector on an object when garbage collection
 determines that there are no more references to the object.
 A subclass overrides the finalize method to dispose of
 system resources or to perform other cleanup.
 
 The general contract of finalize is that it is invoked
 if and when the Java virtual
 machine has determined that there is no longer any
 means by which this object can be accessed by any thread that has
 not yet died, except as a result of an action taken by the
 finalization of some other object or class which is ready to be
 finalized. The finalize method may take any action, including
 making this object available again to other threads; the usual purpose
 of finalize, however, is to perform cleanup actions before
 the object is irrevocably discarded. For example, the finalize method
 for an object that represents an input/output connection might perform
 explicit I/O transactions to break the connection before the object is
 permanently discarded.
 
 The finalize method of class Object performs no
 special action; it simply returns normally. Subclasses of
 Object may override this definition.
 
 The Java programming language does not guarantee which thread will
 invoke the finalize method for any given object. It is
 guaranteed, however, that the thread that invokes finalize will not
 be holding any user-visible synchronization locks when finalize is
 invoked. If an uncaught exception is thrown by the finalize method,
 the exception is ignored and finalization of that object terminates.
 
 After the finalize method has been invoked for an object, no
 further action is taken until the Java virtual machine has again
 determined that there is no longer any means by which this object can
 be accessed by any thread that has not yet died, including possible
 actions by other objects or classes which are ready to be finalized,
 at which point the object may be discarded.
 
 The finalize method is never invoked more than once by a Java
 virtual machine for any given object.
 
 Any exception thrown by the finalize method causes
 the finalization of this object to be halted, but is otherwise
 ignored.
| Throws | |
|---|---|
| Throwable | |
