java.lang.Object | |
↳ | android.graphics.Shader |
Known Direct Subclasses |
Shader is the based class for objects that return horizontal spans of colors during drawing. A subclass of Shader is installed in a Paint calling paint.setShader(shader). After that any object (other than a bitmap) that is drawn with that paint will get its color(s) from the shader.
Nested Classes | |||||||||||
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Shader.TileMode |
Public Constructors | |||||||||||
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Public Methods | |||||||||||
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Return true if the shader has a non-identity local matrix.
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Set the shader's local matrix.
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Protected Methods | |||||||||||
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Is called before the object's memory is being reclaimed by the VM.
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Inherited Methods | |||||||||||
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From class java.lang.Object
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Return true if the shader has a non-identity local matrix.
localM | If not null, it is set to the shader's local matrix. |
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Set the shader's local matrix. Passing null will reset the shader's matrix to identity
localM | The shader's new local matrix, or null to specify identity |
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Is called before the object's memory is being reclaimed by the VM. This can only happen once the VM has detected, during a run of the garbage collector, 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.
Throwable |
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