public
class
ScaleAnimation
extends Animation
java.lang.Object | ||
↳ | android.view.animation.Animation | |
↳ | android.view.animation.ScaleAnimation |
An animation that controls the scale of an object. You can specify the point to use for the center of scaling.
Inherited XML attributes | |
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From
class
android.view.animation.Animation
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Inherited constants |
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From
class
android.view.animation.Animation
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Public constructors | |
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ScaleAnimation(Context context, AttributeSet attrs)
Constructor used when a ScaleAnimation is loaded from a resource. |
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ScaleAnimation(float fromX, float toX, float fromY, float toY)
Constructor to use when building a ScaleAnimation from code |
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ScaleAnimation(float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)
Constructor to use when building a ScaleAnimation from code |
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ScaleAnimation(float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue)
Constructor to use when building a ScaleAnimation from code |
Public methods | |
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void
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initialize(int width, int height, int parentWidth, int parentHeight)
Initialize this animation with the dimensions of the object being animated as well as the objects parents. |
Protected methods | |
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void
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applyTransformation(float interpolatedTime, Transformation t)
Helper for getTransformation. |
Inherited methods | |
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From
class
android.view.animation.Animation
| |
From
class
java.lang.Object
|
ScaleAnimation (Context context, AttributeSet attrs)
Constructor used when a ScaleAnimation is loaded from a resource.
Parameters | |
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context |
Context :
Application context to use |
attrs |
AttributeSet :
Attribute set from which to read values
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ScaleAnimation (float fromX, float toX, float fromY, float toY)
Constructor to use when building a ScaleAnimation from code
Parameters | |
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fromX |
float :
Horizontal scaling factor to apply at the start of the
animation |
toX |
float :
Horizontal scaling factor to apply at the end of the animation |
fromY |
float :
Vertical scaling factor to apply at the start of the
animation |
toY |
float :
Vertical scaling factor to apply at the end of the animation
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ScaleAnimation (float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)
Constructor to use when building a ScaleAnimation from code
Parameters | |
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fromX |
float :
Horizontal scaling factor to apply at the start of the
animation |
toX |
float :
Horizontal scaling factor to apply at the end of the animation |
fromY |
float :
Vertical scaling factor to apply at the start of the
animation |
toY |
float :
Vertical scaling factor to apply at the end of the animation |
pivotX |
float :
The X coordinate of the point about which the object is
being scaled, specified as an absolute number where 0 is the left
edge. (This point remains fixed while the object changes size.) |
pivotY |
float :
The Y coordinate of the point about which the object is
being scaled, specified as an absolute number where 0 is the top
edge. (This point remains fixed while the object changes size.)
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ScaleAnimation (float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue)
Constructor to use when building a ScaleAnimation from code
Parameters | |
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fromX |
float :
Horizontal scaling factor to apply at the start of the
animation |
toX |
float :
Horizontal scaling factor to apply at the end of the animation |
fromY |
float :
Vertical scaling factor to apply at the start of the
animation |
toY |
float :
Vertical scaling factor to apply at the end of the animation |
pivotXType |
int :
Specifies how pivotXValue should be interpreted. One of
Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or
Animation.RELATIVE_TO_PARENT. |
pivotXValue |
float :
The X coordinate of the point about which the object
is being scaled, specified as an absolute number where 0 is the
left edge. (This point remains fixed while the object changes
size.) This value can either be an absolute number if pivotXType
is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise. |
pivotYType |
int :
Specifies how pivotYValue should be interpreted. One of
Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or
Animation.RELATIVE_TO_PARENT. |
pivotYValue |
float :
The Y coordinate of the point about which the object
is being scaled, specified as an absolute number where 0 is the
top edge. (This point remains fixed while the object changes
size.) This value can either be an absolute number if pivotYType
is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.
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void initialize (int width, int height, int parentWidth, int parentHeight)
Initialize this animation with the dimensions of the object being animated as well as the objects parents. (This is to support animation sizes being specified relative to these dimensions.)
Objects that interpret Animations should call this method when
the sizes of the object being animated and its parent are known, and
before calling getTransformation(long, Transformation)
.
Parameters | |
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width |
int :
Width of the object being animated |
height |
int :
Height of the object being animated |
parentWidth |
int :
Width of the animated object's parent |
parentHeight |
int :
Height of the animated object's parent
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void applyTransformation (float interpolatedTime, Transformation t)
Helper for getTransformation. Subclasses should implement this to apply their transforms given an interpolation value. Implementations of this method should always replace the specified Transformation or document they are doing otherwise.
Parameters | |
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interpolatedTime |
float :
The value of the normalized time (0.0 to 1.0)
after it has been run through the interpolation function. |
t |
Transformation :
The Transformation object to fill in with the current
transforms.
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