Since: API Level 1

public class

ScaleAnimation

extends Animation

java.lang.Object
↳	android.view.animation.Animation
	↳	android.view.animation.ScaleAnimation

Class Overview

An animation that controls the scale of an object. You can specify the point to use for the center of scaling.

Summary

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Inherited XML Attributes

From class android.view.animation.Animation

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Inherited Constants

From class android.view.animation.Animation

Public Constructors
	ScaleAnimation(Context context, AttributeSet attrs) Constructor used when a ScaleAnimation is loaded from a resource.
	ScaleAnimation(float fromX, float toX, float fromY, float toY) Constructor to use when building a ScaleAnimation from code
	ScaleAnimation(float fromX, float toX, float fromY, float toY, float pivotX, float pivotY) Constructor to use when building a ScaleAnimation from code
	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
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.

Protected Methods
void	applyTransformation(float interpolatedTime, Transformation t) Helper for getTransformation.

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Inherited Methods

From class android.view.animation.Animation

void	applyTransformation(float interpolatedTime, Transformation t) Helper for getTransformation.
void	cancel() Cancel the animation.
Animation	clone() Creates and returns a copy of this `Object`.
long	computeDurationHint() Compute a hint at how long the entire animation may last, in milliseconds.
void	ensureInterpolator() Gurantees that this animation has an interpolator.
void	finalize() Called before the object's memory is reclaimed by the VM.
boolean	getDetachWallpaper() Return value of `setDetachWallpaper(boolean)`.
long	getDuration() How long this animation should last
boolean	getFillAfter() If fillAfter is true, this animation will apply its transformation after the end time of the animation.
boolean	getFillBefore() If fillBefore is true, this animation will apply its transformation before the start time of the animation.
Interpolator	getInterpolator() Gets the acceleration curve type for this animation.
int	getRepeatCount() Defines how many times the animation should repeat.
int	getRepeatMode() Defines what this animation should do when it reaches the end.
float	getScaleFactor() The scale factor is set by the call to `getTransformation`.
long	getStartOffset() When this animation should start, relative to StartTime
long	getStartTime() When this animation should start.
boolean	getTransformation(long currentTime, Transformation outTransformation, float scale) Gets the transformation to apply at a specified point in time.
boolean	getTransformation(long currentTime, Transformation outTransformation) Gets the transformation to apply at a specified point in time.
int	getZAdjustment() Returns the Z ordering mode to use while running the animation as previously set by `setZAdjustment(int)`.
boolean	hasEnded() Indicates whether this animation has ended or not.
boolean	hasStarted() Indicates whether this animation has started or not.
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.
boolean	isFillEnabled() If fillEnabled is true, this animation will apply fillBefore and fillAfter.
boolean	isInitialized() Whether or not the animation has been initialized.
void	reset() Reset the initialization state of this animation.
float	resolveSize(int type, float value, int size, int parentSize) Convert the information in the description of a size to an actual dimension
void	restrictDuration(long durationMillis) Ensure that the duration that this animation will run is not longer than `durationMillis`.
void	scaleCurrentDuration(float scale) How much to scale the duration by.
void	setAnimationListener(Animation.AnimationListener listener) Binds an animation listener to this animation.
void	setDetachWallpaper(boolean detachWallpaper) If detachWallpaper is true, and this is a window animation of a window that has a wallpaper background, then the window will be detached from the wallpaper while it runs.
void	setDuration(long durationMillis) How long this animation should last.
void	setFillAfter(boolean fillAfter) If fillAfter is true, the transformation that this animation performed will persist when it is finished.
void	setFillBefore(boolean fillBefore) If fillBefore is true, this animation will apply its transformation before the start time of the animation.
void	setFillEnabled(boolean fillEnabled) If fillEnabled is true, the animation will apply the value of fillBefore and fillAfter.
void	setInterpolator(Context context, int resID) Sets the acceleration curve for this animation.
void	setInterpolator(Interpolator i) Sets the acceleration curve for this animation.
void	setRepeatCount(int repeatCount) Sets how many times the animation should be repeated.
void	setRepeatMode(int repeatMode) Defines what this animation should do when it reaches the end.
void	setStartOffset(long startOffset) When this animation should start relative to the start time.
void	setStartTime(long startTimeMillis) When this animation should start.
void	setZAdjustment(int zAdjustment) Set the Z ordering mode to use while running the animation.
void	start() Convenience method to start the animation the first time `getTransformation(long, Transformation)` is invoked.
void	startNow() Convenience method to start the animation at the current time in milliseconds.
boolean	willChangeBounds() Indicates whether or not this animation will affect the bounds of the animated view.
boolean	willChangeTransformationMatrix() Indicates whether or not this animation will affect the transformation matrix.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Called before the object's memory is reclaimed by the VM.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public ScaleAnimation (Context context, AttributeSet attrs)

Since: API Level 1

Constructor used when a ScaleAnimation is loaded from a resource.

Parameters

context	Application context to use
attrs	Attribute set from which to read values

public ScaleAnimation (float fromX, float toX, float fromY, float toY)

Since: API Level 1

Constructor to use when building a ScaleAnimation from code

Parameters

fromX	Horizontal scaling factor to apply at the start of the animation
toX	Horizontal scaling factor to apply at the end of the animation
fromY	Vertical scaling factor to apply at the start of the animation
toY	Vertical scaling factor to apply at the end of the animation

public ScaleAnimation (float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)

Since: API Level 1

Constructor to use when building a ScaleAnimation from code

Parameters

fromX	Horizontal scaling factor to apply at the start of the animation
toX	Horizontal scaling factor to apply at the end of the animation
fromY	Vertical scaling factor to apply at the start of the animation
toY	Vertical scaling factor to apply at the end of the animation
pivotX	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	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.)

public ScaleAnimation (float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue)

Since: API Level 1

Constructor to use when building a ScaleAnimation from code

Parameters

fromX	Horizontal scaling factor to apply at the start of the animation
toX	Horizontal scaling factor to apply at the end of the animation
fromY	Vertical scaling factor to apply at the start of the animation
toY	Vertical scaling factor to apply at the end of the animation
pivotXType	Specifies how pivotXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
pivotXValue	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	Specifies how pivotYValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
pivotYValue	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.

Public Methods

public void initialize (int width, int height, int parentWidth, int parentHeight)

Since: API Level 1

Initialize this animation with the dimensions of the object being animated as well as the objects parents. (This is to support animation sizes being specifed 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

width	Width of the object being animated
height	Height of the object being animated
parentWidth	Width of the animated object's parent
parentHeight	Height of the animated object's parent

Protected Methods

protected void applyTransformation (float interpolatedTime, Transformation t)

Since: API Level 1

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

interpolatedTime	The value of the normalized time (0.0 to 1.0) after it has been run through the interpolation function.
t	The Transofrmation object to fill in with the current transforms.

Interfaces

Classes

ScaleAnimation

Class Overview

Summary

Public Constructors

public ScaleAnimation (Context context, AttributeSet attrs)

Parameters

public ScaleAnimation (float fromX, float toX, float fromY, float toY)

Parameters

public ScaleAnimation (float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)

Parameters

public ScaleAnimation (float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue)

Parameters

Public Methods

public void initialize (int width, int height, int parentWidth, int parentHeight)

Parameters

Protected Methods

protected void applyTransformation (float interpolatedTime, Transformation t)

Parameters