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Added in API level 11

ValueAnimator

public class ValueAnimator
extends Animator

java.lang.Object
↳	android.animation.Animator
	↳	android.animation.ValueAnimator

Known Direct Subclasses

ObjectAnimator, TimeAnimator

This class provides a simple timing engine for running animations which calculate animated values and set them on target objects.

There is a single timing pulse that all animations use. It runs in a custom handler to ensure that property changes happen on the UI thread.

By default, ValueAnimator uses non-linear time interpolation, via the AccelerateDecelerateInterpolator class, which accelerates into and decelerates out of an animation. This behavior can be changed by calling setInterpolator(TimeInterpolator).

Animators can be created from either code or resource files. Here is an example of a ValueAnimator resource file:

<animator xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="1000"
    android:valueFrom="1"
    android:valueTo="0"
    android:valueType="floatType"
    android:repeatCount="1"
    android:repeatMode="reverse"/>

It is also possible to use a combination of PropertyValuesHolder and Keyframe resource tags to create a multi-step animation. Note that you can specify explicit fractional values (from 0 to 1) for each keyframe to determine when, in the overall duration, the animation should arrive at that value. Alternatively, you can leave the fractions off and the keyframes will be equally distributed within the total duration:

<animator xmlns:android="http://schemas.android.com/apk/res/android"
          android:duration="1000"
          android:repeatCount="1"
          android:repeatMode="reverse">
    <propertyValuesHolder>
        <keyframe android:fraction="0" android:value="1"/>
        <keyframe android:fraction=".2" android:value=".4"/>
        <keyframe android:fraction="1" android:value="0"/>
    </propertyValuesHolder>
</animator>

Developer Guides

For more information about animating with ValueAnimator, read the Property Animation developer guide.

Summary

Nested classes
`interface`	`ValueAnimator.AnimatorUpdateListener` Implementors of this interface can add themselves as update listeners to an `ValueAnimator` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `ValueAnimator`.

Constants
`int`	`INFINITE` This value used used with the `setRepeatCount(int)` property to repeat the animation indefinitely.
`int`	`RESTART` When the animation reaches the end and `repeatCount` is INFINITE or a positive value, the animation restarts from the beginning.
`int`	`REVERSE` When the animation reaches the end and `repeatCount` is INFINITE or a positive value, the animation reverses direction on every iteration.

Inherited constants

From class


    android.animation.Animator

Public constructors
`ValueAnimator()` Creates a new ValueAnimator object.

Public methods
`void`	`addUpdateListener(ValueAnimator.AnimatorUpdateListener listener)` Adds a listener to the set of listeners that are sent update events through the life of an animation.
`void`	`cancel()` Cancels the animation.
`ValueAnimator`	`clone()` Creates and returns a copy of this object.
`void`	`end()` Ends the animation.
`float`	`getAnimatedFraction()` Returns the current animation fraction, which is the elapsed/interpolated fraction used in the most recent frame update on the animation.
`Object`	`getAnimatedValue()` The most recent value calculated by this `ValueAnimator` when there is just one property being animated.
`Object`	`getAnimatedValue(String propertyName)` The most recent value calculated by this `ValueAnimator` for `propertyName`.
`long`	`getCurrentPlayTime()` Gets the current position of the animation in time, which is equal to the current time minus the time that the animation started.
`long`	`getDuration()` Gets the length of the animation.
`static long`	`getFrameDelay()` The amount of time, in milliseconds, between each frame of the animation.
`TimeInterpolator`	`getInterpolator()` Returns the timing interpolator that this ValueAnimator uses.
`int`	`getRepeatCount()` Defines how many times the animation should repeat.
`int`	`getRepeatMode()` Defines what this animation should do when it reaches the end.
`long`	`getStartDelay()` The amount of time, in milliseconds, to delay starting the animation after `start()` is called.
`long`	`getTotalDuration()` Gets the total duration of the animation, accounting for animation sequences, start delay, and repeating.
`PropertyValuesHolder[]`	`getValues()` Returns the values that this ValueAnimator animates between.
`boolean`	`isRunning()` Returns whether this Animator is currently running (having been started and gone past any initial startDelay period and not yet ended).
`boolean`	`isStarted()` Returns whether this Animator has been started and not yet ended.
`static ValueAnimator`	`ofArgb(int... values)` Constructs and returns a ValueAnimator that animates between color values.
`static ValueAnimator`	`ofFloat(float... values)` Constructs and returns a ValueAnimator that animates between float values.
`static ValueAnimator`	`ofInt(int... values)` Constructs and returns a ValueAnimator that animates between int values.
`static ValueAnimator`	`ofObject(TypeEvaluator evaluator, Object... values)` Constructs and returns a ValueAnimator that animates between Object values.
`static ValueAnimator`	`ofPropertyValuesHolder(PropertyValuesHolder... values)` Constructs and returns a ValueAnimator that animates between the values specified in the PropertyValuesHolder objects.
`void`	`pause()` Pauses a running animation.
`void`	`removeAllUpdateListeners()` Removes all listeners from the set listening to frame updates for this animation.
`void`	`removeUpdateListener(ValueAnimator.AnimatorUpdateListener listener)` Removes a listener from the set listening to frame updates for this animation.
`void`	`resume()` Resumes a paused animation, causing the animator to pick up where it left off when it was paused.
`void`	`reverse()` Plays the ValueAnimator in reverse.
`void`	`setCurrentFraction(float fraction)` Sets the position of the animation to the specified fraction.
`void`	`setCurrentPlayTime(long playTime)` Sets the position of the animation to the specified point in time.
`ValueAnimator`	`setDuration(long duration)` Sets the length of the animation.
`void`	`setEvaluator(TypeEvaluator value)` The type evaluator to be used when calculating the animated values of this animation.
`void`	`setFloatValues(float... values)` Sets float values that will be animated between.
`static void`	`setFrameDelay(long frameDelay)` The amount of time, in milliseconds, between each frame of the animation.
`void`	`setIntValues(int... values)` Sets int values that will be animated between.
`void`	`setInterpolator(TimeInterpolator value)` The time interpolator used in calculating the elapsed fraction of this animation.
`void`	`setObjectValues(Object... values)` Sets the values to animate between for this animation.
`void`	`setRepeatCount(int value)` Sets how many times the animation should be repeated.
`void`	`setRepeatMode(int value)` Defines what this animation should do when it reaches the end.
`void`	`setStartDelay(long startDelay)` The amount of time, in milliseconds, to delay starting the animation after `start()` is called.
`void`	`setValues(PropertyValuesHolder... values)` Sets the values, per property, being animated between.
`void`	`start()` Starts this animation.
`String`	`toString()` Returns a string representation of the object.

Inherited methods

From class


  
    android.animation.Animator

`void`	`addListener(Animator.AnimatorListener listener)` Adds a listener to the set of listeners that are sent events through the life of an animation, such as start, repeat, and end.
`void`	`addPauseListener(Animator.AnimatorPauseListener listener)` Adds a pause listener to this animator.
`void`	`cancel()` Cancels the animation.
`Animator`	`clone()` Creates and returns a copy of this object.
`void`	`end()` Ends the animation.
`abstract long`	`getDuration()` Gets the duration of the animation.
`TimeInterpolator`	`getInterpolator()` Returns the timing interpolator that this animation uses.
`ArrayList<Animator.AnimatorListener>`	`getListeners()` Gets the set of `Animator.AnimatorListener` objects that are currently listening for events on this `Animator` object.
`abstract long`	`getStartDelay()` The amount of time, in milliseconds, to delay processing the animation after `start()` is called.
`long`	`getTotalDuration()` Gets the total duration of the animation, accounting for animation sequences, start delay, and repeating.
`boolean`	`isPaused()` Returns whether this animator is currently in a paused state.
`abstract boolean`	`isRunning()` Returns whether this Animator is currently running (having been started and gone past any initial startDelay period and not yet ended).
`boolean`	`isStarted()` Returns whether this Animator has been started and not yet ended.
`void`	`pause()` Pauses a running animation.
`void`	`removeAllListeners()` Removes all `listeners` and `pauseListeners` from this object.
`void`	`removeListener(Animator.AnimatorListener listener)` Removes a listener from the set listening to this animation.
`void`	`removePauseListener(Animator.AnimatorPauseListener listener)` Removes a pause listener from the set listening to this animation.
`void`	`resume()` Resumes a paused animation, causing the animator to pick up where it left off when it was paused.
`abstract Animator`	`setDuration(long duration)` Sets the duration of the animation.
`abstract void`	`setInterpolator(TimeInterpolator value)` The time interpolator used in calculating the elapsed fraction of the animation.
`abstract void`	`setStartDelay(long startDelay)` The amount of time, in milliseconds, to delay processing the animation after `start()` is called.
`void`	`setTarget(Object target)` Sets the target object whose property will be animated by this animation.
`void`	`setupEndValues()` This method tells the object to use appropriate information to extract ending values for the animation.
`void`	`setupStartValues()` This method tells the object to use appropriate information to extract starting values for the animation.
`void`	`start()` Starts this animation.

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Constants

INFINITE

Added in API level 11

int INFINITE

This value used used with the setRepeatCount(int) property to repeat the animation indefinitely.

Constant Value: -1 (0xffffffff)

RESTART

Added in API level 11

int RESTART

When the animation reaches the end and repeatCount is INFINITE or a positive value, the animation restarts from the beginning.

Constant Value: 1 (0x00000001)

REVERSE

Added in API level 11

int REVERSE

When the animation reaches the end and repeatCount is INFINITE or a positive value, the animation reverses direction on every iteration.

Constant Value: 2 (0x00000002)

Parameters
`evaluator`	`TypeEvaluator`: A TypeEvaluator that will be called on each animation frame to provide the ncessry interpolation between the Object values to derive the animated value.
`values`	`Object`: A set of values that the animation will animate between over time.

Most visited

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Results for

ValueAnimator

Developer Guides

Summary

Nested classes

Constants

Inherited constants

Public constructors

Public methods

Inherited methods

Constants

INFINITE

RESTART

REVERSE

Public constructors

ValueAnimator

Public methods

addUpdateListener

cancel

clone

end

getAnimatedFraction

getAnimatedValue

getAnimatedValue

getCurrentPlayTime

getDuration

getFrameDelay

getInterpolator

getRepeatCount

getRepeatMode

getStartDelay

getTotalDuration

getValues

isRunning

isStarted

ofArgb

ofFloat

ofInt

ofObject

ofPropertyValuesHolder

pause

removeAllUpdateListeners

removeUpdateListener

resume

reverse

setCurrentFraction

setCurrentPlayTime

setDuration

setEvaluator

setFloatValues

setFrameDelay

setIntValues

setInterpolator

setObjectValues

setRepeatCount

setRepeatMode

setStartDelay

setValues

start

toString