AnimatorSet
class AnimatorSet : Animator
| kotlin.Any | ||
| ↳ | android.animation.Animator | |
| ↳ | android.animation.AnimatorSet | |
This class plays a set of Animator objects in the specified order. Animations can be set up to play together, in sequence, or after a specified delay.
There are two different approaches to adding animations to a AnimatorSet: either the playTogether() or playSequentially() methods can be called to add a set of animations all at once, or the AnimatorSet#play(Animator) can be used in conjunction with methods in the Builder class to add animations one by one.
It is possible to set up a AnimatorSet with circular dependencies between its animations. For example, an animation a1 could be set up to start before animation a2, a2 before a3, and a3 before a1. The results of this configuration are undefined, but will typically result in none of the affected animations being played. Because of this (and because circular dependencies do not make logical sense anyway), circular dependencies should be avoided, and the dependency flow of animations should only be in one direction.
Summary
| Nested classes | |
|---|---|
|
The |
|
| Inherited constants | |
|---|---|
| Public constructors | |
|---|---|
| Public methods | |
|---|---|
| Unit |
cancel()Cancels the animation. |
| AnimatorSet |
clone() |
| Unit |
end()Ends the animation. |
| ArrayList<Animator!>! |
Returns the current list of child Animator objects controlled by this AnimatorSet. |
| Long |
Returns the milliseconds elapsed since the start of the animation. |
| Long |
Gets the length of each of the child animations of this AnimatorSet. |
| TimeInterpolator! | |
| Long |
The amount of time, in milliseconds, to delay starting the animation after |
| Long | |
| Boolean |
Returns true if any of the child animations of this AnimatorSet have been started and have not yet ended. |
| Boolean | |
| Unit |
pause() |
| AnimatorSet.Builder! |
This method creates a |
| Unit |
playSequentially(vararg items: Animator!)Sets up this AnimatorSet to play each of the supplied animations when the previous animation ends. |
| Unit |
playSequentially(items: MutableList<Animator!>!)Sets up this AnimatorSet to play each of the supplied animations when the previous animation ends. |
| Unit |
playTogether(vararg items: Animator!)Sets up this AnimatorSet to play all of the supplied animations at the same time. |
| Unit |
playTogether(items: MutableCollection<Animator!>!)Sets up this AnimatorSet to play all of the supplied animations at the same time. |
| Unit |
resume() |
| Unit |
reverse()Plays the AnimatorSet in reverse. |
| Unit |
setCurrentPlayTime(playTime: Long)Sets the position of the animation to the specified point in time. |
| AnimatorSet! |
setDuration(duration: Long)Sets the length of each of the current child animations of this AnimatorSet. |
| Unit |
setInterpolator(interpolator: TimeInterpolator!)Sets the TimeInterpolator for all current |
| Unit |
setStartDelay(startDelay: Long)The amount of time, in milliseconds, to delay starting the animation after |
| Unit |
Sets the target object for all current |
| Unit | |
| Unit | |
| Unit |
start()Starts this animation. |
| String |
toString() |
| Inherited functions | |
|---|---|
Public constructors
Public methods
cancel
fun cancel(): Unit
Cancels the animation. Unlike end(), cancel() causes the animation to stop in its tracks, sending an android.animation.Animator.AnimatorListener#onAnimationCancel(Animator) to its listeners, followed by an android.animation.Animator.AnimatorListener#onAnimationEnd(Animator) message.
This method must be called on the thread that is running the animation.
Note that canceling a AnimatorSet also cancels all of the animations that it is responsible for.
clone
fun clone(): AnimatorSet
| Return | |
|---|---|
AnimatorSet |
a clone of this instance. |
| Exceptions | |
|---|---|
java.lang.CloneNotSupportedException |
if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned. |
end
fun end(): Unit
Ends the animation. This causes the animation to assign the end value of the property being animated, then calling the android.animation.Animator.AnimatorListener#onAnimationEnd(Animator) method on its listeners.
This method must be called on the thread that is running the animation.
Note that ending a AnimatorSet also ends all of the animations that it is responsible for.
getChildAnimations
fun getChildAnimations(): ArrayList<Animator!>!
Returns the current list of child Animator objects controlled by this AnimatorSet. This is a copy of the internal list; modifications to the returned list will not affect the AnimatorSet, although changes to the underlying Animator objects will affect those objects being managed by the AnimatorSet.
| Return | |
|---|---|
ArrayList<Animator!>! |
ArrayList The list of child animations of this AnimatorSet. |
getCurrentPlayTime
fun getCurrentPlayTime(): Long
Returns the milliseconds elapsed since the start of the animation.
For ongoing animations, this method returns the current progress of the animation in terms of play time. For an animation that has not yet been started: if the animation has been seeked to a certain time via setCurrentPlayTime(long), the seeked play time will be returned; otherwise, this method will return 0.
| Return | |
|---|---|
Long |
the current position in time of the animation in milliseconds |
getDuration
fun getDuration(): Long
Gets the length of each of the child animations of this AnimatorSet. This value may be less than 0, which indicates that no duration has been set on this AnimatorSet and each of the child animations will use their own duration.
| Return | |
|---|---|
Long |
The length of the animation, in milliseconds, of each of the child animations of this AnimatorSet. |
getInterpolator
fun getInterpolator(): TimeInterpolator!
| Return | |
|---|---|
TimeInterpolator! |
The timing interpolator for this animation. |
getStartDelay
fun getStartDelay(): Long
The amount of time, in milliseconds, to delay starting the animation after start() is called.
| Return | |
|---|---|
Long |
the number of milliseconds to delay running the animation |
getTotalDuration
fun getTotalDuration(): Long
| Return | |
|---|---|
Long |
Total time an animation takes to finish, starting from the time start() is called. DURATION_INFINITE will be returned if the animation or any child animation repeats infinite times. |
isRunning
fun isRunning(): Boolean
Returns true if any of the child animations of this AnimatorSet have been started and have not yet ended. Child animations will not be started until the AnimatorSet has gone past its initial delay set through setStartDelay(long).
| Return | |
|---|---|
Boolean |
Whether this AnimatorSet has gone past the initial delay, and at least one child animation has been started and not yet ended. |
isStarted
fun isStarted(): Boolean
| Return | |
|---|---|
Boolean |
Whether the Animator has been started and not yet ended. |
play
fun play(anim: Animator!): AnimatorSet.Builder!
This method creates a Builder object, which is used to set up playing constraints. This initial play() method tells the Builder the animation that is the dependency for the succeeding commands to the Builder. For example, calling play(a1).with(a2) sets up the AnimatorSet to play a1 and a2 at the same time, play(a1).before(a2) sets up the AnimatorSet to play a1 first, followed by a2, and play(a1).after(a2) sets up the AnimatorSet to play a2 first, followed by a1.
Note that play() is the only way to tell the Builder the animation upon which the dependency is created, so successive calls to the various functions in Builder will all refer to the initial parameter supplied in play() as the dependency of the other animations. For example, calling play(a1).before(a2).before(a3) will play both a2 and a3 when a1 ends; it does not set up a dependency between a2 and a3.
| Parameters | |
|---|---|
anim |
Animator!: The animation that is the dependency used in later calls to the methods in the returned Builder object. A null parameter will result in a null Builder return value. |
| Return | |
|---|---|
AnimatorSet.Builder! |
Builder The object that constructs the AnimatorSet based on the dependencies outlined in the calls to play and the other methods in the Builder |
playSequentially
fun playSequentially(vararg items: Animator!): Unit
Sets up this AnimatorSet to play each of the supplied animations when the previous animation ends.
| Parameters | |
|---|---|
items |
Animator!: The animations that will be started one after another. |
playSequentially
fun playSequentially(items: MutableList<Animator!>!): Unit
Sets up this AnimatorSet to play each of the supplied animations when the previous animation ends.
| Parameters | |
|---|---|
items |
MutableList<Animator!>!: The animations that will be started one after another. |
playTogether
fun playTogether(vararg items: Animator!): Unit
Sets up this AnimatorSet to play all of the supplied animations at the same time. This is equivalent to calling play(android.animation.Animator) with the first animator in the set and then Builder#with(Animator) with each of the other animators. Note that an Animator with a startDelay will not actually start until that delay elapses, which means that if the first animator in the list supplied to this constructor has a startDelay, none of the other animators will start until that first animator's startDelay has elapsed.
| Parameters | |
|---|---|
items |
Animator!: The animations that will be started simultaneously. |
playTogether
fun playTogether(items: MutableCollection<Animator!>!): Unit
Sets up this AnimatorSet to play all of the supplied animations at the same time.
| Parameters | |
|---|---|
items |
MutableCollection<Animator!>!: The animations that will be started simultaneously. |
reverse
fun reverse(): Unit
Plays the AnimatorSet in reverse. If the animation has been seeked to a specific play time using setCurrentPlayTime(long), it will play backwards from the point seeked when reverse was called. Otherwise, then it will start from the end and play backwards. This behavior is only set for the current animation; future playing of the animation will use the default behavior of playing forward.
Note: reverse is not supported for infinite AnimatorSet.
setCurrentPlayTime
fun setCurrentPlayTime(playTime: Long): Unit
Sets the position of the animation to the specified point in time. This time should be between 0 and the total duration of the animation, including any repetition. If the animation has not yet been started, then it will not advance forward after it is set to this time; it will simply set the time to this value and perform any appropriate actions based on that time. If the animation is already running, then setCurrentPlayTime() will set the current playing time to this value and continue playing from that point. On Build.VERSION_CODES#UPSIDE_DOWN_CAKE and above, an AnimatorSet that hasn't been start()ed, will issue android.animation.Animator.AnimatorListener#onAnimationStart(Animator, boolean) and android.animation.Animator.AnimatorListener#onAnimationEnd(Animator, boolean) events.
| Parameters | |
|---|---|
playTime |
Long: The time, in milliseconds, to which the animation is advanced or rewound. Unless the animation is reversing, the playtime is considered the time since the end of the start delay of the AnimatorSet in a forward playing direction. |
setDuration
fun setDuration(duration: Long): AnimatorSet!
Sets the length of each of the current child animations of this AnimatorSet. By default, each child animation will use its own duration. If the duration is set on the AnimatorSet, then each child animation inherits this duration.
| Parameters | |
|---|---|
duration |
Long: The length of the animation, in milliseconds, of each of the child animations of this AnimatorSet. |
setInterpolator
fun setInterpolator(interpolator: TimeInterpolator!): Unit
Sets the TimeInterpolator for all current child animations of this AnimatorSet. The default value is null, which means that no interpolator is set on this AnimatorSet. Setting the interpolator to any non-null value will cause that interpolator to be set on the child animations when the set is started.
| Parameters | |
|---|---|
value |
the interpolator to be used by this animation |
interpolator |
TimeInterpolator!: the interpolator to be used by each child animation of this AnimatorSet |
setStartDelay
fun setStartDelay(startDelay: Long): Unit
The amount of time, in milliseconds, to delay starting the animation after start() is called. Note that the start delay should always be non-negative. Any negative start delay will be clamped to 0 on N and above.
| Parameters | |
|---|---|
startDelay |
Long: The amount of the delay, in milliseconds |
setTarget
fun setTarget(target: Any?): Unit
Sets the target object for all current child animations of this AnimatorSet that take targets (ObjectAnimator and AnimatorSet).
| Parameters | |
|---|---|
target |
Any?: The object being animated |
start
fun start(): Unit
Starts this animation. If the animation has a nonzero startDelay, the animation will start running after that delay elapses. A non-delayed animation will have its initial value(s) set immediately, followed by calls to AnimatorListener#onAnimationStart(Animator) for any listeners of this animator.
The animation started by calling this method will be run on the thread that called this method. This thread should have a Looper on it (a runtime exception will be thrown if this is not the case). Also, if the animation will animate properties of objects in the view hierarchy, then the calling thread should be the UI thread for that view hierarchy.
Starting this AnimatorSet will, in turn, start the animations for which it is responsible. The details of when exactly those animations are started depends on the dependency relationships that have been set up between the animations. Note: Manipulating AnimatorSet's lifecycle in the child animators' listener callbacks will lead to undefined behaviors. Also, AnimatorSet will ignore any seeking in the child animators once start() is called.
toString
fun toString(): String
| Return | |
|---|---|
String |
a string representation of the object. |