# ChangeTransform

Artifact: [androidx.transition:transition](https://developer.android.com/jetpack/androidx/releases/transition) [View Source](https://cs.android.com/search?q=file:androidx/transition/ChangeTransform.java+class:androidx.transition.ChangeTransform) Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

*** ** * ** ***

<br />

```
public class ChangeTransform extends Transition
```

<br />

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object.html) |||
| ↳ | [androidx.transition.Transition](https://developer.android.com/reference/androidx/transition/Transition) ||
|   | ↳ | [androidx.transition.ChangeTransform](https://developer.android.com/reference/androidx/transition/ChangeTransform) |

*** ** * ** ***

This Transition captures scale and rotation for Views before and after the scene change and animates those changes during the transition. A change in parent is handled as well by capturing the transforms from the parent before and after the scene change and animating those during the transition.

## Summary

| ### Public constructors |
|---|
| `https://developer.android.com/reference/androidx/transition/ChangeTransform#ChangeTransform()()` |
| `https://developer.android.com/reference/androidx/transition/ChangeTransform#ChangeTransform(android.content.Context,android.util.AttributeSet)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/content/Context.html context, @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/util/AttributeSet.html attrs)` |

| ### Public methods |
|---|---|
| `void` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#captureEndValues(androidx.transition.TransitionValues)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/TransitionValues transitionValues)` Captures the values in the end scene for the properties that this transition monitors. |
| `void` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#captureStartValues(androidx.transition.TransitionValues)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/TransitionValues transitionValues)` Captures the values in the start scene for the properties that this transition monitors. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/animation/Animator.html` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)( @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html sceneRoot, @https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues startValues, @https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues endValues )` This method creates an animation that will be run for this transition given the information in the startValues and endValues structures captured earlier for the start and end scenes. |
| `boolean` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#getReparent()()` Returns whether parent changes will be tracked by the ChangeTransform. |
| `boolean` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#getReparentWithOverlay()()` Returns whether changes to parent should use an overlay or not. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html String[]` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#getTransitionProperties()()` Returns the set of property names used stored in the `https://developer.android.com/reference/androidx/transition/TransitionValues` object passed into `https://developer.android.com/reference/androidx/transition/Transition#captureStartValues(androidx.transition.TransitionValues)` that this transition cares about for the purposes of canceling overlapping animations. |
| `void` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#setReparent(boolean)(boolean reparent)` Sets whether parent changes will be tracked by the ChangeTransform. |
| `void` | `https://developer.android.com/reference/androidx/transition/ChangeTransform#setReparentWithOverlay(boolean)(boolean reparentWithOverlay)` Sets whether changes to parent should use an overlay or not. |

### Inherited Constants

From [androidx.transition.Transition](https://developer.android.com/reference/androidx/transition/Transition) `static final int` `https://developer.android.com/reference/androidx/transition/Transition#MATCH_ID() = 3`

With `https://developer.android.com/reference/androidx/transition/Transition#setMatchOrder(int...)`, chooses to match by `https://developer.android.com/reference/android/view/View.html#getId()`.
`static final int` `https://developer.android.com/reference/androidx/transition/Transition#MATCH_INSTANCE() = 1`

With `https://developer.android.com/reference/androidx/transition/Transition#setMatchOrder(int...)`, chooses to match by View instance.
`static final int` `https://developer.android.com/reference/androidx/transition/Transition#MATCH_ITEM_ID() = 4`

With `https://developer.android.com/reference/androidx/transition/Transition#setMatchOrder(int...)`, chooses to match by the `https://developer.android.com/reference/android/widget/Adapter.html` item id.
`static final int` `https://developer.android.com/reference/androidx/transition/Transition#MATCH_NAME() = 2`

With `https://developer.android.com/reference/androidx/transition/Transition#setMatchOrder(int...)`, chooses to match by `https://developer.android.com/reference/android/view/View.html#getTransitionName()`.

### Inherited methods

From [androidx.transition.Transition](https://developer.android.com/reference/androidx/transition/Transition) `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#addListener(androidx.transition.Transition.TransitionListener)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition.TransitionListener 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.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#addTarget(int)(@https://developer.android.com/reference/androidx/annotation/IdRes int targetId)`

Adds the id of a target view that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#addTarget(java.lang.String)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/String.html targetName)`

Adds the transitionName of a target view that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#addTarget(java.lang.Class<?>)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Class.html<@https://developer.android.com/reference/androidx/annotation/NonNull ?> targetType)`

Adds the Class of a target view that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#addTarget(android.view.View)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html target)`

Sets the target view instances that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#clone()()` `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeChildren(int,boolean)(@https://developer.android.com/reference/androidx/annotation/IdRes int targetId, boolean exclude)`

Whether to add the children of the given id to the list of targets to exclude from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeChildren(android.view.View,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html target, boolean exclude)`

Whether to add the children of given target to the list of target children to exclude from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeChildren(java.lang.Class<?>,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Class.html<@https://developer.android.com/reference/androidx/annotation/NonNull ?> type, boolean exclude)`

Whether to add the given type to the list of types whose children should be excluded from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeTarget(int,boolean)(@https://developer.android.com/reference/androidx/annotation/IdRes int targetId, boolean exclude)`

Whether to add the given id to the list of target ids to exclude from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeTarget(java.lang.String,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/String.html targetName, boolean exclude)`

Whether to add the given transitionName to the list of target transitionNames to exclude from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeTarget(android.view.View,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html target, boolean exclude)`

Whether to add the given target to the list of targets to exclude from this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#excludeTarget(java.lang.Class<?>,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Class.html<@https://developer.android.com/reference/androidx/annotation/NonNull ?> type, boolean exclude)`

Whether to add the given type to the list of types to exclude from this transition.
`long` `https://developer.android.com/reference/androidx/transition/Transition#getDuration()()`

Returns the duration set on this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/graphics/Rect.html` `https://developer.android.com/reference/androidx/transition/Transition#getEpicenter()()`

Returns the epicenter as specified by the `https://developer.android.com/reference/android/transition/Transition.EpicenterCallback.html` or null if no callback exists.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/Transition.EpicenterCallback` `https://developer.android.com/reference/androidx/transition/Transition#getEpicenterCallback()()`

Returns the callback used to find the epicenter of the Transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/animation/TimeInterpolator.html` `https://developer.android.com/reference/androidx/transition/Transition#getInterpolator()()`

Returns the interpolator set on this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/String.html` `https://developer.android.com/reference/androidx/transition/Transition#getName()()`

Returns the name of this Transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/PathMotion` `https://developer.android.com/reference/androidx/transition/Transition#getPathMotion()()`

Returns the algorithm object used to interpolate along two dimensions.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionPropagation` `https://developer.android.com/reference/androidx/transition/Transition#getPropagation()()`

Returns the `https://developer.android.com/reference/android/transition/TransitionPropagation.html` used to calculate Animator start delays.
`final @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#getRootTransition()()`

If this Transition is not part of a TransitionSet, this is returned.
`long` `https://developer.android.com/reference/androidx/transition/Transition#getStartDelay()()`

Returns the startDelay set on this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/util/List.html<https://developer.android.com/reference/java/lang/Integer.html>` `https://developer.android.com/reference/androidx/transition/Transition#getTargetIds()()`

Returns the array of target IDs that this transition limits itself to tracking and animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/java/util/List.html<https://developer.android.com/reference/java/lang/String.html>` `https://developer.android.com/reference/androidx/transition/Transition#getTargetNames()()`

Returns the list of target transitionNames that this transition limits itself to tracking and animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/java/util/List.html<https://developer.android.com/reference/java/lang/Class.html<@https://developer.android.com/reference/androidx/annotation/NonNull ?>>` `https://developer.android.com/reference/androidx/transition/Transition#getTargetTypes()()`

Returns the list of target transitionNames that this transition limits itself to tracking and animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/util/List.html<https://developer.android.com/reference/android/view/View.html>` `https://developer.android.com/reference/androidx/transition/Transition#getTargets()()`

Returns the array of target views that this transition limits itself to tracking and animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues` `https://developer.android.com/reference/androidx/transition/Transition#getTransitionValues(android.view.View,boolean)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html view, boolean start)`

This method can be called by transitions to get the TransitionValues for any particular view during the transition-playing process.
`boolean` `https://developer.android.com/reference/androidx/transition/Transition#isSeekingSupported()()`

Returns `true` if the Transition can be used by `https://developer.android.com/reference/androidx/transition/TransitionManager#controlDelayedTransition(android.view.ViewGroup,androidx.transition.Transition)`.
`boolean` `https://developer.android.com/reference/androidx/transition/Transition#isTransitionRequired(androidx.transition.TransitionValues,androidx.transition.TransitionValues)(

@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues startValues,

@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues endValues

)`

Returns whether or not the transition should create an Animator, based on the values captured during `https://developer.android.com/reference/androidx/transition/Transition#captureStartValues(androidx.transition.TransitionValues)` and `https://developer.android.com/reference/androidx/transition/Transition#captureEndValues(androidx.transition.TransitionValues)`.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#removeListener(androidx.transition.Transition.TransitionListener)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition.TransitionListener listener)`

Removes a listener from the set listening to this animation.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#removeTarget(java.lang.Class<?>)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Class.html<@https://developer.android.com/reference/androidx/annotation/NonNull ?> target)`

Removes the given target from the list of targets that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#removeTarget(int)(@https://developer.android.com/reference/androidx/annotation/IdRes int targetId)`

Removes the given targetId from the list of ids that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#removeTarget(java.lang.String)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/String.html targetName)`

Removes the given targetName from the list of transitionNames that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#removeTarget(android.view.View)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html target)`

Removes the given target from the list of targets that this Transition is interested in animating.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#setDuration(long)(long duration)`

Sets the duration of this transition.
`void` `https://developer.android.com/reference/androidx/transition/Transition#setEpicenterCallback(androidx.transition.Transition.EpicenterCallback)(

@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/Transition.EpicenterCallback epicenterCallback

)`

Sets the callback to use to find the epicenter of a Transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#setInterpolator(android.animation.TimeInterpolator)(@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/animation/TimeInterpolator.html interpolator)`

Sets the interpolator of this transition.
`void` `https://developer.android.com/reference/androidx/transition/Transition#setMatchOrder(int...)(@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html int[] matches)`

Sets the order in which Transition matches View start and end values.
`void` `https://developer.android.com/reference/androidx/transition/Transition#setPathMotion(androidx.transition.PathMotion)(@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/PathMotion pathMotion)`

Sets the algorithm used to calculate two-dimensional interpolation.
`void` `https://developer.android.com/reference/androidx/transition/Transition#setPropagation(androidx.transition.TransitionPropagation)(@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionPropagation transitionPropagation)`

Sets the method for determining Animator start delays.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/Transition` `https://developer.android.com/reference/androidx/transition/Transition#setStartDelay(long)(long startDelay)`

Sets the startDelay of this transition.
`@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/String.html` `https://developer.android.com/reference/androidx/transition/Transition#toString()()`

## Public constructors

### ChangeTransform

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public ChangeTransform()
```

### ChangeTransform

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public ChangeTransform(@NonNull Context context, @NonNull AttributeSet attrs)
```

## Public methods

### captureEndValues

```
public void captureEndValues(@NonNull TransitionValues transitionValues)
```

Captures the values in the end scene for the properties that this transition monitors. These values are then passed as the endValues structure in a later call to `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)`. The main concern for an implementation is what the properties are that the transition cares about and what the values are for all of those properties. The start and end values will be compared later during the `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)` method to determine what, if any, animations, should be run.

Subclasses must implement this method. The method should only be called by the transition system; it is not intended to be called from external classes.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/TransitionValues transitionValues` | The holder for any values that the Transition wishes to store. Values are stored in the `values` field of this TransitionValues object and are keyed from a String value. For example, to store a view's rotation value, a transition might call `transitionValues.values.put("appname:transitionname:rotation", view.getRotation())`. The target view will already be stored in the transitionValues structure when this method is called. |

| See also |
|---|---|
| `https://developer.android.com/reference/androidx/transition/Transition#captureStartValues(androidx.transition.TransitionValues)` |   |
| `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)` |   |

### captureStartValues

```
public void captureStartValues(@NonNull TransitionValues transitionValues)
```

Captures the values in the start scene for the properties that this transition monitors. These values are then passed as the startValues structure in a later call to `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)`. The main concern for an implementation is what the properties are that the transition cares about and what the values are for all of those properties. The start and end values will be compared later during the `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)` method to determine what, if any, animations, should be run.

Subclasses must implement this method. The method should only be called by the transition system; it is not intended to be called from external classes.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/transition/TransitionValues transitionValues` | The holder for any values that the Transition wishes to store. Values are stored in the `values` field of this TransitionValues object and are keyed from a String value. For example, to store a view's rotation value, a transition might call `transitionValues.values.put("appname:transitionname:rotation", view.getRotation())`. The target view will already be stored in the transitionValues structure when this method is called. |

| See also |
|---|---|
| `https://developer.android.com/reference/androidx/transition/Transition#captureEndValues(androidx.transition.TransitionValues)` |   |
| `https://developer.android.com/reference/androidx/transition/Transition#createAnimator(android.view.ViewGroup,androidx.transition.TransitionValues,androidx.transition.TransitionValues)` |   |

### createAnimator

```
public @Nullable Animator createAnimator(
    @NonNull ViewGroup sceneRoot,
    @Nullable TransitionValues startValues,
    @Nullable TransitionValues endValues
)
```

This method creates an animation that will be run for this transition given the information in the startValues and endValues structures captured earlier for the start and end scenes. Subclasses of Transition should override this method. The method should only be called by the transition system; it is not intended to be called from external classes.

This method is called by the transition's parent (all the way up to the topmost Transition in the hierarchy) with the sceneRoot and start/end values that the transition may need to set up initial target values and construct an appropriate animation. For example, if an overall Transition is a `https://developer.android.com/reference/androidx/transition/TransitionSet` consisting of several child transitions in sequence, then some of the child transitions may want to set initial values on target views prior to the overall Transition commencing, to put them in an appropriate state for the delay between that start and the child Transition start time. For example, a transition that fades an item in may wish to set the starting alpha value to 0, to avoid it blinking in prior to the transition actually starting the animation. This is necessary because the scene change that triggers the Transition will automatically set the end-scene on all target views, so a Transition that wants to animate from a different value should set that value prior to returning from this method.

Additionally, a Transition can perform logic to determine whether the transition needs to run on the given target and start/end values. For example, a transition that resizes objects on the screen may wish to avoid running for views which are not present in either the start or end scenes.

If there is an animator created and returned from this method, the transition mechanism will apply any applicable duration, startDelay, and interpolator to that animation and start it. A return value of `null` indicates that no animation should run. The default implementation returns null.

The method is called for every applicable target object, which is stored in the `https://developer.android.com/reference/androidx/transition/TransitionValues#view()` field.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html sceneRoot` | The root of the transition hierarchy. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues startValues` | The values for a specific target in the start scene. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/androidx/transition/TransitionValues endValues` | The values for the target in the end scene. |

| Returns |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/animation/Animator.html` | A Animator to be started at the appropriate time in the overall transition for this scene change. A null value means no animation should be run. |

### getReparent

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public boolean getReparent()
```

Returns whether parent changes will be tracked by the ChangeTransform. If parent changes are tracked, then the transform will adjust to the transforms of the different parents. If they aren't tracked, only the transforms of the transitioning view will be tracked. Default is true.

| Returns |
|---|---|
| `boolean` | whether parent changes will be tracked by the ChangeTransform. |

### getReparentWithOverlay

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public boolean getReparentWithOverlay()
```

Returns whether changes to parent should use an overlay or not. When the parent change doesn't use an overlay, it affects the transforms of the child. The default value is `true`.

Note: when Overlays are not used when a parent changes, a view can be clipped when it moves outside the bounds of its parent. Setting `https://developer.android.com/reference/android/view/ViewGroup.html#setClipChildren(boolean)` and `https://developer.android.com/reference/android/view/ViewGroup.html#setClipToPadding(boolean)` can help. Also, when Overlays are not used and the parent is animating its location, the position of the child view will be relative to its parent's final position, so it may appear to "jump" at the beginning.

| Returns |
|---|---|
| `boolean` | `true` when a changed parent should execute the transition inside the scene root's overlay or `false` if a parent change only affects the transform of the transitioning view. |

### getTransitionProperties

```
public @NonNull String[] getTransitionProperties()
```

Returns the set of property names used stored in the `https://developer.android.com/reference/androidx/transition/TransitionValues` object passed into `https://developer.android.com/reference/androidx/transition/Transition#captureStartValues(androidx.transition.TransitionValues)` that this transition cares about for the purposes of canceling overlapping animations. When any transition is started on a given scene root, all transitions currently running on that same scene root are checked to see whether the properties on which they based their animations agree with the end values of the same properties in the new transition. If the end values are not equal, then the old animation is canceled since the new transition will start a new animation to these new values. If the values are equal, the old animation is allowed to continue and no new animation is started for that transition.

A transition does not need to override this method. However, not doing so will mean that the cancellation logic outlined in the previous paragraph will be skipped for that transition, possibly leading to artifacts as old transitions and new transitions on the same targets run in parallel, animating views toward potentially different end values.

| Returns |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html String[]` | An array of property names as described in the class documentation for `https://developer.android.com/reference/androidx/transition/TransitionValues`. The default implementation returns `null`. |

### setReparent

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public void setReparent(boolean reparent)
```

Sets whether parent changes will be tracked by the ChangeTransform. If parent changes are tracked, then the transform will adjust to the transforms of the different parents. If they aren't tracked, only the transforms of the transitioning view will be tracked. Default is true.

| Parameters |
|---|---|
| `boolean reparent` | Set to true to track parent changes or false to only track changes of the transitioning view without considering the parent change. |

### setReparentWithOverlay

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/transition#1.0.0)

```
public void setReparentWithOverlay(boolean reparentWithOverlay)
```

Sets whether changes to parent should use an overlay or not. When the parent change doesn't use an overlay, it affects the transforms of the child. The default value is `true`.

Note: when Overlays are not used when a parent changes, a view can be clipped when it moves outside the bounds of its parent. Setting `https://developer.android.com/reference/android/view/ViewGroup.html#setClipChildren(boolean)` and `https://developer.android.com/reference/android/view/ViewGroup.html#setClipToPadding(boolean)` can help. Also, when Overlays are not used and the parent is animating its location, the position of the child view will be relative to its parent's final position, so it may appear to "jump" at the beginning.

| Parameters |
|---|---|
| `boolean reparentWithOverlay` | `true` when a changed parent should execute the transition inside the scene root's overlay or `false`if a parent change only affects the transform of the transitioning view. |