added in version 25.1.0
belongs to Maven artifact com.android.support:transition:28.0.0-alpha1

Visibility

public abstract class Visibility
extends Transition

java.lang.Object
↳	android.support.transition.Transition
	↳	android.support.transition.Visibility

Known Direct Subclasses

Explode,Fade,Slide

This transition tracks changes to the visibility of target views in the start and end scenes. Visibility is determined not just by the setVisibility(int) state of views, but also whether views exist in the current view hierarchy. The class is intended to be a utility for subclasses such as Fade, which use this visibility information to determine the specific animations to run when visibility changes occur. Subclasses should implement one or both of the methods onAppear(ViewGroup, TransitionValues, int, TransitionValues, int), onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int) or onAppear(ViewGroup, View, TransitionValues, TransitionValues), onDisappear(ViewGroup, View, TransitionValues, TransitionValues).

Summary

Constants
`int`	`MODE_IN` Mode used in `setMode(int)` to make the transition operate on targets that are appearing.
`int`	`MODE_OUT` Mode used in `setMode(int)` to make the transition operate on targets that are disappearing.

Inherited constants

From class


    android.support.transition.Transition

Public constructors
`Visibility()`
`Visibility(Context context, AttributeSet attrs)`

Public methods
`void`	`captureEndValues(TransitionValues transitionValues)` Captures the values in the end scene for the properties that this transition monitors.
`void`	`captureStartValues(TransitionValues transitionValues)` Captures the values in the start scene for the properties that this transition monitors.
`Animator`	`createAnimator(ViewGroup sceneRoot, TransitionValues startValues, 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.
`int`	`getMode()` Returns whether appearing and/or disappearing Views are supported.
`String[]`	`getTransitionProperties()` Returns the set of property names used stored in the `TransitionValues` object passed into `captureStartValues(TransitionValues)` that this transition cares about for the purposes of canceling overlapping animations.
`boolean`	`isTransitionRequired(TransitionValues startValues, TransitionValues newValues)` Returns whether or not the transition should create an Animator, based on the values captured during `captureStartValues(TransitionValues)` and `captureEndValues(TransitionValues)`.
`boolean`	`isVisible(TransitionValues values)` Returns whether the view is 'visible' according to the given values object.
`Animator`	`onAppear(ViewGroup sceneRoot, TransitionValues startValues, int startVisibility, TransitionValues endValues, int endVisibility)` The default implementation of this method does nothing.
`Animator`	`onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues)` The default implementation of this method returns a null Animator.
`Animator`	`onDisappear(ViewGroup sceneRoot, TransitionValues startValues, int startVisibility, TransitionValues endValues, int endVisibility)` The default implementation of this method does nothing.
`Animator`	`onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues)` The default implementation of this method returns a null Animator.
`void`	`setMode(int mode)` Changes the transition to support appearing and/or disappearing Views, depending on `mode`.

Inherited methods

From class


  
    android.support.transition.Transition

`Transition`	`addListener(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.
`Transition`	`addTarget(View target)` Sets the target view instances that this Transition is interested in animating.
`Transition`	`addTarget(int targetId)` Adds the id of a target view that this Transition is interested in animating.
`Transition`	`addTarget(Class targetType)` Adds the Class of a target view that this Transition is interested in animating.
`Transition`	`addTarget(String targetName)` Adds the transitionName of a target view that this Transition is interested in animating.
`abstract void`	`captureEndValues(TransitionValues transitionValues)` Captures the values in the end scene for the properties that this transition monitors.
`abstract void`	`captureStartValues(TransitionValues transitionValues)` Captures the values in the start scene for the properties that this transition monitors.
`Transition`	`clone()`
`Animator`	`createAnimator(ViewGroup sceneRoot, TransitionValues startValues, 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.
`Transition`	`excludeChildren(int targetId, boolean exclude)` Whether to add the children of the given id to the list of targets to exclude from this transition.
`Transition`	`excludeChildren(Class type, boolean exclude)` Whether to add the given type to the list of types whose children should be excluded from this transition.
`Transition`	`excludeChildren(View target, boolean exclude)` Whether to add the children of given target to the list of target children to exclude from this transition.
`Transition`	`excludeTarget(View target, boolean exclude)` Whether to add the given target to the list of targets to exclude from this transition.
`Transition`	`excludeTarget(Class type, boolean exclude)` Whether to add the given type to the list of types to exclude from this transition.
`Transition`	`excludeTarget(String targetName, boolean exclude)` Whether to add the given transitionName to the list of target transitionNames to exclude from this transition.
`Transition`	`excludeTarget(int targetId, boolean exclude)` Whether to add the given id to the list of target ids to exclude from this transition.
`long`	`getDuration()` Returns the duration set on this transition.
`Rect`	`getEpicenter()` Returns the epicenter as specified by the `Transition.EpicenterCallback` or null if no callback exists.
`Transition.EpicenterCallback`	`getEpicenterCallback()` Returns the callback used to find the epicenter of the Transition.
`TimeInterpolator`	`getInterpolator()` Returns the interpolator set on this transition.
`String`	`getName()` Returns the name of this Transition.
`PathMotion`	`getPathMotion()` Returns the algorithm object used to interpolate along two dimensions.
`TransitionPropagation`	`getPropagation()` Returns the `TransitionPropagation` used to calculate Animator start delays.
`long`	`getStartDelay()` Returns the startDelay set on this transition.
`List<Integer>`	`getTargetIds()` Returns the array of target IDs that this transition limits itself to tracking and animating.
`List<String>`	`getTargetNames()` Returns the list of target transitionNames that this transition limits itself to tracking and animating.
`List<Class>`	`getTargetTypes()` Returns the list of target transitionNames that this transition limits itself to tracking and animating.
`List<View>`	`getTargets()` Returns the array of target views that this transition limits itself to tracking and animating.
`String[]`	`getTransitionProperties()` Returns the set of property names used stored in the `TransitionValues` object passed into `captureStartValues(TransitionValues)` that this transition cares about for the purposes of canceling overlapping animations.
`TransitionValues`	`getTransitionValues(View view, boolean start)` This method can be called by transitions to get the TransitionValues for any particular view during the transition-playing process.
`boolean`	`isTransitionRequired(TransitionValues startValues, TransitionValues endValues)` Returns whether or not the transition should create an Animator, based on the values captured during `captureStartValues(TransitionValues)` and `captureEndValues(TransitionValues)`.
`Transition`	`removeListener(Transition.TransitionListener listener)` Removes a listener from the set listening to this animation.
`Transition`	`removeTarget(int targetId)` Removes the given targetId from the list of ids that this Transition is interested in animating.
`Transition`	`removeTarget(View target)` Removes the given target from the list of targets that this Transition is interested in animating.
`Transition`	`removeTarget(String targetName)` Removes the given targetName from the list of transitionNames that this Transition is interested in animating.
`Transition`	`removeTarget(Class target)` Removes the given target from the list of targets that this Transition is interested in animating.
`Transition`	`setDuration(long duration)` Sets the duration of this transition.
`void`	`setEpicenterCallback(Transition.EpicenterCallback epicenterCallback)` Sets the callback to use to find the epicenter of a Transition.
`Transition`	`setInterpolator(TimeInterpolator interpolator)` Sets the interpolator of this transition.
`void`	`setMatchOrder(int... matches)` Sets the order in which Transition matches View start and end values.
`void`	`setPathMotion(PathMotion pathMotion)` Sets the algorithm used to calculate two-dimensional interpolation.
`void`	`setPropagation(TransitionPropagation transitionPropagation)` Sets the method for determining Animator start delays.
`Transition`	`setStartDelay(long startDelay)` Sets the startDelay of this transition.
`String`	`toString()`

From class


  
    java.lang.Object

Constants

MODE_IN

added in version 26.1.0

int MODE_IN

Mode used in setMode(int) to make the transition operate on targets that are appearing. Maybe be combined with MODE_OUT to target Visibility changes both in and out.

Constant Value: 1 (0x00000001)

MODE_OUT

added in version 26.1.0

int MODE_OUT

Mode used in setMode(int) to make the transition operate on targets that are disappearing. Maybe be combined with MODE_IN to target Visibility changes both in and out.

Constant Value: 2 (0x00000002)

Public constructors

Visibility

added in version 25.1.0

Visibility ()

Visibility

added in version 26.1.0

Visibility (Context context, 
                AttributeSet attrs)

Parameters
`context`	`Context`
`attrs`	`AttributeSet`

Public methods

captureEndValues

added in version 25.1.0

void captureEndValues (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 createAnimator(ViewGroup, TransitionValues, 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 createAnimator(ViewGroup, TransitionValues, 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

Parameters
`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.

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.

captureStartValues

added in version 25.1.0

void captureStartValues (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 createAnimator(ViewGroup, TransitionValues, 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 createAnimator(ViewGroup, TransitionValues, 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

Parameters
`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.

transitionValues

transitionValues.values.put("appname:transitionname:rotation",
                         view.getRotation())

. The target view will already be stored in the transitionValues structure when this method is called.

createAnimator

added in version 25.1.0

Animator createAnimator (ViewGroup sceneRoot, 
                TransitionValues startValues, 
                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 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 view field.

Parameters
`sceneRoot`	`ViewGroup`: The root of the transition hierarchy.
`startValues`	`TransitionValues`: The values for a specific target in the start scene.
`endValues`	`TransitionValues`: The values for the target in the end scene.

Returns
`Animator`	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.

getMode

added in version 26.1.0

int getMode ()

Returns whether appearing and/or disappearing Views are supported.

Returns
`int`	whether appearing and/or disappearing Views are supported. A combination of `MODE_IN` and `MODE_OUT`.

getTransitionProperties

added in version 25.1.0

String[] getTransitionProperties ()

Returns the set of property names used stored in the TransitionValues object passed into captureStartValues(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
`String[]`	An array of property names as described in the class documentation for `TransitionValues`. The default implementation returns `null`.

isTransitionRequired

added in version 26.1.0

boolean isTransitionRequired (TransitionValues startValues, 
                TransitionValues newValues)

Returns whether or not the transition should create an Animator, based on the values captured during captureStartValues(TransitionValues) and captureEndValues(TransitionValues). The default implementation compares the property values returned from getTransitionProperties(), or all property values if getTransitionProperties() returns null. Subclasses may override this method to provide logic more specific to the transition implementation.

Parameters
`startValues`	`TransitionValues`: the values from captureStartValues, This may be `null` if the View did not exist in the start state.
`newValues`	`TransitionValues`: the values from captureEndValues. This may be `null` if the View did not exist in the end state.

Returns
`boolean`

isVisible

added in version 25.1.0

boolean isVisible (TransitionValues values)

Returns whether the view is 'visible' according to the given values object. This is determined by testing the same properties in the values object that are used to determine whether the object is appearing or disappearing in the createAnimator(ViewGroup, TransitionValues, TransitionValues) method. This method can be called by, for example, subclasses that want to know whether the object is visible in the same way that Visibility determines it for the actual animation.

Parameters
`values`	`TransitionValues`: The TransitionValues object that holds the information by which visibility is determined.

Returns
`boolean`	True if the view reference by `values` is visible, false otherwise.

onAppear

added in version 25.1.0

Animator onAppear (ViewGroup sceneRoot, 
                TransitionValues startValues, 
                int startVisibility, 
                TransitionValues endValues, 
                int endVisibility)

The default implementation of this method does nothing. Subclasses should override if they need to create an Animator when targets appear. The method should only be called by the Visibility class; it is not intended to be called from external classes.

Parameters
`sceneRoot`	`ViewGroup`: The root of the transition hierarchy
`startValues`	`TransitionValues`: The target values in the start scene
`startVisibility`	`int`: The target visibility in the start scene
`endValues`	`TransitionValues`: The target values in the end scene
`endVisibility`	`int`: The target visibility in the end scene

Returns
`Animator`	An 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.

onAppear

added in version 26.1.0

Animator onAppear (ViewGroup sceneRoot, 
                View view, 
                TransitionValues startValues, 
                TransitionValues endValues)

The default implementation of this method returns a null Animator. Subclasses should override this method to make targets appear with the desired transition. The method should only be called from onAppear(ViewGroup, TransitionValues, int, TransitionValues, int).

Parameters
`sceneRoot`	`ViewGroup`: The root of the transition hierarchy
`view`	`View`: The View to make appear. This will be in the target scene's View hierarchy and will be VISIBLE.
`startValues`	`TransitionValues`: The target values in the start scene
`endValues`	`TransitionValues`: The target values in the end scene

Returns
`Animator`	An 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.

onDisappear

added in version 25.1.0

Animator onDisappear (ViewGroup sceneRoot, 
                TransitionValues startValues, 
                int startVisibility, 
                TransitionValues endValues, 
                int endVisibility)

The default implementation of this method does nothing. Subclasses should override if they need to create an Animator when targets disappear. The method should only be called by the Visibility class; it is not intended to be called from external classes.

Parameters
`sceneRoot`	`ViewGroup`: The root of the transition hierarchy
`startValues`	`TransitionValues`: The target values in the start scene
`startVisibility`	`int`: The target visibility in the start scene
`endValues`	`TransitionValues`: The target values in the end scene
`endVisibility`	`int`: The target visibility in the end scene

Returns
`Animator`	An 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.

onDisappear

added in version 26.1.0

Animator onDisappear (ViewGroup sceneRoot, 
                View view, 
                TransitionValues startValues, 
                TransitionValues endValues)

The default implementation of this method returns a null Animator. Subclasses should override this method to make targets disappear with the desired transition. The method should only be called from onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int).

Parameters
`sceneRoot`	`ViewGroup`: The root of the transition hierarchy
`view`	`View`: The View to make disappear. This will be in the target scene's View hierarchy or in an `ViewGroupOverlay` and will be VISIBLE.
`startValues`	`TransitionValues`: The target values in the start scene
`endValues`	`TransitionValues`: The target values in the end scene

Returns
`Animator`	An 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.

setMode

added in version 26.1.0

void setMode (int mode)

Changes the transition to support appearing and/or disappearing Views, depending on mode.

Parameters
`mode`	`int`: The behavior supported by this transition, a combination of `MODE_IN` and `MODE_OUT`.

Interfaces
- Transition.TransitionListener
Classes

Visibility

Summary

Constants

Inherited constants

Public constructors

Public methods

Inherited methods

Constants

MODE_IN

MODE_OUT

Public constructors

Visibility

Visibility

Public methods

captureEndValues

captureStartValues

createAnimator

getMode

getTransitionProperties

isTransitionRequired

isVisible

onAppear

onAppear

onDisappear

onDisappear

setMode

Interfaces

Classes