public
abstract
class
TransitionPropagation
extends Object
| java.lang.Object | |
| ↳ | android.transition.TransitionPropagation |
 Known Direct Subclasses
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Known Indirect Subclasses
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Extend TransitionPropagation to customize start delays for Animators created
in createAnimator(ViewGroup, TransitionValues, TransitionValues). A Transition such as Explode
defaults to using CircularPropagation and Views closer to the
epicenter will move out of the scene later and into the scene sooner than Views farther
from the epicenter, giving the appearance of inertia. With no TransitionPropagation, all
Views will react simultaneously to the start of the transition.
Public constructors | |
|---|---|
TransitionPropagation()
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Public methods | |
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abstract
void
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captureValues(TransitionValues transitionValues)
Captures the values in the start or end scene for the properties that this transition propagation monitors. |
abstract
String[]
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getPropagationProperties()
Returns the set of property names stored in the |
abstract
long
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getStartDelay(ViewGroup sceneRoot, Transition transition, TransitionValues startValues, TransitionValues endValues)
Called by Transition to alter the Animator start delay. |
Inherited methods | |
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From
class
java.lang.Object
| |
void captureValues (TransitionValues transitionValues)
Captures the values in the start or end scene for the properties that this
transition propagation monitors. These values are then passed as the startValues
or endValues structure in a later call to
getStartDelay(ViewGroup, Transition, 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
getStartDelay(ViewGroup, Transition, TransitionValues, TransitionValues).
method to determine the start delay.
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 | |
|---|---|
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.
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String[] getPropagationProperties ()
Returns the set of property names stored in the TransitionValues
object passed into captureValues(TransitionValues) that
this transition propagation cares about for the purposes of preventing
duplicate capturing of property values.
A TransitionPropagation must override this method to prevent
duplicate capturing of values and must contain at least one
| Returns | |
|---|---|
String[] |
An array of property names as described in the class documentation for
TransitionValues.
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long getStartDelay (ViewGroup sceneRoot, Transition transition, TransitionValues startValues, TransitionValues endValues)
Called by Transition to alter the Animator start delay. All start delays will be adjusted such that the minimum becomes zero.
| Parameters | |
|---|---|
sceneRoot |
ViewGroup:
The root of the View hierarchy running the transition. |
transition |
Transition:
The transition that created the Animator |
startValues |
TransitionValues:
The values for a specific target in the start scene. |
endValues |
TransitionValues:
The values for the target in the end scene. |
| Returns | |
|---|---|
long |
A start delay to use with the Animator created by transition. The
delay will be offset by the minimum delay of all TransitionPropagations
used in the Transition so that the smallest delay will be 0. Returned values may be
negative.
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Developers