public class ChangeImageTransform extends Transition
In combination with ChangeBounds, ChangeImageTransform allows ImageViews
that change size, shape, or ImageView.ScaleType
to animate contents
smoothly.
Transition.AnimationInfo, Transition.EpicenterCallback, Transition.TransitionListener, Transition.TransitionListenerAdapter
MATCH_ID, MATCH_INSTANCE, MATCH_ITEM_ID, MATCH_NAME
Constructor and Description |
---|
ChangeImageTransform() |
ChangeImageTransform(Context context,
AttributeSet attrs) |
Modifier and Type | Method and Description |
---|---|
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)
Creates an Animator for ImageViews moving, changing dimensions, and/or changing
ImageView.ScaleType . |
String[] |
getTransitionProperties()
Returns the set of property names used stored in the
TransitionValues
object passed into Transition.captureStartValues(TransitionValues) that
this transition cares about for the purposes of canceling overlapping animations. |
addListener, addTarget, addTarget, addTarget, addTarget, animate, cancel, canRemoveViews, clone, createAnimators, end, excludeChildren, excludeChildren, excludeChildren, excludeTarget, excludeTarget, excludeTarget, excludeTarget, getDuration, getEpicenter, getEpicenterCallback, getInterpolator, getName, getNameOverrides, getPathMotion, getPropagation, getStartDelay, getTargetIds, getTargetNames, getTargets, getTargetTypes, getTargetViewNames, getTransitionValues, isTransitionRequired, pause, removeListener, removeTarget, removeTarget, removeTarget, removeTarget, resume, runAnimators, setDuration, setEpicenterCallback, setInterpolator, setMatchOrder, setNameOverrides, setPathMotion, setPropagation, setStartDelay, start, toString
public ChangeImageTransform()
public ChangeImageTransform(Context context, AttributeSet attrs)
public void captureStartValues(TransitionValues transitionValues)
Transition
Transition.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
Transition.createAnimator(android.view.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.
captureStartValues
in class Transition
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.Transition.captureEndValues(TransitionValues)
,
Transition.createAnimator(ViewGroup, TransitionValues, TransitionValues)
public void captureEndValues(TransitionValues transitionValues)
Transition
Transition.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
Transition.createAnimator(android.view.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.
captureEndValues
in class Transition
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.Transition.captureStartValues(TransitionValues)
,
Transition.createAnimator(ViewGroup, TransitionValues, TransitionValues)
public String[] getTransitionProperties()
Transition
TransitionValues
object passed into Transition.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.
getTransitionProperties
in class Transition
TransitionValues
. The default implementation returns null
.public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues, TransitionValues endValues)
ImageView.ScaleType
.createAnimator
in class Transition
sceneRoot
- The root of the transition hierarchy.startValues
- The values for a specific target in the start scene.endValues
- The values for the target in the end scene.