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StateListAnimator

public class StateListAnimator
extends Object implements Cloneable

java.lang.Object
   ↳ android.animation.StateListAnimator


Lets you define a number of Animators that will run on the attached View depending on the View's drawable state.

It can be defined in an XML file with the <selector> element. Each State Animator is defined in a nested <item> element.

Summary

XML attributes

android:animation Animation to use on each child. 
android:state_activated State value for StateListDrawable, set when a view or its parent has been "activated" meaning the user has currently marked it as being of interest. 
android:state_active State value for StateListDrawable, set when a view or drawable is considered "active" by its host. 
android:state_checkable State identifier indicating that the object may display a check mark. 
android:state_checked State identifier indicating that the object is currently checked. 
android:state_enabled State value for StateListDrawable, set when a view is enabled. 
android:state_first State value for StateListDrawable, set when a view or drawable is in the first position in an ordered set. 
android:state_focused State value for StateListDrawable, set when a view has input focus. 
android:state_last State value for StateListDrawable, set when a view or drawable is in the last position in an ordered set. 
android:state_middle State value for StateListDrawable, set when a view or drawable is in the middle position in an ordered set. 
android:state_pressed State value for StateListDrawable, set when the user is pressing down in a view. 
android:state_selected State value for StateListDrawable, set when a view (or one of its parents) is currently selected. 
android:state_single State value for StateListDrawable, set when a view or drawable is considered "single" by its host. 
android:state_window_focused State value for StateListDrawable, set when a view's window has input focus. 

Public constructors

StateListAnimator()

Public methods

void addState(int[] specs, Animator animator)

Associates the given animator with the provided drawable state specs so that it will be run when the View's drawable state matches the specs.

StateListAnimator clone()

Creates and returns a copy of this object.

void jumpToCurrentState()

If there is an animation running for a recent state change, ends it.

Inherited methods

From class java.lang.Object

XML attributes

android:animation

Animation to use on each child.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

android:state_activated

State value for StateListDrawable, set when a view or its parent has been "activated" meaning the user has currently marked it as being of interest. This is an alternative representation of state_checked for when the state should be propagated down the view hierarchy.

May be a boolean value, such as "true" or "false".

android:state_active

State value for StateListDrawable, set when a view or drawable is considered "active" by its host. Actual usage may vary between views. Consult the host view documentation for details.

May be a boolean value, such as "true" or "false".

android:state_checkable

State identifier indicating that the object may display a check mark. See state_checked for the identifier that indicates whether it is actually checked.

May be a boolean value, such as "true" or "false".

android:state_checked

State identifier indicating that the object is currently checked. See state_checkable for an additional identifier that can indicate if any object may ever display a check, regardless of whether state_checked is currently set.

May be a boolean value, such as "true" or "false".

android:state_enabled

State value for StateListDrawable, set when a view is enabled.

May be a boolean value, such as "true" or "false".

android:state_first

State value for StateListDrawable, set when a view or drawable is in the first position in an ordered set. Actual usage may vary between views. Consult the host view documentation for details.

May be a boolean value, such as "true" or "false".

android:state_focused

State value for StateListDrawable, set when a view has input focus.

May be a boolean value, such as "true" or "false".

android:state_last

State value for StateListDrawable, set when a view or drawable is in the last position in an ordered set. Actual usage may vary between views. Consult the host view documentation for details.

May be a boolean value, such as "true" or "false".

android:state_middle

State value for StateListDrawable, set when a view or drawable is in the middle position in an ordered set. Actual usage may vary between views. Consult the host view documentation for details.

May be a boolean value, such as "true" or "false".

android:state_pressed

State value for StateListDrawable, set when the user is pressing down in a view.

May be a boolean value, such as "true" or "false".

android:state_selected

State value for StateListDrawable, set when a view (or one of its parents) is currently selected.

May be a boolean value, such as "true" or "false".

android:state_single

State value for StateListDrawable, set when a view or drawable is considered "single" by its host. Actual usage may vary between views. Consult the host view documentation for details.

May be a boolean value, such as "true" or "false".

android:state_window_focused

State value for StateListDrawable, set when a view's window has input focus.

May be a boolean value, such as "true" or "false".

Public constructors

StateListAnimator

added in API level 21
StateListAnimator ()

Public methods

addState

added in API level 21
void addState (int[] specs, 
                Animator animator)

Associates the given animator with the provided drawable state specs so that it will be run when the View's drawable state matches the specs.

Parameters
specs int: The drawable state specs to match against
animator Animator: The animator to run when the specs match

clone

added in API level 21
StateListAnimator clone ()

Creates and returns a copy of this object. The precise meaning of "copy" may depend on the class of the object. The general intent is that, for any object x, the expression:

 x.clone() != x
will be true, and that the expression:
 x.clone().getClass() == x.getClass()
will be true, but these are not absolute requirements. While it is typically the case that:
 x.clone().equals(x)
will be true, this is not an absolute requirement.

By convention, the returned object should be obtained by calling super.clone. If a class and all of its superclasses (except Object) obey this convention, it will be the case that x.clone().getClass() == x.getClass().

By convention, the object returned by this method should be independent of this object (which is being cloned). To achieve this independence, it may be necessary to modify one or more fields of the object returned by super.clone before returning it. Typically, this means copying any mutable objects that comprise the internal "deep structure" of the object being cloned and replacing the references to these objects with references to the copies. If a class contains only primitive fields or references to immutable objects, then it is usually the case that no fields in the object returned by super.clone need to be modified.

The method clone for class Object performs a specific cloning operation. First, if the class of this object does not implement the interface Cloneable, then a CloneNotSupportedException is thrown. Note that all arrays are considered to implement the interface Cloneable and that the return type of the clone method of an array type T[] is T[] where T is any reference or primitive type. Otherwise, this method creates a new instance of the class of this object and initializes all its fields with exactly the contents of the corresponding fields of this object, as if by assignment; the contents of the fields are not themselves cloned. Thus, this method performs a "shallow copy" of this object, not a "deep copy" operation.

The class Object does not itself implement the interface Cloneable, so calling the clone method on an object whose class is Object will result in throwing an exception at run time.

Returns
StateListAnimator a clone of this instance.

jumpToCurrentState

added in API level 21
void jumpToCurrentState ()

If there is an animation running for a recent state change, ends it.

This causes the animation to assign the end value(s) to the View.

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