ExpandableBehavior
public
abstract
class
ExpandableBehavior
extends Behavior<View>
| java.lang.Object | ||
| ↳ | androidx.coordinatorlayout.widget.CoordinatorLayout.Behavior<android.view.View> | |
| ↳ | com.google.android.material.transformation.ExpandableBehavior | |
Known Direct Subclasses
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Known Indirect Subclasses
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Base Behavior for views that can react to an ExpandableWidget's setExpanded(boolean) state changes.
Summary
Public constructors | |
|---|---|
ExpandableBehavior()
|
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ExpandableBehavior(Context context, AttributeSet attrs)
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Public methods | |
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static
<T extends ExpandableBehavior>
T
|
from(View view, Class<T> klass)
A utility function to get the |
abstract
boolean
|
layoutDependsOn(CoordinatorLayout parent, View child, View dependency)
|
boolean
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onDependentViewChanged(CoordinatorLayout parent, View child, View dependency)
|
boolean
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onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection)
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Protected methods | |
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ExpandableWidget
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findExpandableWidget(CoordinatorLayout parent, View child)
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abstract
boolean
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onExpandedStateChange(View dependency, View child, boolean expanded, boolean animated)
Reacts to a change in expanded state. |
Inherited methods | |
|---|---|
From
class
androidx.coordinatorlayout.widget.CoordinatorLayout.Behavior
| |
From
class
java.lang.Object
| |
Public constructors
ExpandableBehavior
ExpandableBehavior ()
ExpandableBehavior
ExpandableBehavior (Context context,
AttributeSet attrs)
| Parameters | |
|---|---|
context |
Context |
attrs |
AttributeSet |
Public methods
from
T from (View view,
Class<T> klass)
A utility function to get the ExpandableBehavior attached to the view.
| Parameters | |
|---|---|
view |
View: The View that the ExpandableBehavior is attached to. |
klass |
Class: The expected Class of the attached ExpandableBehavior. |
| Returns | |
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T |
The ExpandableBehavior attached to the view.
|
layoutDependsOn
boolean layoutDependsOn (CoordinatorLayout parent,
View child,
View dependency)
| Parameters | |
|---|---|
parent |
CoordinatorLayout |
child |
View |
dependency |
View |
| Returns | |
|---|---|
boolean |
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onDependentViewChanged
boolean onDependentViewChanged (CoordinatorLayout parent,
View child,
View dependency)
| Parameters | |
|---|---|
parent |
CoordinatorLayout |
child |
View |
dependency |
View |
| Returns | |
|---|---|
boolean |
|
onLayoutChild
boolean onLayoutChild (CoordinatorLayout parent,
View child,
int layoutDirection)
| Parameters | |
|---|---|
parent |
CoordinatorLayout |
child |
View |
layoutDirection |
int |
| Returns | |
|---|---|
boolean |
|
Protected methods
findExpandableWidget
ExpandableWidget findExpandableWidget (CoordinatorLayout parent, View child)
| Parameters | |
|---|---|
parent |
CoordinatorLayout |
child |
View |
| Returns | |
|---|---|
ExpandableWidget |
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onExpandedStateChange
boolean onExpandedStateChange (View dependency,
View child,
boolean expanded,
boolean animated)
Reacts to a change in expanded state. This callback is guaranteed to be called only once even
if setExpanded(boolean) is called multiple times with the same value.
Upon configuration change, this callback is called with animated set to false.
| Parameters | |
|---|---|
dependency |
View: the ExpandableWidget dependency containing the new expanded state. |
child |
View: the view that should react to the change in expanded state. |
expanded |
boolean: the new expanded state. |
animated |
boolean: true if setExpanded(boolean) was called, false if
restoring from a configuration change. |
| Returns | |
|---|---|
boolean |
true if the Behavior changed the child view's size or position, false otherwise. |