Summary: Ctors | Methods | Protected Methods | Inherited Methods

ExpandableBehavior

public abstract class ExpandableBehavior
extends Behavior

java.lang.Object
↳	androidx.coordinatorlayout.widget.CoordinatorLayout.Behavior
	↳	com.google.android.material.transformation.ExpandableBehavior

Known direct subclasses

ExpandableTransformationBehavior

ExpandableTransformationBehavior This class is deprecated. Use MaterialContainerTransform instead.

Known indirect subclasses

FabTransformationBehavior, FabTransformationScrimBehavior, FabTransformationSheetBehavior

FabTransformationBehavior	This class is deprecated. Use `MaterialContainerTransform` instead.
FabTransformationScrimBehavior	This class is deprecated. Use `MaterialContainerTransform` instead.
FabTransformationSheetBehavior	This class is deprecated. Use `MaterialContainerTransform` instead.

This class is deprecated.
Use MaterialContainerTransform instead.

Base Behavior for views that can react to an ExpandableWidget's ExpandableWidget.setExpanded(boolean) state changes.

Summary

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

Public methods
`static ExpandableBehavior> T`	`from(View view, Class klass)` A utility function to get the `ExpandableBehavior` attached to the `view`.
`abstract boolean`	`layoutDependsOn(CoordinatorLayout parent, View child, View dependency)`
`boolean`	`onDependentViewChanged(CoordinatorLayout parent, View child, View dependency)`
`boolean`	`onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection)`

Protected methods
`ExpandableWidget`	`findExpandableWidget(CoordinatorLayout parent, View child)`
`abstract boolean`	`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

`boolean`	`blocksInteractionBelow(CoordinatorLayout arg0, V arg1)`
`boolean`	`getInsetDodgeRect(CoordinatorLayout arg0, V arg1, Rect arg2)`
`int`	`getScrimColor(CoordinatorLayout arg0, V arg1)`
`float`	`getScrimOpacity(CoordinatorLayout arg0, V arg1)`
`static Object`	`getTag(View arg0)`
`boolean`	`layoutDependsOn(CoordinatorLayout arg0, V arg1, View arg2)`
`WindowInsetsCompat`	`onApplyWindowInsets(CoordinatorLayout arg0, V arg1, WindowInsetsCompat arg2)`
`void`	`onAttachedToLayoutParams(CoordinatorLayout.LayoutParams arg0)`
`boolean`	`onDependentViewChanged(CoordinatorLayout arg0, V arg1, View arg2)`
`void`	`onDependentViewRemoved(CoordinatorLayout arg0, V arg1, View arg2)`
`void`	`onDetachedFromLayoutParams()`
`boolean`	`onInterceptTouchEvent(CoordinatorLayout arg0, V arg1, MotionEvent arg2)`
`boolean`	`onLayoutChild(CoordinatorLayout arg0, V arg1, int arg2)`
`boolean`	`onMeasureChild(CoordinatorLayout arg0, V arg1, int arg2, int arg3, int arg4, int arg5)`
`boolean`	`onNestedFling(CoordinatorLayout arg0, V arg1, View arg2, float arg3, float arg4, boolean arg5)`
`boolean`	`onNestedPreFling(CoordinatorLayout arg0, V arg1, View arg2, float arg3, float arg4)`
`void`	`onNestedPreScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3, int arg4, int[] arg5, int arg6)`
`void`	`onNestedPreScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3, int arg4, int[] arg5)`
`void`	`onNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3, int arg4, int arg5, int arg6, int arg7)`
`void`	`onNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3, int arg4, int arg5, int arg6, int arg7, int[] arg8)`
`void`	`onNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3, int arg4, int arg5, int arg6)`
`void`	`onNestedScrollAccepted(CoordinatorLayout arg0, V arg1, View arg2, View arg3, int arg4, int arg5)`
`void`	`onNestedScrollAccepted(CoordinatorLayout arg0, V arg1, View arg2, View arg3, int arg4)`
`boolean`	`onRequestChildRectangleOnScreen(CoordinatorLayout arg0, V arg1, Rect arg2, boolean arg3)`
`void`	`onRestoreInstanceState(CoordinatorLayout arg0, V arg1, Parcelable arg2)`
`Parcelable`	`onSaveInstanceState(CoordinatorLayout arg0, V arg1)`
`boolean`	`onStartNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, View arg3, int arg4, int arg5)`
`boolean`	`onStartNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, View arg3, int arg4)`
`void`	`onStopNestedScroll(CoordinatorLayout arg0, V arg1, View arg2, int arg3)`
`void`	`onStopNestedScroll(CoordinatorLayout arg0, V arg1, View arg2)`
`boolean`	`onTouchEvent(CoordinatorLayout arg0, V arg1, MotionEvent arg2)`
`static void`	`setTag(View arg0, Object arg1)`

From class


        
          java.lang.Object

`Object`	`clone()`
`boolean`	`equals(Object arg0)`
`void`	`finalize()`
`final Class`	`getClass()`
`int`	`hashCode()`
`final void`	`notify()`
`final void`	`notifyAll()`
`String`	`toString()`
`final void`	`wait(long arg0, int arg1)`
`final void`	`wait(long arg0)`
`final void`	`wait()`

Public constructors

ExpandableBehavior

public ExpandableBehavior ()

ExpandableBehavior

public ExpandableBehavior (Context context, 
                AttributeSet attrs)

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

Public methods

from

public static T from (View view, 
                Class 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
`T`	The `ExpandableBehavior` attached to the `view`.

public abstract boolean layoutDependsOn (CoordinatorLayout parent, 
                View child, 
                View dependency)

Parameters
`parent`	`CoordinatorLayout`
`child`	`View`
`dependency`	`View`

Returns
`boolean`

public boolean onDependentViewChanged (CoordinatorLayout parent, 
                View child, 
                View dependency)

Parameters
`parent`	`CoordinatorLayout`
`child`	`View`
`dependency`	`View`

Returns
`boolean`

public boolean onLayoutChild (CoordinatorLayout parent, 
                View child, 
                int layoutDirection)

Parameters
`parent`	`CoordinatorLayout`
`child`	`View`
`layoutDirection`	`int`

Returns
`boolean`

Protected methods

protected ExpandableWidget findExpandableWidget (CoordinatorLayout parent, 
                View child)

Parameters
`parent`	`CoordinatorLayout`
`child`	`View`

Returns
`ExpandableWidget`

onExpandedStateChange

protected abstract 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 ExpandableWidget.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 `ExpandableWidget.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.