BottomSheetBehavior

public class BottomSheetBehavior
extends Behavior<V extends View>

java.lang.Object
   ↳ androidx.coordinatorlayout.widget.CoordinatorLayout.Behavior<V extends android.view.View>
     ↳ com.google.android.material.bottomsheet.BottomSheetBehavior<V extends android.view.View>

An interaction behavior plugin for a child view of CoordinatorLayout to make it work as a bottom sheet.

To send useful accessibility events, set a title on bottom sheets that are windows or are window-like. For BottomSheetDialog use AppCompatDialog.setTitle(int), and for BottomSheetDialogFragment use ViewCompat.setAccessibilityPaneTitle(View, CharSequence).

For more information, see the component developer guidance and design guidelines.

Summary

Nested classes

class BottomSheetBehavior.BottomSheetCallback

Callback for monitoring events about bottom sheets. 

class BottomSheetBehavior.SavedState

State persisted across instances  

XML attributes

BottomSheetBehavior_Layout_android_maxHeight  
BottomSheetBehavior_Layout_android_maxWidth  
BottomSheetBehavior_Layout_behavior_draggable  
BottomSheetBehavior_Layout_behavior_expandedOffset  
BottomSheetBehavior_Layout_behavior_halfExpandedRatio  
BottomSheetBehavior_Layout_behavior_hideable  
BottomSheetBehavior_Layout_behavior_peekHeight  
BottomSheetBehavior_Layout_behavior_saveFlags  
BottomSheetBehavior_Layout_behavior_skipCollapsed  

Constants

int PEEK_HEIGHT_AUTO

Peek at the 16:9 ratio keyline of its parent.

int SAVE_ALL

This flag will preserve all aforementioned values on configuration change.

int SAVE_FIT_TO_CONTENTS

This flag will preserve the fitToContents boolean value on configuration change.

int SAVE_HIDEABLE

This flag will preserve the hideable boolean value on configuration change.

int SAVE_NONE

This flag will not preserve the aforementioned values set at runtime if the view is destroyed and recreated.

int SAVE_PEEK_HEIGHT

This flag will preserve the peekHeight int value on configuration change.

int SAVE_SKIP_COLLAPSED

This flag will preserve the skipCollapsed boolean value on configuration change.

int STATE_COLLAPSED

The bottom sheet is collapsed.

int STATE_DRAGGING

The bottom sheet is dragging.

int STATE_EXPANDED

The bottom sheet is expanded.

int STATE_HALF_EXPANDED

The bottom sheet is half-expanded (used when fitToContents is false).

int STATE_HIDDEN

The bottom sheet is hidden.

int STATE_SETTLING

The bottom sheet is settling.

Public constructors

BottomSheetBehavior()
BottomSheetBehavior(Context context, AttributeSet attrs)

Public methods

void addBottomSheetCallback(BottomSheetBehavior.BottomSheetCallback callback)

Adds a callback to be notified of bottom sheet events.

float calculateSlideOffset()

Calculates the current offset of the bottom sheet.

void cancelBackProgress()
static <V extends View> BottomSheetBehavior<V> from(V view)

A utility function to get the BottomSheetBehavior associated with the view.

int getExpandedOffset()

Returns the current expanded offset.

float getHalfExpandedRatio()

Gets the ratio for the height of the BottomSheet in the STATE_HALF_EXPANDED state.

float getHideFriction()

Gets the friction coefficient to hide the bottom sheet, or set it to the next closest expanded state.

int getMaxHeight()

Returns the bottom sheet's maximum height, or -1 if no maximum height is set.

int getMaxWidth()

Returns the bottom sheet's maximum width, or -1 if no maximum width is set.

int getPeekHeight()

Gets the height of the bottom sheet when it is collapsed.

int getSaveFlags()

Returns the save flags.

int getSignificantVelocityThreshold()
boolean getSkipCollapsed()

Sets whether this bottom sheet should skip the collapsed state when it is being hidden after it is expanded once.

int getState()

Gets the current state of the bottom sheet.

void handleBackInvoked()
boolean isDraggable()
boolean isFitToContents()
boolean isGestureInsetBottomIgnored()

Returns whether this bottom sheet should adjust it's position based on the system gesture area.

boolean isHideable()

Gets whether this bottom sheet can hide when it is swiped down.

boolean isShouldRemoveExpandedCorners()

Returns whether the bottom sheet will remove its corners when it reaches the expanded state.

void onAttachedToLayoutParams(CoordinatorLayout.LayoutParams layoutParams)
void onDetachedFromLayoutParams()
boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event)
boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection)
boolean onMeasureChild(CoordinatorLayout parent, V child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed)
boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, float velocityX, float velocityY)
void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed, int type)
void onNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type, int[] consumed)
void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state)
Parcelable onSaveInstanceState(CoordinatorLayout parent, V child)
boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, View directTargetChild, View target, int axes, int type)
void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target, int type)
boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event)
void removeBottomSheetCallback(BottomSheetBehavior.BottomSheetCallback callback)

Removes a previously added callback.

void setBottomSheetCallback(BottomSheetBehavior.BottomSheetCallback callback)

This method is deprecated. use addBottomSheetCallback(BottomSheetCallback) and removeBottomSheetCallback(BottomSheetCallback) instead

void setDraggable(boolean draggable)

Sets whether this bottom sheet is can be collapsed/expanded by dragging.

void setExpandedOffset(int offset)

Determines the top offset of the BottomSheet in the STATE_EXPANDED state when fitsToContent is false.

void setFitToContents(boolean fitToContents)

Sets whether the height of the expanded sheet is determined by the height of its contents, or if it is expanded in two stages (half the height of the parent container, full height of parent container).

void setGestureInsetBottomIgnored(boolean gestureInsetBottomIgnored)

Sets whether this bottom sheet should adjust it's position based on the system gesture area on Android Q and above.

void setHalfExpandedRatio(float ratio)

Determines the height of the BottomSheet in the STATE_HALF_EXPANDED state.

void setHideFriction(float hideFriction)

Sets the friction coefficient to hide the bottom sheet, or set it to the next closest expanded state.

void setHideable(boolean hideable)

Sets whether this bottom sheet can hide.

void setMaxHeight(int maxHeight)

Sets the maximum height of the bottom sheet.

void setMaxWidth(int maxWidth)

Sets the maximum width of the bottom sheet.

final void setPeekHeight(int peekHeight, boolean animate)

Sets the height of the bottom sheet when it is collapsed while optionally animating between the old height and the new height.

void setPeekHeight(int peekHeight)

Sets the height of the bottom sheet when it is collapsed.

void setSaveFlags(int flags)

Sets save flags to be preserved in bottomsheet on configuration change.

void setShouldRemoveExpandedCorners(boolean shouldRemoveExpandedCorners)

Sets whether the bottom sheet should remove its corners when it reaches the expanded state.

void setSignificantVelocityThreshold(int significantVelocityThreshold)
void setSkipCollapsed(boolean skipCollapsed)

Sets whether this bottom sheet should skip the collapsed state when it is being hidden after it is expanded once.

void setState(int state)

Sets the state of the bottom sheet.

void setUpdateImportantForAccessibilityOnSiblings(boolean updateImportantForAccessibilityOnSiblings)

Sets whether the BottomSheet should update the accessibility status of its CoordinatorLayout siblings when expanded.

void startBackProgress(BackEventCompat backEvent)
void updateBackProgress(BackEventCompat backEvent)

Inherited methods

XML attributes

BottomSheetBehavior_Layout_android_maxHeight

Related methods:

BottomSheetBehavior_Layout_android_maxWidth

Related methods:

BottomSheetBehavior_Layout_behavior_draggable

Related methods:

BottomSheetBehavior_Layout_behavior_expandedOffset

Related methods:

BottomSheetBehavior_Layout_behavior_halfExpandedRatio

Related methods:

BottomSheetBehavior_Layout_behavior_hideable

Related methods:

BottomSheetBehavior_Layout_behavior_peekHeight

Related methods:

BottomSheetBehavior_Layout_behavior_saveFlags

Related methods:

BottomSheetBehavior_Layout_behavior_skipCollapsed

Related methods:

Constants

PEEK_HEIGHT_AUTO

public static final int PEEK_HEIGHT_AUTO

Peek at the 16:9 ratio keyline of its parent.

This can be used as a parameter for setPeekHeight(int). getPeekHeight() will return this when the value is set.

Constant Value: -1 (0xffffffff)

SAVE_ALL

public static final int SAVE_ALL

This flag will preserve all aforementioned values on configuration change.

Constant Value: -1 (0xffffffff)

SAVE_FIT_TO_CONTENTS

public static final int SAVE_FIT_TO_CONTENTS

This flag will preserve the fitToContents boolean value on configuration change.

Constant Value: 2 (0x00000002)

SAVE_HIDEABLE

public static final int SAVE_HIDEABLE

This flag will preserve the hideable boolean value on configuration change.

Constant Value: 4 (0x00000004)

SAVE_NONE

public static final int SAVE_NONE

This flag will not preserve the aforementioned values set at runtime if the view is destroyed and recreated. The only value preserved will be the positional state, e.g. collapsed, hidden, expanded, etc. This is the default behavior.

Constant Value: 0 (0x00000000)

SAVE_PEEK_HEIGHT

public static final int SAVE_PEEK_HEIGHT

This flag will preserve the peekHeight int value on configuration change.

Constant Value: 1 (0x00000001)

SAVE_SKIP_COLLAPSED

public static final int SAVE_SKIP_COLLAPSED

This flag will preserve the skipCollapsed boolean value on configuration change.

Constant Value: 8 (0x00000008)

STATE_COLLAPSED

public static final int STATE_COLLAPSED

The bottom sheet is collapsed.

Constant Value: 4 (0x00000004)

STATE_DRAGGING

public static final int STATE_DRAGGING

The bottom sheet is dragging.

Constant Value: 1 (0x00000001)

STATE_EXPANDED

public static final int STATE_EXPANDED

The bottom sheet is expanded.

Constant Value: 3 (0x00000003)

STATE_HALF_EXPANDED

public static final int STATE_HALF_EXPANDED

The bottom sheet is half-expanded (used when fitToContents is false).

Constant Value: 6 (0x00000006)

STATE_HIDDEN

public static final int STATE_HIDDEN

The bottom sheet is hidden.

Constant Value: 5 (0x00000005)

STATE_SETTLING

public static final int STATE_SETTLING

The bottom sheet is settling.

Constant Value: 2 (0x00000002)

Public constructors

BottomSheetBehavior

public BottomSheetBehavior ()

BottomSheetBehavior

public BottomSheetBehavior (Context context, 
                AttributeSet attrs)

Parameters
context Context

attrs AttributeSet

Public methods

addBottomSheetCallback

public void addBottomSheetCallback (BottomSheetBehavior.BottomSheetCallback callback)

Adds a callback to be notified of bottom sheet events.

Parameters
callback BottomSheetBehavior.BottomSheetCallback: The callback to notify when bottom sheet events occur.

calculateSlideOffset

public float calculateSlideOffset ()

Calculates the current offset of the bottom sheet. This method should be called when the child view is laid out.

Returns
float The offset of this bottom sheet within [-1,1] range. Offset increases as this bottom sheet is moving upward. From 0 to 1 the sheet is between collapsed and expanded states and from -1 to 0 it is between hidden and collapsed states. Returns -1 if the bottom sheet is not laid out (therefore it's hidden).

cancelBackProgress

public void cancelBackProgress ()

from

public static BottomSheetBehavior<V> from (V view)

A utility function to get the BottomSheetBehavior associated with the view.

Parameters
view V: The View with BottomSheetBehavior.
Returns
BottomSheetBehavior<V> The BottomSheetBehavior associated with the view.

getExpandedOffset

public int getExpandedOffset ()

Returns the current expanded offset. If fitToContents is true, it will automatically pick the offset depending on the height of the content.

Related XML Attributes:

Returns
int

getHalfExpandedRatio

public float getHalfExpandedRatio ()

Gets the ratio for the height of the BottomSheet in the STATE_HALF_EXPANDED state.

Related XML Attributes:

Returns
float

getHideFriction

public float getHideFriction ()

Gets the friction coefficient to hide the bottom sheet, or set it to the next closest expanded state.

Returns
float The friction coefficient that determines the swipe velocity needed to hide or set the bottom sheet to the closest expanded state.

getMaxHeight

public int getMaxHeight ()

Returns the bottom sheet's maximum height, or -1 if no maximum height is set.

Related XML Attributes:

Returns
int

See also:

getMaxWidth

public int getMaxWidth ()

Returns the bottom sheet's maximum width, or -1 if no maximum width is set.

Related XML Attributes:

Returns
int

See also:

getPeekHeight

public int getPeekHeight ()

Gets the height of the bottom sheet when it is collapsed.

Related XML Attributes:

Returns
int The height of the collapsed bottom sheet in pixels, or PEEK_HEIGHT_AUTO if the sheet is configured to peek automatically at 16:9 ratio keyline

getSaveFlags

public int getSaveFlags ()

Returns the save flags.

Related XML Attributes:

Returns
int

See also:

getSignificantVelocityThreshold

public int getSignificantVelocityThreshold ()

Returns
int

getSkipCollapsed

public boolean getSkipCollapsed ()

Sets whether this bottom sheet should skip the collapsed state when it is being hidden after it is expanded once.

Related XML Attributes:

Returns
boolean Whether the bottom sheet should skip the collapsed state.

getState

public int getState ()

Gets the current state of the bottom sheet.

Returns
int One of STATE_EXPANDED, STATE_HALF_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, or STATE_SETTLING.

handleBackInvoked

public void handleBackInvoked ()

isDraggable

public boolean isDraggable ()

Returns
boolean

isFitToContents

public boolean isFitToContents ()

Returns
boolean whether the height of the expanded sheet is determined by the height of its contents, or if it is expanded in two stages (half the height of the parent container, full height of parent container).

isGestureInsetBottomIgnored

public boolean isGestureInsetBottomIgnored ()

Returns whether this bottom sheet should adjust it's position based on the system gesture area.

Returns
boolean

isHideable

public boolean isHideable ()

Gets whether this bottom sheet can hide when it is swiped down.

Related XML Attributes:

Returns
boolean true if this bottom sheet can hide.

isShouldRemoveExpandedCorners

public boolean isShouldRemoveExpandedCorners ()

Returns whether the bottom sheet will remove its corners when it reaches the expanded state.

Returns
boolean

onAttachedToLayoutParams

public void onAttachedToLayoutParams (CoordinatorLayout.LayoutParams layoutParams)

Parameters
layoutParams CoordinatorLayout.LayoutParams

onDetachedFromLayoutParams

public void onDetachedFromLayoutParams ()

onInterceptTouchEvent

public boolean onInterceptTouchEvent (CoordinatorLayout parent, 
                V child, 
                MotionEvent event)

Parameters
parent CoordinatorLayout

child V

event MotionEvent

Returns
boolean

onLayoutChild

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

Parameters
parent CoordinatorLayout

child V

layoutDirection int

Returns
boolean

onMeasureChild

public boolean onMeasureChild (CoordinatorLayout parent, 
                V child, 
                int parentWidthMeasureSpec, 
                int widthUsed, 
                int parentHeightMeasureSpec, 
                int heightUsed)

Parameters
parent CoordinatorLayout

child V

parentWidthMeasureSpec int

widthUsed int

parentHeightMeasureSpec int

heightUsed int

Returns
boolean

onNestedPreFling

public boolean onNestedPreFling (CoordinatorLayout coordinatorLayout, 
                V child, 
                View target, 
                float velocityX, 
                float velocityY)

Parameters
coordinatorLayout CoordinatorLayout

child V

target View

velocityX float

velocityY float

Returns
boolean

onNestedPreScroll

public void onNestedPreScroll (CoordinatorLayout coordinatorLayout, 
                V child, 
                View target, 
                int dx, 
                int dy, 
                int[] consumed, 
                int type)

Parameters
coordinatorLayout CoordinatorLayout

child V

target View

dx int

dy int

consumed int

type int

onNestedScroll

public void onNestedScroll (CoordinatorLayout coordinatorLayout, 
                V child, 
                View target, 
                int dxConsumed, 
                int dyConsumed, 
                int dxUnconsumed, 
                int dyUnconsumed, 
                int type, 
                int[] consumed)

Parameters
coordinatorLayout CoordinatorLayout

child V

target View

dxConsumed int

dyConsumed int

dxUnconsumed int

dyUnconsumed int

type int

consumed int

onRestoreInstanceState

public void onRestoreInstanceState (CoordinatorLayout parent, 
                V child, 
                Parcelable state)

Parameters
parent CoordinatorLayout

child V

state Parcelable

onSaveInstanceState

public Parcelable onSaveInstanceState (CoordinatorLayout parent, 
                V child)

Parameters
parent CoordinatorLayout

child V

Returns
Parcelable

onStartNestedScroll

public boolean onStartNestedScroll (CoordinatorLayout coordinatorLayout, 
                V child, 
                View directTargetChild, 
                View target, 
                int axes, 
                int type)

Parameters
coordinatorLayout CoordinatorLayout

child V

directTargetChild View

target View

axes int

type int

Returns
boolean

onStopNestedScroll

public void onStopNestedScroll (CoordinatorLayout coordinatorLayout, 
                V child, 
                View target, 
                int type)

Parameters
coordinatorLayout CoordinatorLayout

child V

target View

type int

onTouchEvent

public boolean onTouchEvent (CoordinatorLayout parent, 
                V child, 
                MotionEvent event)

Parameters
parent CoordinatorLayout

child V

event MotionEvent

Returns
boolean

removeBottomSheetCallback

public void removeBottomSheetCallback (BottomSheetBehavior.BottomSheetCallback callback)

Removes a previously added callback.

Parameters
callback BottomSheetBehavior.BottomSheetCallback: The callback to remove.

setBottomSheetCallback

public void setBottomSheetCallback (BottomSheetBehavior.BottomSheetCallback callback)

This method is deprecated.
use addBottomSheetCallback(BottomSheetCallback) and removeBottomSheetCallback(BottomSheetCallback) instead

Sets a callback to be notified of bottom sheet events.

Parameters
callback BottomSheetBehavior.BottomSheetCallback: The callback to notify when bottom sheet events occur.

setDraggable

public void setDraggable (boolean draggable)

Sets whether this bottom sheet is can be collapsed/expanded by dragging. Note: When disabling dragging, an app will require to implement a custom way to expand/collapse the bottom sheet

Related XML Attributes:

Parameters
draggable boolean: false to prevent dragging the sheet to collapse and expand

setExpandedOffset

public void setExpandedOffset (int offset)

Determines the top offset of the BottomSheet in the STATE_EXPANDED state when fitsToContent is false. The default value is 0, which results in the sheet matching the parent's top.

Related XML Attributes:

Parameters
offset int: an integer value greater than equal to 0, representing the STATE_EXPANDED offset. Value must not exceed the offset in the half expanded state.

setFitToContents

public void setFitToContents (boolean fitToContents)

Sets whether the height of the expanded sheet is determined by the height of its contents, or if it is expanded in two stages (half the height of the parent container, full height of parent container). Default value is true.

Parameters
fitToContents boolean: whether or not to fit the expanded sheet to its contents.

setGestureInsetBottomIgnored

public void setGestureInsetBottomIgnored (boolean gestureInsetBottomIgnored)

Sets whether this bottom sheet should adjust it's position based on the system gesture area on Android Q and above.

Note: the bottom sheet will only adjust it's position if it would be unable to be scrolled upwards because the peekHeight is less than the gesture inset margins,(because that would cause a gesture conflict), gesture navigation is enabled, and this ignoreGestureInsetBottom flag is false.

Parameters
gestureInsetBottomIgnored boolean

setHalfExpandedRatio

public void setHalfExpandedRatio (float ratio)

Determines the height of the BottomSheet in the STATE_HALF_EXPANDED state. The material guidelines recommended a value of 0.5, which results in the sheet filling half of the parent. The height of the BottomSheet will be smaller as this ratio is decreased and taller as it is increased. The default value is 0.5.

Related XML Attributes:

Parameters
ratio float: a float between 0 and 1, representing the STATE_HALF_EXPANDED ratio.

setHideFriction

public void setHideFriction (float hideFriction)

Sets the friction coefficient to hide the bottom sheet, or set it to the next closest expanded state.

Parameters
hideFriction float: The friction coefficient that determines the swipe velocity needed to hide or set the bottom sheet to the closest expanded state.

setHideable

public void setHideable (boolean hideable)

Sets whether this bottom sheet can hide.

Related XML Attributes:

Parameters
hideable boolean: true to make this bottom sheet hideable.

setMaxHeight

public void setMaxHeight (int maxHeight)

Sets the maximum height of the bottom sheet. This method should be called before Dialog.show() in order for the height to be adjusted as expected.

Related XML Attributes:

Parameters
maxHeight int: The maximum height in pixels to be set

See also:

setMaxWidth

public void setMaxWidth (int maxWidth)

Sets the maximum width of the bottom sheet. The layout will be at most this dimension wide. This method should be called before Dialog.show() in order for the width to be adjusted as expected.

Related XML Attributes:

Parameters
maxWidth int: The maximum width in pixels to be set

See also:

setPeekHeight

public final void setPeekHeight (int peekHeight, 
                boolean animate)

Sets the height of the bottom sheet when it is collapsed while optionally animating between the old height and the new height.

Related XML Attributes:

Parameters
peekHeight int: The height of the collapsed bottom sheet in pixels, or PEEK_HEIGHT_AUTO to configure the sheet to peek automatically at 16:9 ratio keyline.
animate boolean: Whether to animate between the old height and the new height.

setPeekHeight

public void setPeekHeight (int peekHeight)

Sets the height of the bottom sheet when it is collapsed.

Related XML Attributes:

Parameters
peekHeight int: The height of the collapsed bottom sheet in pixels, or PEEK_HEIGHT_AUTO to configure the sheet to peek automatically at 16:9 ratio keyline.

setSaveFlags

public void setSaveFlags (int flags)

Sets save flags to be preserved in bottomsheet on configuration change.

Related XML Attributes:

Parameters
flags int: bitwise int of SAVE_PEEK_HEIGHT, SAVE_FIT_TO_CONTENTS, SAVE_HIDEABLE, SAVE_SKIP_COLLAPSED, SAVE_ALL and SAVE_NONE.

See also:

setShouldRemoveExpandedCorners

public void setShouldRemoveExpandedCorners (boolean shouldRemoveExpandedCorners)

Sets whether the bottom sheet should remove its corners when it reaches the expanded state.

If false, the bottom sheet will only remove its corners if it is expanded and reaches the top of the screen.

Parameters
shouldRemoveExpandedCorners boolean

setSignificantVelocityThreshold

public void setSignificantVelocityThreshold (int significantVelocityThreshold)

Parameters
significantVelocityThreshold int

setSkipCollapsed

public void setSkipCollapsed (boolean skipCollapsed)

Sets whether this bottom sheet should skip the collapsed state when it is being hidden after it is expanded once. Setting this to true has no effect unless the sheet is hideable.

Related XML Attributes:

Parameters
skipCollapsed boolean: True if the bottom sheet should skip the collapsed state.

setState

public void setState (int state)

Sets the state of the bottom sheet. The bottom sheet will transition to that state with animation.

Parameters
state int: One of STATE_COLLAPSED, STATE_EXPANDED, STATE_HIDDEN, or STATE_HALF_EXPANDED.

setUpdateImportantForAccessibilityOnSiblings

public void setUpdateImportantForAccessibilityOnSiblings (boolean updateImportantForAccessibilityOnSiblings)

Sets whether the BottomSheet should update the accessibility status of its CoordinatorLayout siblings when expanded.

Set this to true if the expanded state of the sheet blocks access to siblings (e.g., when the sheet expands over the full screen).

Parameters
updateImportantForAccessibilityOnSiblings boolean

startBackProgress

public void startBackProgress (BackEventCompat backEvent)

Parameters
backEvent BackEventCompat

updateBackProgress

public void updateBackProgress (BackEventCompat backEvent)

Parameters
backEvent BackEventCompat