HorizontalGridView - Android SDK

public class

HorizontalGridView

extends RecyclerView

java.lang.Object
↳	android.view.View
	↳	android.view.ViewGroup
		↳	android.support.v7.widget.RecyclerView
			↳	android.support.v17.leanback.widget.HorizontalGridView

Class Overview

A ViewGroup that shows items in a horizontal scrolling list. The items come from the RecyclerView.Adapter associated with this view.

RecyclerView.Adapter can optionally implement FacetProviderAdapter which provides FacetProvider for a given view type; RecyclerView.ViewHolder can also implement FacetProvider. Facet from ViewHolder has a higher priority than the one from FacetProiderAdapter associated with viewType. Supported optional facets are:

ItemAlignmentFacet When this facet is provided by ViewHolder or FacetProviderAdapter, it will override the item alignment settings set on HorizontalGridView. This facet also allows multiple alignment positions within one ViewHolder.

Summary

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Inherited XML Attributes

From class android.support.v7.widget.RecyclerView

From class android.view.ViewGroup

From class android.view.View

Constants
int	FOCUS_SCROLL_ALIGNED	Always keep focused item at a aligned position.
int	FOCUS_SCROLL_ITEM	Scroll to make the focused item inside client area.
int	FOCUS_SCROLL_PAGE	Scroll a page of items when focusing to item outside the client area.
float	ITEM_ALIGN_OFFSET_PERCENT_DISABLED	Value indicates that percent is not used.
int	SAVE_ALL_CHILD	Save on screen views plus save off screen child views without any limitation.
int	SAVE_LIMITED_CHILD	Save on screen views plus save off screen child views states up to `getSaveChildrenLimitNumber()`.
int	SAVE_NO_CHILD	Dont save states of any child views.
int	SAVE_ON_SCREEN_CHILD	Only save on screen child views, the states are lost when they become off screen.
int	WINDOW_ALIGN_BOTH_EDGE	The first item and last item are aligned with the two edges of the viewport.
int	WINDOW_ALIGN_HIGH_EDGE	The last item is aligned with the high edge of the viewport when navigating to the end of list.
int	WINDOW_ALIGN_LOW_EDGE	The first item is aligned with the low edge of the viewport.
int	WINDOW_ALIGN_NO_EDGE	The focused item always stays in a middle location.
float	WINDOW_ALIGN_OFFSET_PERCENT_DISABLED	Value indicates that percent is not used.

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Inherited Constants

From class android.support.v7.widget.RecyclerView

From class android.view.ViewGroup

From class android.view.View

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Inherited Fields

From class android.view.View

Public Constructors
	HorizontalGridView(Context context)
	HorizontalGridView(Context context, AttributeSet attrs)
	HorizontalGridView(Context context, AttributeSet attrs, int defStyle)

Public Methods
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchTouchEvent(MotionEvent event) Pass the touch screen motion event down to the target view, or this view if it is the target.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
View	focusSearch(int direction) Find the nearest view in the specified direction that can take focus.
int	getChildDrawingOrder(int childCount, int i) Returns the index of the child to draw for this iteration.
final boolean	getFadingLeftEdge() Returns true if left edge fading is enabled.
final int	getFadingLeftEdgeLength() Returns the left edge fading length in pixels.
final int	getFadingLeftEdgeOffset() Returns the distance in pixels between fading start position and left padding edge.
final boolean	getFadingRightEdge() Returns true if fading right edge is enabled.
final int	getFadingRightEdgeLength() Returns the right edge fading length in pixels.
final int	getFadingRightEdgeOffset() Sets the distance in pixels between fading start position and right padding edge.
int	getFocusScrollStrategy() Returns the strategy used to scroll in response to item focus changing.
int	getHorizontalMargin() Returns the margin in pixels between two child items horizontally.
int	getItemAlignmentOffset() Returns the absolute offset in pixels for item alignment.
float	getItemAlignmentOffsetPercent() Returns the offset percent for item alignment in addition to `getItemAlignmentOffset()`.
int	getItemAlignmentViewId() Returns the id of the view to align with, or zero for the item view itself.
BaseGridView.OnUnhandledKeyListener	getOnUnhandledKeyListener() Returns the unhandled key listener.
final int	getSaveChildrenLimitNumber() Returns the limit used when when `getSaveChildrenPolicy()` is `SAVE_LIMITED_CHILD`
final int	getSaveChildrenPolicy() Returns the policy for saving children.
int	getSelectedPosition() Returns the selected item position.
int	getSelectedSubPosition() Returns the sub selected item position started from zero.
int	getVerticalMargin() Returns the margin in pixels between two child items vertically.
void	getViewSelectedOffsets(View view, int[] offsets) Returns the x/y offsets to final position from current position if the view is selected.
int	getWindowAlignment() Returns the method for focused item alignment in the view.
int	getWindowAlignmentOffset() Returns the offset in pixels for window alignment.
float	getWindowAlignmentOffsetPercent() Returns the offset percent for window alignment in addition to `getWindowAlignmentOffset()`.
boolean	hasOverlappingRendering() Returns whether this View has content which overlaps.
boolean	hasPreviousViewInSameRow(int position) Returns true if the view at the given position has a same row sibling in front of it.
boolean	isChildLayoutAnimated() Returns true if an animation will run when a child changes size or when adding or removing a child.
boolean	isFocusDrawingOrderEnabled() Returns true if default "focus draw at last" order rule is enabled.
final boolean	isFocusSearchDisabled() Returns true if focus search is disabled.
boolean	isItemAlignmentOffsetWithPadding() Returns true if include padding in calculating item align offset.
boolean	isScrollEnabled() Returns true if scrolling is enabled.
boolean	onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) Look for a descendant to call `requestFocus()` on.
void	onRtlPropertiesChanged(int layoutDirection) Notify layout manager that layout directionality has been updated
void	setAnimateChildLayout(boolean animateChildLayout) Sets whether an animation should run when a child changes size or when adding or removing a child.
void	setChildrenVisibility(int visibility) Changes and overrides children's visibility.
final void	setFadingLeftEdge(boolean fading) Sets the fade out left edge to transparent.
final void	setFadingLeftEdgeLength(int fadeLength) Sets the left edge fading length in pixels.
final void	setFadingLeftEdgeOffset(int fadeOffset) Sets the distance in pixels between fading start position and left padding edge.
final void	setFadingRightEdge(boolean fading) Sets the fade out right edge to transparent.
final void	setFadingRightEdgeLength(int fadeLength) Sets the right edge fading length in pixels.
final void	setFadingRightEdgeOffset(int fadeOffset) Returns the distance in pixels between fading start position and right padding edge.
void	setFocusDrawingOrderEnabled(boolean enabled) Enables or disables the default "focus draw at last" order rule.
void	setFocusScrollStrategy(int scrollStrategy) Sets the strategy used to scroll in response to item focus changing: `FOCUS_SCROLL_ALIGNED` (default) `FOCUS_SCROLL_ITEM` `FOCUS_SCROLL_PAGE`
final void	setFocusSearchDisabled(boolean disabled) Disables or enables focus search.
void	setGravity(int gravity) Sets the gravity used for child view positioning.
void	setHasOverlappingRendering(boolean hasOverlapping)
void	setHorizontalMargin(int margin) Sets the margin in pixels between two child items horizontally.
void	setItemAlignmentOffset(int offset) Sets the absolute offset in pixels for item alignment.
void	setItemAlignmentOffsetPercent(float offsetPercent) Sets the offset percent for item alignment in addition to `getItemAlignmentOffset()`.
void	setItemAlignmentOffsetWithPadding(boolean withPadding) Set to true if include padding in calculating item align offset.
void	setItemAlignmentViewId(int viewId) Sets the id of the view to align with.
void	setItemMargin(int margin) Sets the margin in pixels between two child items.
void	setLayoutEnabled(boolean layoutEnabled) Enables or disables layout.
void	setNumRows(int numRows) Sets the number of rows.
void	setOnChildLaidOutListener(OnChildLaidOutListener listener) Registers a callback to be invoked when an item in BaseGridView has been laid out.
void	setOnChildSelectedListener(OnChildSelectedListener listener) Registers a callback to be invoked when an item in BaseGridView has been selected.
void	setOnChildViewHolderSelectedListener(OnChildViewHolderSelectedListener listener) Registers a callback to be invoked when an item in BaseGridView has been selected.
void	setOnKeyInterceptListener(BaseGridView.OnKeyInterceptListener listener) Sets the key intercept listener.
void	setOnMotionInterceptListener(BaseGridView.OnMotionInterceptListener listener) Sets the generic motion intercept listener.
void	setOnTouchInterceptListener(BaseGridView.OnTouchInterceptListener listener) Sets the touch intercept listener.
void	setOnUnhandledKeyListener(BaseGridView.OnUnhandledKeyListener listener) Sets the unhandled key listener.
void	setPruneChild(boolean pruneChild) Enables or disables pruning of children.
void	setRecyclerListener(RecyclerView.RecyclerListener listener) Register a listener that will be notified whenever a child view is recycled.
void	setRowHeight(int height) Sets the row height.
final void	setSaveChildrenLimitNumber(int limitNumber) Sets the limit number when `getSaveChildrenPolicy()` is `SAVE_LIMITED_CHILD`.
final void	setSaveChildrenPolicy(int savePolicy) Sets the policy for saving children.
void	setScrollEnabled(boolean scrollEnabled) Enables or disables scrolling.
void	setSelectedPosition(int position, int scrollExtra) Changes the selected item immediately without animation, scrollExtra is applied in primary scroll direction.
void	setSelectedPosition(int position) Changes the selected item immediately without animation.
void	setSelectedPositionSmooth(int position) Changes the selected item and run an animation to scroll to the target position.
void	setSelectedPositionSmoothWithSub(int position, int subposition) Changes the selected item and/or subposition, runs an animation to scroll to the target position.
void	setSelectedPositionWithSub(int position, int subposition, int scrollExtra) Changes the selected item and/or subposition immediately without animation, scrollExtra is applied in primary scroll direction.
void	setSelectedPositionWithSub(int position, int subposition) Changes the selected item and/or subposition immediately without animation.
void	setVerticalMargin(int margin) Sets the margin in pixels between two child items vertically.
void	setWindowAlignment(int windowAlignment) Sets the method for focused item alignment in the view.
void	setWindowAlignmentOffset(int offset) Sets the offset in pixels for window alignment.
void	setWindowAlignmentOffsetPercent(float offsetPercent) Sets the offset percent for window alignment in addition to `getWindowAlignmentOffset()`.

Protected Methods
void	initAttributes(Context context, AttributeSet attrs)
void	initBaseGridViewAttributes(Context context, AttributeSet attrs)
void	onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.

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Inherited Methods

From class android.support.v7.widget.RecyclerView

From class android.view.ViewGroup

void	addChildrenForAccessibility(ArrayList<View> outChildren) Adds the children of this View relevant for accessibility to the given list as output.
void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
boolean	addStatesFromChildren() Returns whether this ViewGroup's drawable states also include its children's drawable states.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
void	addView(View child, int index, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, int index) Adds a child view.
void	addView(View child) Adds a child view.
void	addView(View child, int width, int height) Adds a child view with this ViewGroup's default layout parameters and the specified width and height.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params, boolean preventRequestLayout) Adds a view during layout.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params) Adds a view during layout.
void	attachLayoutAnimationParameters(View child, ViewGroup.LayoutParams params, int index, int count) Subclasses should override this method to set layout animation parameters on the supplied child.
void	attachViewToParent(View child, int index, ViewGroup.LayoutParams params) Attaches a view to this view group.
void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children.
boolean	canAnimate() Indicates whether the view group has the ability to animate its children after the first layout.
boolean	checkLayoutParams(ViewGroup.LayoutParams p)
void	childDrawableStateChanged(View child) If `addStatesFromChildren()` is true, refreshes this group's drawable state (to include the states from its children).
void	childHasTransientStateChanged(View child, boolean childHasTransientState) Called when a child view has changed whether or not it is tracking transient state.
void	cleanupLayoutState(View child) Prevents the specified child to be laid out during the next layout pass.
void	clearChildFocus(View child) Called when a child of this parent is giving up focus
void	clearDisappearingChildren() Removes any pending animations for views that have been removed.
void	clearFocus() Called when this view wants to give up focus.
void	debug(int depth) Prints information about this view in the log output, with the tag `VIEW_LOG_TAG`.
void	detachAllViewsFromParent() Detaches all views from the parent.
void	detachViewFromParent(View child) Detaches a view from its parent.
void	detachViewFromParent(int index) Detaches a view from its parent.
void	detachViewsFromParent(int start, int count) Detaches a range of views from their parents.
WindowInsets	dispatchApplyWindowInsets(WindowInsets insets) Request to apply the given window insets to this view or another view in its subtree.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
boolean	dispatchDragEvent(DragEvent event) Detects if this View is enabled and has a drag event listener.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchDrawableHotspotChanged(float x, float y) Dispatches drawable hotspot changes to child views that meet at least one of the following criteria: Returns `false` from both `isClickable()` and `isLongClickable()` Requests duplication of parent state via `setDuplicateParentStateEnabled(boolean)`
void	dispatchFreezeSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `saveHierarchyState(android.util.SparseArray)` freeze()} to only this view, not to its children.
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchGenericPointerEvent(MotionEvent event) Dispatch a generic motion event to the view under the first pointer.
boolean	dispatchHoverEvent(MotionEvent event) Dispatch a hover event.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
void	dispatchProvideStructure(ViewStructure structure) Dispatch creation of `ViewStructure` down the hierarchy.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(android.util.SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(android.util.SparseArray)` to store the state for this view and its children.
void	dispatchSetActivated(boolean activated) Dispatch setActivated to all of this View's children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchSystemUiVisibilityChanged(int visible) Dispatch callbacks to `setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener)` down the view hierarchy.
void	dispatchThawSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `restoreHierarchyState(android.util.SparseArray)` to only this view, not to its children.
boolean	dispatchTouchEvent(MotionEvent ev) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowSystemUiVisiblityChanged(int visible) Dispatch callbacks to `onWindowSystemUiVisibilityChanged(int)` down the view hierarchy.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
boolean	drawChild(Canvas canvas, View child, long drawingTime) Draw one child of this View Group.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
void	endViewTransition(View view) This method should always be called following an earlier call to `startViewTransition(View)`.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
void	findViewsWithText(ArrayList<View> outViews, CharSequence text, int flags) Finds the Views that contain given text.
View	focusSearch(View focused, int direction) Find the nearest view in the specified direction that wants to take focus.
void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
boolean	gatherTransparentRegion(Region region) This is used by the RootView to perform an optimization when the view hierarchy contains one or several SurfaceView.
ViewGroup.LayoutParams	generateDefaultLayoutParams() Returns a set of default layout parameters.
ViewGroup.LayoutParams	generateLayoutParams(AttributeSet attrs) Returns a new set of layout parameters based on the supplied attributes set.
ViewGroup.LayoutParams	generateLayoutParams(ViewGroup.LayoutParams p) Returns a safe set of layout parameters based on the supplied layout params.
CharSequence	getAccessibilityClassName() Return the class name of this object to be used for accessibility purposes.
View	getChildAt(int index) Returns the view at the specified position in the group.
int	getChildCount() Returns the number of children in the group.
int	getChildDrawingOrder(int childCount, int i) Returns the index of the child to draw for this iteration.
static int	getChildMeasureSpec(int spec, int padding, int childDimension) Does the hard part of measureChildren: figuring out the MeasureSpec to pass to a particular child.
boolean	getChildStaticTransformation(View child, Transformation t) Sets `t` to be the static transformation of the child, if set, returning a boolean to indicate whether a static transform was set.
boolean	getChildVisibleRect(View child, Rect r, Point offset) Compute the visible part of a rectangular region defined in terms of a child view's coordinates.
boolean	getClipChildren() Returns whether this group's children are clipped to their bounds before drawing.
boolean	getClipToPadding() Returns whether this ViewGroup will clip its children to its padding, and resize (but not clip) any EdgeEffect to the padded region, if padding is present.
int	getDescendantFocusability() Gets the descendant focusability of this view group.
View	getFocusedChild() Returns the focused child of this view, if any.
LayoutAnimationController	getLayoutAnimation() Returns the layout animation controller used to animate the group's children.
Animation.AnimationListener	getLayoutAnimationListener() Returns the animation listener to which layout animation events are sent.
int	getLayoutMode() Returns the basis of alignment during layout operations on this ViewGroup: either `LAYOUT_MODE_CLIP_BOUNDS` or `LAYOUT_MODE_OPTICAL_BOUNDS`.
LayoutTransition	getLayoutTransition() Gets the LayoutTransition object for this ViewGroup.
int	getNestedScrollAxes() Return the current axes of nested scrolling for this ViewGroup.
ViewGroupOverlay	getOverlay() Returns the ViewGroupOverlay for this view group, creating it if it does not yet exist.
int	getPersistentDrawingCache() Returns an integer indicating what types of drawing caches are kept in memory.
boolean	getTouchscreenBlocksFocus() Check whether this ViewGroup should ignore focus requests for itself and its children.
boolean	hasFocus() Returns true if this view has or contains focus
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
boolean	hasTransientState() Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the framework should take special note to preserve when possible.
int	indexOfChild(View child) Returns the position in the group of the specified child view.
final void	invalidateChild(View child, Rect dirty) Don't call or override this method.
ViewParent	invalidateChildInParent(int[] location, Rect dirty) Don't call or override this method.
boolean	isAlwaysDrawnWithCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer have their caching behavior disabled by parents.
boolean	isAnimationCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Caching behavior of children may be controlled through `setLayerType(int, Paint)`.
boolean	isChildrenDrawingOrderEnabled() Indicates whether the ViewGroup is drawing its children in the order defined by `getChildDrawingOrder(int, int)`.
boolean	isChildrenDrawnWithCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer be forced to cache their rendering state by their parents. Use `setLayerType(int, Paint)` on individual Views instead.
boolean	isMotionEventSplittingEnabled() Returns true if MotionEvents dispatched to this ViewGroup can be split to multiple children.
boolean	isTransitionGroup() Returns true if this ViewGroup should be considered as a single entity for removal when executing an Activity transition.
void	jumpDrawablesToCurrentState() Call `Drawable.jumpToCurrentState()` on all Drawable objects associated with this view.
final void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
void	measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding.
void	measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding and margins.
void	measureChildren(int widthMeasureSpec, int heightMeasureSpec) Ask all of the children of this view to measure themselves, taking into account both the MeasureSpec requirements for this view and its padding.
void	notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) Notifies a view parent that the accessibility state of one of its descendants has changed and that the structure of the subtree is different.
final void	offsetDescendantRectToMyCoords(View descendant, Rect rect) Offset a rectangle that is in a descendant's coordinate space into our coordinate space.
final void	offsetRectIntoDescendantCoords(View descendant, Rect rect) Offset a rectangle that is in our coordinate space into an ancestor's coordinate space.
void	onAttachedToWindow() This is called when the view is attached to a window.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
boolean	onInterceptHoverEvent(MotionEvent event) Implement this method to intercept hover events before they are handled by child views.
boolean	onInterceptTouchEvent(MotionEvent ev) Implement this method to intercept all touch screen motion events.
abstract void	onLayout(boolean changed, int l, int t, int r, int b) Called from layout when this view should assign a size and position to each of its children.
boolean	onNestedFling(View target, float velocityX, float velocityY, boolean consumed) Request a fling from a nested scroll.
boolean	onNestedPreFling(View target, float velocityX, float velocityY) React to a nested fling before the target view consumes it.
boolean	onNestedPrePerformAccessibilityAction(View target, int action, Bundle args) React to an accessibility action delegated by a target descendant view before the target processes it. Subclasses should always call `super.onNestedPrePerformAccessibilityAction`
void	onNestedPreScroll(View target, int dx, int dy, int[] consumed) React to a nested scroll in progress before the target view consumes a portion of the scroll.
void	onNestedScroll(View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) React to a nested scroll in progress.
void	onNestedScrollAccepted(View child, View target, int axes) React to the successful claiming of a nested scroll operation.
boolean	onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) Look for a descendant to call `requestFocus()` on.
boolean	onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) Called when a child has requested sending an `AccessibilityEvent` and gives an opportunity to its parent to augment the event.
boolean	onStartNestedScroll(View child, View target, int nestedScrollAxes) React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.
void	onStopNestedScroll(View child) React to a nested scroll operation ending.
void	onViewAdded(View child) Called when a new child is added to this ViewGroup.
void	onViewRemoved(View child) Called when a child view is removed from this ViewGroup.
void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
void	removeAllViews() Call this method to remove all child views from the ViewGroup.
void	removeAllViewsInLayout() Called by a ViewGroup subclass to remove child views from itself, when it must first know its size on screen before it can calculate how many child views it will render.
void	removeDetachedView(View child, boolean animate) Finishes the removal of a detached view.
void	removeView(View view) Note: do not invoke this method from `draw(android.graphics.Canvas)`, `onDraw(android.graphics.Canvas)`, `dispatchDraw(android.graphics.Canvas)` or any related method.
void	removeViewAt(int index) Removes the view at the specified position in the group.
void	removeViewInLayout(View view) Removes a view during layout.
void	removeViews(int start, int count) Removes the specified range of views from the group.
void	removeViewsInLayout(int start, int count) Removes a range of views during layout.
void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. Looks for a view to give focus to respecting the setting specified by `getDescendantFocusability()`.
boolean	requestSendAccessibilityEvent(View child, AccessibilityEvent event) Called by a child to request from its parent to send an `AccessibilityEvent`.
void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
void	scheduleLayoutAnimation() Schedules the layout animation to be played after the next layout pass of this view group.
void	setAddStatesFromChildren(boolean addsStates) Sets whether this ViewGroup's drawable states also include its children's drawable states.
void	setAlwaysDrawnWithCacheEnabled(boolean always) This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer have their caching behavior disabled by parents.
void	setAnimationCacheEnabled(boolean enabled) This method was deprecated in API level 23. As of `M`, this property is ignored. Caching behavior of children may be controlled through `setLayerType(int, Paint)`.
void	setChildrenDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache for each child of this view group.
void	setChildrenDrawingOrderEnabled(boolean enabled) Tells the ViewGroup whether to draw its children in the order defined by the method `getChildDrawingOrder(int, int)`.
void	setChildrenDrawnWithCacheEnabled(boolean enabled) This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer be forced to cache their rendering state by their parents. Use `setLayerType(int, Paint)` on individual Views instead.
void	setClipChildren(boolean clipChildren) By default, children are clipped to their bounds before drawing.
void	setClipToPadding(boolean clipToPadding) Sets whether this ViewGroup will clip its children to its padding and resize (but not clip) any EdgeEffect to the padded region, if padding is present.
void	setDescendantFocusability(int focusability) Set the descendant focusability of this view group.
void	setLayoutAnimation(LayoutAnimationController controller) Sets the layout animation controller used to animate the group's children after the first layout.
void	setLayoutAnimationListener(Animation.AnimationListener animationListener) Specifies the animation listener to which layout animation events must be sent.
void	setLayoutMode(int layoutMode) Sets the basis of alignment during the layout of this ViewGroup.
void	setLayoutTransition(LayoutTransition transition) Sets the LayoutTransition object for this ViewGroup.
void	setMotionEventSplittingEnabled(boolean split) Enable or disable the splitting of MotionEvents to multiple children during touch event dispatch.
void	setOnHierarchyChangeListener(ViewGroup.OnHierarchyChangeListener listener) Register a callback to be invoked when a child is added to or removed from this view.
void	setPersistentDrawingCache(int drawingCacheToKeep) Indicates what types of drawing caches should be kept in memory after they have been created.
void	setStaticTransformationsEnabled(boolean enabled) When this property is set to true, this ViewGroup supports static transformations on children; this causes `getChildStaticTransformation(View, android.view.animation.Transformation)` to be invoked when a child is drawn.
void	setTouchscreenBlocksFocus(boolean touchscreenBlocksFocus) Set whether this ViewGroup should ignore focus requests for itself and its children.
void	setTransitionGroup(boolean isTransitionGroup) Changes whether or not this ViewGroup should be treated as a single entity during Activity Transitions.
boolean	shouldDelayChildPressedState() Return true if the pressed state should be delayed for children or descendants of this ViewGroup.
boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback) Start an action mode for the specified view with the default type `TYPE_PRIMARY`.
ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback, int type) Start an action mode of a specific type for the specified view.
void	startLayoutAnimation() Runs the layout animation.
void	startViewTransition(View view) This method tells the ViewGroup that the given View object, which should have this ViewGroup as its parent, should be kept around (re-displayed when the ViewGroup draws its children) even if it is removed from its parent.
void	updateViewLayout(View view, ViewGroup.LayoutParams params)

From class android.view.View

void	addChildrenForAccessibility(ArrayList<View> outChildren) Adds the children of this View relevant for accessibility to the given list as output.
void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addFocusables(ArrayList<View> views, int direction) Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Add a listener for attach state changes.
void	addOnLayoutChangeListener(View.OnLayoutChangeListener listener) Add a listener that will be called when the bounds of the view change due to layout processing.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
ViewPropertyAnimator	animate() This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
void	announceForAccessibility(CharSequence text) Convenience method for sending a `TYPE_ANNOUNCEMENT` `AccessibilityEvent` to make an announcement which is related to some sort of a context change for which none of the events representing UI transitions is a good fit.
boolean	awakenScrollBars(int startDelay) Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay, boolean invalidate) Trigger the scrollbars to draw.
boolean	awakenScrollBars() Trigger the scrollbars to draw.
void	bringToFront() Change the view's z order in the tree, so it's on top of other sibling views.
void	buildDrawingCache() Calling this method is equivalent to calling `buildDrawingCache(false)`.
void	buildDrawingCache(boolean autoScale) Forces the drawing cache to be built if the drawing cache is invalid.
void	buildLayer() Forces this view's layer to be created and this view to be rendered into its layer.
boolean	callOnClick() Directly call any attached OnClickListener.
boolean	canResolveLayoutDirection() Check if layout direction resolution can be done.
boolean	canResolveTextAlignment() Check if text alignment resolution can be done.
boolean	canResolveTextDirection() Check if text direction resolution can be done.
boolean	canScrollHorizontally(int direction) Check if this view can be scrolled horizontally in a certain direction.
boolean	canScrollVertically(int direction) Check if this view can be scrolled vertically in a certain direction.
void	cancelLongPress() Cancels a pending long press.
final void	cancelPendingInputEvents() Cancel any deferred high-level input events that were previously posted to the event queue.
boolean	checkInputConnectionProxy(View view) Called by the `InputMethodManager` when a view who is not the current input connection target is trying to make a call on the manager.
void	clearAnimation() Cancels any animations for this view.
void	clearFocus() Called when this view wants to give up focus.
static int	combineMeasuredStates(int curState, int newState) Merge two states as returned by `getMeasuredState()`.
int	computeHorizontalScrollExtent() Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollOffset() Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollRange() Compute the horizontal range that the horizontal scrollbar represents.
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
WindowInsets	computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets) Compute insets that should be consumed by this view and the ones that should propagate to those under it.
int	computeVerticalScrollExtent() Compute the vertical extent of the vertical scrollbar's thumb within the vertical range.
int	computeVerticalScrollOffset() Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.
int	computeVerticalScrollRange() Compute the vertical range that the vertical scrollbar represents.
AccessibilityNodeInfo	createAccessibilityNodeInfo() Returns an `AccessibilityNodeInfo` representing this view from the point of view of an `AccessibilityService`.
void	createContextMenu(ContextMenu menu) Show the context menu for this view.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
WindowInsets	dispatchApplyWindowInsets(WindowInsets insets) Request to apply the given window insets to this view or another view in its subtree.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
boolean	dispatchDragEvent(DragEvent event) Detects if this View is enabled and has a drag event listener.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchDrawableHotspotChanged(float x, float y) Dispatches drawableHotspotChanged to all of this View's children.
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchGenericMotionEvent(MotionEvent event) Dispatch a generic motion event.
boolean	dispatchGenericPointerEvent(MotionEvent event) Dispatch a generic motion event to the view under the first pointer.
boolean	dispatchHoverEvent(MotionEvent event) Dispatch a hover event.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
boolean	dispatchNestedFling(float velocityX, float velocityY, boolean consumed) Dispatch a fling to a nested scrolling parent.
boolean	dispatchNestedPreFling(float velocityX, float velocityY) Dispatch a fling to a nested scrolling parent before it is processed by this view.
boolean	dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments) Report an accessibility action to this view's parents for delegated processing.
boolean	dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress before this view consumes any portion of it.
boolean	dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress.
boolean	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` first and then to its children for adding their text content to the event.
void	dispatchProvideStructure(ViewStructure structure) Dispatch creation of `ViewStructure` down the hierarchy.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(android.util.SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(android.util.SparseArray)` to store the state for this view and its children.
void	dispatchSetActivated(boolean activated) Dispatch setActivated to all of this View's children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchSystemUiVisibilityChanged(int visibility) Dispatch callbacks to `setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener)` down the view hierarchy.
boolean	dispatchTouchEvent(MotionEvent event) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowSystemUiVisiblityChanged(int visible) Dispatch callbacks to `onWindowSystemUiVisibilityChanged(int)` down the view hierarchy.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
void	drawableHotspotChanged(float x, float y) This function is called whenever the view hotspot changes and needs to be propagated to drawables or child views managed by the view.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
final View	findViewById(int id) Look for a child view with the given id.
final View	findViewWithTag(Object tag) Look for a child view with the given tag.
void	findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) Finds the Views that contain given text.
boolean	fitSystemWindows(Rect insets) This method was deprecated in API level 20. As of API 20 use `dispatchApplyWindowInsets(WindowInsets)` to apply insets to views. Views should override `onApplyWindowInsets(WindowInsets)` or use `setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)` to implement handling their own insets.
View	focusSearch(int direction) Find the nearest view in the specified direction that can take focus.
void	forceLayout() Forces this view to be laid out during the next layout pass.
static int	generateViewId() Generate a value suitable for use in `setId(int)`.
CharSequence	getAccessibilityClassName() Return the class name of this object to be used for accessibility purposes.
int	getAccessibilityLiveRegion() Gets the live region mode for this View.
AccessibilityNodeProvider	getAccessibilityNodeProvider() Gets the provider for managing a virtual view hierarchy rooted at this View and reported to `AccessibilityService`s that explore the window content.
int	getAccessibilityTraversalAfter() Gets the id of a view after which this one is visited in accessibility traversal.
int	getAccessibilityTraversalBefore() Gets the id of a view before which this one is visited in accessibility traversal.
float	getAlpha() The opacity of the view.
Animation	getAnimation() Get the animation currently associated with this view.
IBinder	getApplicationWindowToken() Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to.
Drawable	getBackground() Gets the background drawable
ColorStateList	getBackgroundTintList() Return the tint applied to the background drawable, if specified.
PorterDuff.Mode	getBackgroundTintMode() Return the blending mode used to apply the tint to the background drawable, if specified.
int	getBaseline() Return the offset of the widget's text baseline from the widget's top boundary.
final int	getBottom() Bottom position of this view relative to its parent.
float	getBottomFadingEdgeStrength() Returns the strength, or intensity, of the bottom faded edge.
int	getBottomPaddingOffset() Amount by which to extend the bottom fading region.
float	getCameraDistance() Gets the distance along the Z axis from the camera to this view.
Rect	getClipBounds() Returns a copy of the current `clipBounds`.
boolean	getClipBounds(Rect outRect) Populates an output rectangle with the clip bounds of the view, returning `true` if successful or `false` if the view's clip bounds are `null`.
final boolean	getClipToOutline() Returns whether the Outline should be used to clip the contents of the View.
CharSequence	getContentDescription() Gets the `View` description.
final Context	getContext() Returns the context the view is running in, through which it can access the current theme, resources, etc.
ContextMenu.ContextMenuInfo	getContextMenuInfo() Views should implement this if they have extra information to associate with the context menu.
static int	getDefaultSize(int size, int measureSpec) Utility to return a default size.
Display	getDisplay() Gets the logical display to which the view's window has been attached.
final int[]	getDrawableState() Return an array of resource IDs of the drawable states representing the current state of the view.
Bitmap	getDrawingCache(boolean autoScale) Returns the bitmap in which this view drawing is cached.
Bitmap	getDrawingCache() Calling this method is equivalent to calling `getDrawingCache(false)`.
int	getDrawingCacheBackgroundColor()
int	getDrawingCacheQuality() Returns the quality of the drawing cache.
void	getDrawingRect(Rect outRect) Return the visible drawing bounds of your view.
long	getDrawingTime() Return the time at which the drawing of the view hierarchy started.
float	getElevation() The base elevation of this view relative to its parent, in pixels.
boolean	getFilterTouchesWhenObscured() Gets whether the framework should discard touches when the view's window is obscured by another visible window.
boolean	getFitsSystemWindows() Check for state of `setFitsSystemWindows(boolean)`.
ArrayList<View>	getFocusables(int direction) Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.
void	getFocusedRect(Rect r) When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method.
Drawable	getForeground() Returns the drawable used as the foreground of this View.
int	getForegroundGravity() Describes how the foreground is positioned.
ColorStateList	getForegroundTintList() Return the tint applied to the foreground drawable, if specified.
PorterDuff.Mode	getForegroundTintMode() Return the blending mode used to apply the tint to the foreground drawable, if specified.
boolean	getGlobalVisibleRect(Rect r, Point globalOffset) If some part of this view is not clipped by any of its parents, then return that area in r in global (root) coordinates.
final boolean	getGlobalVisibleRect(Rect r)
Handler	getHandler()
final int	getHeight() Return the height of your view.
void	getHitRect(Rect outRect) Hit rectangle in parent's coordinates
int	getHorizontalFadingEdgeLength() Returns the size of the horizontal faded edges used to indicate that more content in this view is visible.
int	getHorizontalScrollbarHeight() Returns the height of the horizontal scrollbar.
int	getId() Returns this view's identifier.
int	getImportantForAccessibility() Gets the mode for determining whether this View is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.
boolean	getKeepScreenOn() Returns whether the screen should remain on, corresponding to the current value of `KEEP_SCREEN_ON`.
KeyEvent.DispatcherState	getKeyDispatcherState() Return the global `KeyEvent.DispatcherState` for this view's window.
int	getLabelFor() Gets the id of a view for which this view serves as a label for accessibility purposes.
int	getLayerType() Indicates what type of layer is currently associated with this view.
int	getLayoutDirection() Returns the resolved layout direction for this view.
ViewGroup.LayoutParams	getLayoutParams() Get the LayoutParams associated with this view.
final int	getLeft() Left position of this view relative to its parent.
float	getLeftFadingEdgeStrength() Returns the strength, or intensity, of the left faded edge.
int	getLeftPaddingOffset() Amount by which to extend the left fading region.
final boolean	getLocalVisibleRect(Rect r)
void	getLocationInWindow(int[] location) Computes the coordinates of this view in its window.
void	getLocationOnScreen(int[] location) Computes the coordinates of this view on the screen.
Matrix	getMatrix() The transform matrix of this view, which is calculated based on the current rotation, scale, and pivot properties.
final int	getMeasuredHeight() Like `getMeasuredHeightAndState()`, but only returns the raw width component (that is the result is masked by `MEASURED_SIZE_MASK`).
final int	getMeasuredHeightAndState() Return the full height measurement information for this view as computed by the most recent call to `measure(int, int)`.
final int	getMeasuredState() Return only the state bits of `getMeasuredWidthAndState()` and `getMeasuredHeightAndState()`, combined into one integer.
final int	getMeasuredWidth() Like `getMeasuredWidthAndState()`, but only returns the raw width component (that is the result is masked by `MEASURED_SIZE_MASK`).
final int	getMeasuredWidthAndState() Return the full width measurement information for this view as computed by the most recent call to `measure(int, int)`.
int	getMinimumHeight() Returns the minimum height of the view.
int	getMinimumWidth() Returns the minimum width of the view.
int	getNextFocusDownId() Gets the id of the view to use when the next focus is `FOCUS_DOWN`.
int	getNextFocusForwardId() Gets the id of the view to use when the next focus is `FOCUS_FORWARD`.
int	getNextFocusLeftId() Gets the id of the view to use when the next focus is `FOCUS_LEFT`.
int	getNextFocusRightId() Gets the id of the view to use when the next focus is `FOCUS_RIGHT`.
int	getNextFocusUpId() Gets the id of the view to use when the next focus is `FOCUS_UP`.
View.OnFocusChangeListener	getOnFocusChangeListener() Returns the focus-change callback registered for this view.
ViewOutlineProvider	getOutlineProvider() Returns the current `ViewOutlineProvider` of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.
int	getOverScrollMode() Returns the over-scroll mode for this view.
ViewOverlay	getOverlay() Returns the overlay for this view, creating it if it does not yet exist.
int	getPaddingBottom() Returns the bottom padding of this view.
int	getPaddingEnd() Returns the end padding of this view depending on its resolved layout direction.
int	getPaddingLeft() Returns the left padding of this view.
int	getPaddingRight() Returns the right padding of this view.
int	getPaddingStart() Returns the start padding of this view depending on its resolved layout direction.
int	getPaddingTop() Returns the top padding of this view.
final ViewParent	getParent() Gets the parent of this view.
ViewParent	getParentForAccessibility() Gets the parent for accessibility purposes.
float	getPivotX() The x location of the point around which the view is `rotated` and `scaled`.
float	getPivotY() The y location of the point around which the view is `rotated` and `scaled`.
Resources	getResources() Returns the resources associated with this view.
final int	getRight() Right position of this view relative to its parent.
float	getRightFadingEdgeStrength() Returns the strength, or intensity, of the right faded edge.
int	getRightPaddingOffset() Amount by which to extend the right fading region.
View	getRootView() Finds the topmost view in the current view hierarchy.
WindowInsets	getRootWindowInsets() Provide original WindowInsets that are dispatched to the view hierarchy.
float	getRotation() The degrees that the view is rotated around the pivot point.
float	getRotationX() The degrees that the view is rotated around the horizontal axis through the pivot point.
float	getRotationY() The degrees that the view is rotated around the vertical axis through the pivot point.
float	getScaleX() The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
float	getScaleY() The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height.
int	getScrollBarDefaultDelayBeforeFade() Returns the delay before scrollbars fade.
int	getScrollBarFadeDuration() Returns the scrollbar fade duration.
int	getScrollBarSize() Returns the scrollbar size.
int	getScrollBarStyle() Returns the current scrollbar style.
int	getScrollIndicators() Returns a bitmask representing the enabled scroll indicators.
final int	getScrollX() Return the scrolled left position of this view.
final int	getScrollY() Return the scrolled top position of this view.
int	getSolidColor() Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges.
StateListAnimator	getStateListAnimator() Returns the current StateListAnimator if exists.
int	getSuggestedMinimumHeight() Returns the suggested minimum height that the view should use.
int	getSuggestedMinimumWidth() Returns the suggested minimum width that the view should use.
int	getSystemUiVisibility() Returns the last `setSystemUiVisibility(int)` that this view has requested.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
Object	getTag() Returns this view's tag.
int	getTextAlignment() Return the resolved text alignment.
int	getTextDirection() Return the resolved text direction.
final int	getTop() Top position of this view relative to its parent.
float	getTopFadingEdgeStrength() Returns the strength, or intensity, of the top faded edge.
int	getTopPaddingOffset() Amount by which to extend the top fading region.
TouchDelegate	getTouchDelegate() Gets the TouchDelegate for this View.
ArrayList<View>	getTouchables() Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself.
String	getTransitionName() Returns the name of the View to be used to identify Views in Transitions.
float	getTranslationX() The horizontal location of this view relative to its `left` position.
float	getTranslationY() The vertical location of this view relative to its `top` position.
float	getTranslationZ() The depth location of this view relative to its `elevation`.
int	getVerticalFadingEdgeLength() Returns the size of the vertical faded edges used to indicate that more content in this view is visible.
int	getVerticalScrollbarPosition()
int	getVerticalScrollbarWidth() Returns the width of the vertical scrollbar.
ViewTreeObserver	getViewTreeObserver() Returns the ViewTreeObserver for this view's hierarchy.
int	getVisibility() Returns the visibility status for this view.
final int	getWidth() Return the width of the your view.
int	getWindowAttachCount()
WindowId	getWindowId() Retrieve the `WindowId` for the window this view is currently attached to.
int	getWindowSystemUiVisibility() Returns the current system UI visibility that is currently set for the entire window.
IBinder	getWindowToken() Retrieve a unique token identifying the window this view is attached to.
int	getWindowVisibility() Returns the current visibility of the window this view is attached to (either `GONE`, `INVISIBLE`, or `VISIBLE`).
void	getWindowVisibleDisplayFrame(Rect outRect) Retrieve the overall visible display size in which the window this view is attached to has been positioned in.
float	getX() The visual x position of this view, in pixels.
float	getY() The visual y position of this view, in pixels.
float	getZ() The visual z position of this view, in pixels.
boolean	hasFocus() Returns true if this view has focus itself, or is the ancestor of the view that has focus.
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
boolean	hasNestedScrollingParent() Returns true if this view has a nested scrolling parent.
boolean	hasOnClickListeners() Return whether this view has an attached OnClickListener.
boolean	hasOverlappingRendering() Returns whether this View has content which overlaps.
boolean	hasTransientState() Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the framework should take special note to preserve when possible.
boolean	hasWindowFocus() Returns true if this view is in a window that currently has window focus.
static View	inflate(Context context, int resource, ViewGroup root) Inflate a view from an XML resource.
void	invalidate(Rect dirty) Mark the area defined by dirty as needing to be drawn.
void	invalidate(int l, int t, int r, int b) Mark the area defined by the rect (l,t,r,b) as needing to be drawn.
void	invalidate() Invalidate the whole view.
void	invalidateDrawable(Drawable drawable) Invalidates the specified Drawable.
void	invalidateOutline() Called to rebuild this View's Outline from its `outline provider`
boolean	isAccessibilityFocused() Returns whether this View is accessibility focused.
boolean	isActivated() Indicates the activation state of this view.
boolean	isAttachedToWindow() Returns true if this view is currently attached to a window.
boolean	isClickable() Indicates whether this view reacts to click events or not.
boolean	isContextClickable() Indicates whether this view reacts to context clicks or not.
boolean	isDirty() True if this view has changed since the last time being drawn.
boolean	isDrawingCacheEnabled() Indicates whether the drawing cache is enabled for this view.
boolean	isDuplicateParentStateEnabled() Indicates whether this duplicates its drawable state from its parent.
boolean	isEnabled() Returns the enabled status for this view.
final boolean	isFocusable() Returns whether this View is able to take focus.
final boolean	isFocusableInTouchMode() When a view is focusable, it may not want to take focus when in touch mode.
boolean	isFocused() Returns true if this view has focus
boolean	isHapticFeedbackEnabled()
boolean	isHardwareAccelerated() Indicates whether this view is attached to a hardware accelerated window or not.
boolean	isHorizontalFadingEdgeEnabled() Indicate whether the horizontal edges are faded when the view is scrolled horizontally.
boolean	isHorizontalScrollBarEnabled() Indicate whether the horizontal scrollbar should be drawn or not.
boolean	isHovered() Returns true if the view is currently hovered.
boolean	isImportantForAccessibility() Computes whether this view should be exposed for accessibility.
boolean	isInEditMode() Indicates whether this View is currently in edit mode.
boolean	isInLayout() Returns whether the view hierarchy is currently undergoing a layout pass.
boolean	isInTouchMode() Returns whether the device is currently in touch mode.
boolean	isLaidOut() Returns true if this view has been through at least one layout since it was last attached to or detached from a window.
boolean	isLayoutDirectionResolved()
boolean	isLayoutRequested() Indicates whether or not this view's layout will be requested during the next hierarchy layout pass.
boolean	isLongClickable() Indicates whether this view reacts to long click events or not.
boolean	isNestedScrollingEnabled() Returns true if nested scrolling is enabled for this view.
boolean	isOpaque() Indicates whether this View is opaque.
boolean	isPaddingOffsetRequired() If the View draws content inside its padding and enables fading edges, it needs to support padding offsets.
boolean	isPaddingRelative() Return if the padding has been set through relative values `setPaddingRelative(int, int, int, int)` or through
boolean	isPressed() Indicates whether the view is currently in pressed state.
boolean	isSaveEnabled() Indicates whether this view will save its state (that is, whether its `onSaveInstanceState()` method will be called).
boolean	isSaveFromParentEnabled() Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
boolean	isScrollContainer() Indicates whether this view is one of the set of scrollable containers in its window.
boolean	isScrollbarFadingEnabled() Returns true if scrollbars will fade when this view is not scrolling
boolean	isSelected() Indicates the selection state of this view.
boolean	isShown() Returns the visibility of this view and all of its ancestors
boolean	isSoundEffectsEnabled()
boolean	isTextAlignmentResolved()
boolean	isTextDirectionResolved()
boolean	isVerticalFadingEdgeEnabled() Indicate whether the vertical edges are faded when the view is scrolled horizontally.
boolean	isVerticalScrollBarEnabled() Indicate whether the vertical scrollbar should be drawn or not.
void	jumpDrawablesToCurrentState() Call `Drawable.jumpToCurrentState()` on all Drawable objects associated with this view.
void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
final void	measure(int widthMeasureSpec, int heightMeasureSpec) This is called to find out how big a view should be.
static int[]	mergeDrawableStates(int[] baseState, int[] additionalState) Merge your own state values in `additionalState` into the base state values `baseState` that were returned by `onCreateDrawableState(int)`.
void	offsetLeftAndRight(int offset) Offset this view's horizontal location by the specified amount of pixels.
void	offsetTopAndBottom(int offset) Offset this view's vertical location by the specified number of pixels.
void	onAnimationEnd() Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view.
void	onAnimationStart() Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view.
WindowInsets	onApplyWindowInsets(WindowInsets insets) Called when the view should apply `WindowInsets` according to its internal policy.
void	onAttachedToWindow() This is called when the view is attached to a window.
void	onCancelPendingInputEvents() Called as the result of a call to `cancelPendingInputEvents()` on this view or a parent view.
boolean	onCheckIsTextEditor() Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it.
void	onConfigurationChanged(Configuration newConfig) Called when the current configuration of the resources being used by the application have changed.
void	onCreateContextMenu(ContextMenu menu) Views should implement this if the view itself is going to add items to the context menu.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
void	onDisplayHint(int hint) Gives this view a hint about whether is displayed or not.
boolean	onDragEvent(DragEvent event) Handles drag events sent by the system following a call to `startDrag()`.
void	onDraw(Canvas canvas) Implement this to do your drawing.
void	onDrawForeground(Canvas canvas) Draw any foreground content for this view.
final void	onDrawScrollBars(Canvas canvas) Request the drawing of the horizontal and the vertical scrollbar.
boolean	onFilterTouchEventForSecurity(MotionEvent event) Filter the touch event to apply security policies.
void	onFinishInflate() Finalize inflating a view from XML.
void	onFinishTemporaryDetach() Called after `onStartTemporaryDetach()` when the container is done changing the view.
void	onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
boolean	onGenericMotionEvent(MotionEvent event) Implement this method to handle generic motion events.
void	onHoverChanged(boolean hovered) Implement this method to handle hover state changes.
boolean	onHoverEvent(MotionEvent event) Implement this method to handle hover events.
void	onInitializeAccessibilityEvent(AccessibilityEvent event) Initializes an `AccessibilityEvent` with information about this View which is the event source.
void	onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) Initializes an `AccessibilityNodeInfo` with information about this view.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyDown()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyLongPress(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyLongPress()`: always returns false (doesn't handle the event).
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: always returns false (doesn't handle the event).
boolean	onKeyPreIme(int keyCode, KeyEvent event) Handle a key event before it is processed by any input method associated with the view hierarchy.
boolean	onKeyShortcut(int keyCode, KeyEvent event) Called on the focused view when a key shortcut event is not handled.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyUp()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
void	onLayout(boolean changed, int left, int top, int right, int bottom) Called from layout when this view should assign a size and position to each of its children.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by `overScrollBy(int, int, int, int, int, int, int, int, boolean)` to respond to the results of an over-scroll operation.
void	onPopulateAccessibilityEvent(AccessibilityEvent event) Called from `dispatchPopulateAccessibilityEvent(AccessibilityEvent)` giving a chance to this View to populate the accessibility event with its text content.
void	onProvideStructure(ViewStructure structure) Called when assist structure is being retrieved from a view as part of `Activity.onProvideAssistData`.
void	onProvideVirtualStructure(ViewStructure structure) Called when assist structure is being retrieved from a view as part of `Activity.onProvideAssistData` to generate additional virtual structure under this view.
void	onRestoreInstanceState(Parcelable state) Hook allowing a view to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
void	onRtlPropertiesChanged(int layoutDirection) Called when any RTL property (layout direction or text direction or text alignment) has been changed.
Parcelable	onSaveInstanceState() Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state.
void	onScreenStateChanged(int screenState) This method is called whenever the state of the screen this view is attached to changes.
void	onScrollChanged(int l, int t, int oldl, int oldt) This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).
boolean	onSetAlpha(int alpha) Invoked if there is a Transform that involves alpha.
void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.
void	onStartTemporaryDetach() This is called when a container is going to temporarily detach a child, with `ViewGroup.detachViewFromParent`.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent event) Implement this method to handle trackball motion events.
void	onVisibilityChanged(View changedView, int visibility) Called when the visibility of the view or an ancestor of the view has changed.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
void	onWindowSystemUiVisibilityChanged(int visible) Override to find out when the window's requested system UI visibility has changed, that is the value returned by `getWindowSystemUiVisibility()`.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between `GONE`, `INVISIBLE`, and `VISIBLE`).
boolean	overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) Scroll the view with standard behavior for scrolling beyond the normal content boundaries.
boolean	performAccessibilityAction(int action, Bundle arguments) Performs the specified accessibility action on the view.
boolean	performClick() Call this view's OnClickListener, if it is defined.
boolean	performContextClick() Call this view's OnContextClickListener, if it is defined.
boolean	performHapticFeedback(int feedbackConstant) BZZZTT!!1! Provide haptic feedback to the user for this view.
boolean	performHapticFeedback(int feedbackConstant, int flags) BZZZTT!!1! Like `performHapticFeedback(int)`, with additional options.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	playSoundEffect(int soundConstant) Play a sound effect for this view.
boolean	post(Runnable action) Causes the Runnable to be added to the message queue.
boolean	postDelayed(Runnable action, long delayMillis) Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses.
void	postInvalidate(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidate() Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds) Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateOnAnimation(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on the next animation time step, typically the next display frame.
void	postInvalidateOnAnimation() Cause an invalidate to happen on the next animation time step, typically the next display frame.
void	postOnAnimation(Runnable action) Causes the Runnable to execute on the next animation time step.
void	postOnAnimationDelayed(Runnable action, long delayMillis) Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses.
void	refreshDrawableState() Call this to force a view to update its drawable state.
boolean	removeCallbacks(Runnable action) Removes the specified Runnable from the message queue.
void	removeOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Remove a listener for attach state changes.
void	removeOnLayoutChangeListener(View.OnLayoutChangeListener listener) Remove a listener for layout changes.
void	requestApplyInsets() Ask that a new dispatch of `onApplyWindowInsets(WindowInsets)` be performed.
void	requestFitSystemWindows() This method was deprecated in API level 20. Use `requestApplyInsets()` for newer platform versions.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from.
final boolean	requestFocus(int direction) Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading.
final boolean	requestFocus() Call this to try to give focus to a specific view or to one of its descendants.
final boolean	requestFocusFromTouch() Call this to try to give focus to a specific view or to one of its descendants.
void	requestLayout() Call this when something has changed which has invalidated the layout of this view.
boolean	requestRectangleOnScreen(Rect rectangle) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
boolean	requestRectangleOnScreen(Rect rectangle, boolean immediate) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
final void	requestUnbufferedDispatch(MotionEvent event) Request unbuffered dispatch of the given stream of MotionEvents to this View.
static int	resolveSize(int size, int measureSpec) Version of `resolveSizeAndState(int, int, int)` returning only the `MEASURED_SIZE_MASK` bits of the result.
static int	resolveSizeAndState(int size, int measureSpec, int childMeasuredState) Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec.
void	restoreHierarchyState(SparseArray<Parcelable> container) Restore this view hierarchy's frozen state from the given container.
void	saveHierarchyState(SparseArray<Parcelable> container) Store this view hierarchy's frozen state into the given container.
void	scheduleDrawable(Drawable who, Runnable what, long when) Schedules an action on a drawable to occur at a specified time.
void	scrollBy(int x, int y) Move the scrolled position of your view.
void	scrollTo(int x, int y) Set the scrolled position of your view.
void	sendAccessibilityEvent(int eventType) Sends an accessibility event of the given type.
void	sendAccessibilityEventUnchecked(AccessibilityEvent event) This method behaves exactly as `sendAccessibilityEvent(int)` but takes as an argument an empty `AccessibilityEvent` and does not perform a check whether accessibility is enabled.
void	setAccessibilityDelegate(View.AccessibilityDelegate delegate) Sets a delegate for implementing accessibility support via composition as opposed to inheritance.
void	setAccessibilityLiveRegion(int mode) Sets the live region mode for this view.
void	setAccessibilityTraversalAfter(int afterId) Sets the id of a view after which this one is visited in accessibility traversal.
void	setAccessibilityTraversalBefore(int beforeId) Sets the id of a view before which this one is visited in accessibility traversal.
void	setActivated(boolean activated) Changes the activated state of this view.
void	setAlpha(float alpha) Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.
void	setAnimation(Animation animation) Sets the next animation to play for this view.
void	setBackground(Drawable background) Set the background to a given Drawable, or remove the background.
void	setBackgroundColor(int color) Sets the background color for this view.
void	setBackgroundDrawable(Drawable background) This method was deprecated in API level 16. use `setBackground(Drawable)` instead
void	setBackgroundResource(int resid) Set the background to a given resource.
void	setBackgroundTintList(ColorStateList tint) Applies a tint to the background drawable.
void	setBackgroundTintMode(PorterDuff.Mode tintMode) Specifies the blending mode used to apply the tint specified by `setBackgroundTintList(ColorStateList)`} to the background drawable.
final void	setBottom(int bottom) Sets the bottom position of this view relative to its parent.
void	setCameraDistance(float distance) Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setClipBounds(Rect clipBounds) Sets a rectangular area on this view to which the view will be clipped when it is drawn.
void	setClipToOutline(boolean clipToOutline) Sets whether the View's Outline should be used to clip the contents of the View.
void	setContentDescription(CharSequence contentDescription) Sets the `View` description.
void	setContextClickable(boolean contextClickable) Enables or disables context clicking for this view.
void	setDrawingCacheBackgroundColor(int color) Setting a solid background color for the drawing cache's bitmaps will improve performance and memory usage.
void	setDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache.
void	setDrawingCacheQuality(int quality) Set the drawing cache quality of this view.
void	setDuplicateParentStateEnabled(boolean enabled) Enables or disables the duplication of the parent's state into this view.
void	setElevation(float elevation) Sets the base elevation of this view, in pixels.
void	setEnabled(boolean enabled) Set the enabled state of this view.
void	setFadingEdgeLength(int length) Set the size of the faded edge used to indicate that more content in this view is available.
void	setFilterTouchesWhenObscured(boolean enabled) Sets whether the framework should discard touches when the view's window is obscured by another visible window.
void	setFitsSystemWindows(boolean fitSystemWindows) Sets whether or not this view should account for system screen decorations such as the status bar and inset its content; that is, controlling whether the default implementation of `fitSystemWindows(Rect)` will be executed.
void	setFocusable(boolean focusable) Set whether this view can receive the focus.
void	setFocusableInTouchMode(boolean focusableInTouchMode) Set whether this view can receive focus while in touch mode.
void	setForeground(Drawable foreground) Supply a Drawable that is to be rendered on top of all of the content in the view.
void	setForegroundGravity(int gravity) Describes how the foreground is positioned.
void	setForegroundTintList(ColorStateList tint) Applies a tint to the foreground drawable.
void	setForegroundTintMode(PorterDuff.Mode tintMode) Specifies the blending mode used to apply the tint specified by `setForegroundTintList(ColorStateList)`} to the background drawable.
void	setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) Set whether this view should have haptic feedback for events such as long presses.
void	setHasTransientState(boolean hasTransientState) Set whether this view is currently tracking transient state that the framework should attempt to preserve when possible.
void	setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) Define whether the horizontal edges should be faded when this view is scrolled horizontally.
void	setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) Define whether the horizontal scrollbar should be drawn or not.
void	setHovered(boolean hovered) Sets whether the view is currently hovered.
void	setId(int id) Sets the identifier for this view.
void	setImportantForAccessibility(int mode) Sets how to determine whether this view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.
void	setKeepScreenOn(boolean keepScreenOn) Controls whether the screen should remain on, modifying the value of `KEEP_SCREEN_ON`.
void	setLabelFor(int id) Sets the id of a view for which this view serves as a label for accessibility purposes.
void	setLayerPaint(Paint paint) Updates the `Paint` object used with the current layer (used only if the current layer type is not set to `LAYER_TYPE_NONE`).
void	setLayerType(int layerType, Paint paint) Specifies the type of layer backing this view.
void	setLayoutDirection(int layoutDirection) Set the layout direction for this view.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
final void	setLeft(int left) Sets the left position of this view relative to its parent.
void	setLongClickable(boolean longClickable) Enables or disables long click events for this view.
final void	setMeasuredDimension(int measuredWidth, int measuredHeight) This method must be called by `onMeasure(int, int)` to store the measured width and measured height.
void	setMinimumHeight(int minHeight) Sets the minimum height of the view.
void	setMinimumWidth(int minWidth) Sets the minimum width of the view.
void	setNestedScrollingEnabled(boolean enabled) Enable or disable nested scrolling for this view.
void	setNextFocusDownId(int nextFocusDownId) Sets the id of the view to use when the next focus is `FOCUS_DOWN`.
void	setNextFocusForwardId(int nextFocusForwardId) Sets the id of the view to use when the next focus is `FOCUS_FORWARD`.
void	setNextFocusLeftId(int nextFocusLeftId) Sets the id of the view to use when the next focus is `FOCUS_LEFT`.
void	setNextFocusRightId(int nextFocusRightId) Sets the id of the view to use when the next focus is `FOCUS_RIGHT`.
void	setNextFocusUpId(int nextFocusUpId) Sets the id of the view to use when the next focus is `FOCUS_UP`.
void	setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener listener) Set an `View.OnApplyWindowInsetsListener` to take over the policy for applying window insets to this view.
void	setOnClickListener(View.OnClickListener l) Register a callback to be invoked when this view is clicked.
void	setOnContextClickListener(View.OnContextClickListener l) Register a callback to be invoked when this view is context clicked.
void	setOnCreateContextMenuListener(View.OnCreateContextMenuListener l) Register a callback to be invoked when the context menu for this view is being built.
void	setOnDragListener(View.OnDragListener l) Register a drag event listener callback object for this View.
void	setOnFocusChangeListener(View.OnFocusChangeListener l) Register a callback to be invoked when focus of this view changed.
void	setOnGenericMotionListener(View.OnGenericMotionListener l) Register a callback to be invoked when a generic motion event is sent to this view.
void	setOnHoverListener(View.OnHoverListener l) Register a callback to be invoked when a hover event is sent to this view.
void	setOnKeyListener(View.OnKeyListener l) Register a callback to be invoked when a hardware key is pressed in this view.
void	setOnLongClickListener(View.OnLongClickListener l) Register a callback to be invoked when this view is clicked and held.
void	setOnScrollChangeListener(View.OnScrollChangeListener l) Register a callback to be invoked when the scroll X or Y positions of this view change.
void	setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener l) Set a listener to receive callbacks when the visibility of the system bar changes.
void	setOnTouchListener(View.OnTouchListener l) Register a callback to be invoked when a touch event is sent to this view.
void	setOutlineProvider(ViewOutlineProvider provider) Sets the `ViewOutlineProvider` of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.
void	setOverScrollMode(int overScrollMode) Set the over-scroll mode for this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPaddingRelative(int start, int top, int end, int bottom) Sets the relative padding.
void	setPivotX(float pivotX) Sets the x location of the point around which the view is `rotated` and `scaled`.
void	setPivotY(float pivotY) Sets the y location of the point around which the view is `rotated` and `scaled`.
void	setPressed(boolean pressed) Sets the pressed state for this view.
final void	setRight(int right) Sets the right position of this view relative to its parent.
void	setRotation(float rotation) Sets the degrees that the view is rotated around the pivot point.
void	setRotationX(float rotationX) Sets the degrees that the view is rotated around the horizontal axis through the pivot point.
void	setRotationY(float rotationY) Sets the degrees that the view is rotated around the vertical axis through the pivot point.
void	setSaveEnabled(boolean enabled) Controls whether the saving of this view's state is enabled (that is, whether its `onSaveInstanceState()` method will be called).
void	setSaveFromParentEnabled(boolean enabled) Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
void	setScaleX(float scaleX) Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
void	setScaleY(float scaleY) Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width.
void	setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) Define the delay before scrollbars fade.
void	setScrollBarFadeDuration(int scrollBarFadeDuration) Define the scrollbar fade duration.
void	setScrollBarSize(int scrollBarSize) Define the scrollbar size.
void	setScrollBarStyle(int style) Specify the style of the scrollbars.
void	setScrollContainer(boolean isScrollContainer) Change whether this view is one of the set of scrollable containers in its window.
void	setScrollIndicators(int indicators, int mask) Sets the state of the scroll indicators specified by the mask.
void	setScrollIndicators(int indicators) Sets the state of all scroll indicators.
void	setScrollX(int value) Set the horizontal scrolled position of your view.
void	setScrollY(int value) Set the vertical scrolled position of your view.
void	setScrollbarFadingEnabled(boolean fadeScrollbars) Define whether scrollbars will fade when the view is not scrolling.
void	setSelected(boolean selected) Changes the selection state of this view.
void	setSoundEffectsEnabled(boolean soundEffectsEnabled) Set whether this view should have sound effects enabled for events such as clicking and touching.
void	setStateListAnimator(StateListAnimator stateListAnimator) Attaches the provided StateListAnimator to this View.
void	setSystemUiVisibility(int visibility) Request that the visibility of the status bar or other screen/window decorations be changed.
void	setTag(int key, Object tag) Sets a tag associated with this view and a key.
void	setTag(Object tag) Sets the tag associated with this view.
void	setTextAlignment(int textAlignment) Set the text alignment.
void	setTextDirection(int textDirection) Set the text direction.
final void	setTop(int top) Sets the top position of this view relative to its parent.
void	setTouchDelegate(TouchDelegate delegate) Sets the TouchDelegate for this View.
final void	setTransitionName(String transitionName) Sets the name of the View to be used to identify Views in Transitions.
void	setTranslationX(float translationX) Sets the horizontal location of this view relative to its `left` position.
void	setTranslationY(float translationY) Sets the vertical location of this view relative to its `top` position.
void	setTranslationZ(float translationZ) Sets the depth location of this view relative to its `elevation`.
void	setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) Define whether the vertical edges should be faded when this view is scrolled vertically.
void	setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) Define whether the vertical scrollbar should be drawn or not.
void	setVerticalScrollbarPosition(int position) Set the position of the vertical scroll bar.
void	setVisibility(int visibility) Set the enabled state of this view.
void	setWillNotCacheDrawing(boolean willNotCacheDrawing) When a View's drawing cache is enabled, drawing is redirected to an offscreen bitmap.
void	setWillNotDraw(boolean willNotDraw) If this view doesn't do any drawing on its own, set this flag to allow further optimizations.
void	setX(float x) Sets the visual x position of this view, in pixels.
void	setY(float y) Sets the visual y position of this view, in pixels.
void	setZ(float z) Sets the visual z position of this view, in pixels.
boolean	showContextMenu() Bring up the context menu for this view.
ActionMode	startActionMode(ActionMode.Callback callback, int type) Start an action mode with the given type.
ActionMode	startActionMode(ActionMode.Callback callback) Start an action mode with the default type `TYPE_PRIMARY`.
void	startAnimation(Animation animation) Start the specified animation now.
final boolean	startDrag(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags) Starts a drag and drop operation.
boolean	startNestedScroll(int axes) Begin a nestable scroll operation along the given axes.
void	stopNestedScroll() Stop a nested scroll in progress.
String	toString() Returns a string containing a concise, human-readable description of this object.
void	unscheduleDrawable(Drawable who) Unschedule any events associated with the given Drawable.
void	unscheduleDrawable(Drawable who, Runnable what) Cancels a scheduled action on a drawable.
boolean	verifyDrawable(Drawable who) If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.
boolean	willNotCacheDrawing() Returns whether or not this View can cache its drawing or not.
boolean	willNotDraw() Returns whether or not this View draws on its own.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface android.support.v4.view.ScrollingView

From interface android.support.v4.view.NestedScrollingChild

abstract boolean	dispatchNestedFling(float velocityX, float velocityY, boolean consumed) Dispatch a fling to a nested scrolling parent.
abstract boolean	dispatchNestedPreFling(float velocityX, float velocityY) Dispatch a fling to a nested scrolling parent before it is processed by this view.
abstract boolean	dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress before this view consumes any portion of it.
abstract boolean	dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress.
abstract boolean	hasNestedScrollingParent() Returns true if this view has a nested scrolling parent.
abstract boolean	isNestedScrollingEnabled() Returns true if nested scrolling is enabled for this view.
abstract void	setNestedScrollingEnabled(boolean enabled) Enable or disable nested scrolling for this view.
abstract boolean	startNestedScroll(int axes) Begin a nestable scroll operation along the given axes.
abstract void	stopNestedScroll() Stop a nested scroll in progress.

From interface android.view.ViewParent

abstract void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children.
abstract boolean	canResolveLayoutDirection() Tells if this view parent can resolve the layout direction.
abstract boolean	canResolveTextAlignment() Tells if this view parent can resolve the text alignment.
abstract boolean	canResolveTextDirection() Tells if this view parent can resolve the text direction.
abstract void	childDrawableStateChanged(View child) This method is called on the parent when a child's drawable state has changed.
abstract void	childHasTransientStateChanged(View child, boolean hasTransientState) Called when a child view now has or no longer is tracking transient state.
abstract void	clearChildFocus(View child) Called when a child of this parent is giving up focus
abstract void	createContextMenu(ContextMenu menu) Have the parent populate the specified context menu if it has anything to add (and then recurse on its parent).
abstract View	focusSearch(View v, int direction) Find the nearest view in the specified direction that wants to take focus
abstract void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
abstract boolean	getChildVisibleRect(View child, Rect r, Point offset) Compute the visible part of a rectangular region defined in terms of a child view's coordinates.
abstract int	getLayoutDirection() Return this view parent layout direction.
abstract ViewParent	getParent() Returns the parent if it exists, or null.
abstract ViewParent	getParentForAccessibility() Gets the parent of a given View for accessibility.
abstract int	getTextAlignment() Return this view parent text alignment.
abstract int	getTextDirection() Return this view parent text direction.
abstract void	invalidateChild(View child, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract ViewParent	invalidateChildInParent(int[] location, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract boolean	isLayoutDirectionResolved() Tells if this view parent layout direction is resolved.
abstract boolean	isLayoutRequested() Indicates whether layout was requested on this view parent.
abstract boolean	isTextAlignmentResolved() Tells if this view parent text alignment is resolved.
abstract boolean	isTextDirectionResolved() Tells if this view parent text direction is resolved.
abstract void	notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) Notifies a view parent that the accessibility state of one of its descendants has changed and that the structure of the subtree is different.
abstract boolean	onNestedFling(View target, float velocityX, float velocityY, boolean consumed) Request a fling from a nested scroll.
abstract boolean	onNestedPreFling(View target, float velocityX, float velocityY) React to a nested fling before the target view consumes it.
abstract boolean	onNestedPrePerformAccessibilityAction(View target, int action, Bundle arguments) React to an accessibility action delegated by a target descendant view before the target processes it.
abstract void	onNestedPreScroll(View target, int dx, int dy, int[] consumed) React to a nested scroll in progress before the target view consumes a portion of the scroll.
abstract void	onNestedScroll(View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) React to a nested scroll in progress.
abstract void	onNestedScrollAccepted(View child, View target, int nestedScrollAxes) React to the successful claiming of a nested scroll operation.
abstract boolean	onStartNestedScroll(View child, View target, int nestedScrollAxes) React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.
abstract void	onStopNestedScroll(View target) React to a nested scroll operation ending.
abstract void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
abstract void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
abstract boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
abstract void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
abstract void	requestFitSystemWindows() Ask that a new dispatch of `View.fitSystemWindows(Rect)` be performed.
abstract void	requestLayout() Called when something has changed which has invalidated the layout of a child of this view parent.
abstract boolean	requestSendAccessibilityEvent(View child, AccessibilityEvent event) Called by a child to request from its parent to send an `AccessibilityEvent`.
abstract void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
abstract boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
abstract ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback, int type) Start an action mode of a specific type for the specified view.
abstract ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback) Start an action mode for the specified view with the default type `TYPE_PRIMARY`.

From interface android.view.ViewManager

From interface android.graphics.drawable.Drawable.Callback

From interface android.view.KeyEvent.Callback

From interface android.view.accessibility.AccessibilityEventSource

Constants

public static final int FOCUS_SCROLL_ALIGNED

Always keep focused item at a aligned position. Developer can use WINDOW_ALIGN_XXX and ITEM_ALIGN_XXX to define how focused item is aligned. In this mode, the last focused position will be remembered and restored when focus is back to the view.

Constant Value: 0 (0x00000000)

public static final int FOCUS_SCROLL_ITEM

Scroll to make the focused item inside client area.

Constant Value: 1 (0x00000001)

public static final int FOCUS_SCROLL_PAGE

Scroll a page of items when focusing to item outside the client area. The page size matches the client area size of RecyclerView.

Constant Value: 2 (0x00000002)

public static final float ITEM_ALIGN_OFFSET_PERCENT_DISABLED

Value indicates that percent is not used.

Constant Value: -1.0

public static final int SAVE_ALL_CHILD

Save on screen views plus save off screen child views without any limitation. This might cause out of memory, only use it when you are dealing with limited data.

Constant Value: 3 (0x00000003)

public static final int SAVE_LIMITED_CHILD

Save on screen views plus save off screen child views states up to getSaveChildrenLimitNumber().

Constant Value: 2 (0x00000002)

public static final int SAVE_NO_CHILD

Dont save states of any child views.

Constant Value: 0 (0x00000000)

public static final int SAVE_ON_SCREEN_CHILD

Only save on screen child views, the states are lost when they become off screen.

Constant Value: 1 (0x00000001)

public static final int WINDOW_ALIGN_BOTH_EDGE

The first item and last item are aligned with the two edges of the viewport. When navigating in the middle of list, the focus maintains a middle location.

The middle location is calculated by "windowAlignOffset" and "windowAlignOffsetPercent"; if neither of these two is defined, the default value is 1/2 of the size.

Constant Value: 3 (0x00000003)

public static final int WINDOW_ALIGN_HIGH_EDGE

The last item is aligned with the high edge of the viewport when navigating to the end of list. When navigating away from the end, the focus maintains a middle location.

For HorizontalGridView, high edge refers to right edge when RTL is false or left edge when RTL is true. For VerticalGridView, high edge refers to bottom edge.

The middle location is calculated by "windowAlignOffset" and "windowAlignOffsetPercent"; if neither of these two is defined, the default value is 1/2 of the size.

Constant Value: 2 (0x00000002)

public static final int WINDOW_ALIGN_LOW_EDGE

The first item is aligned with the low edge of the viewport. When navigating away from the first item, the focus maintains a middle location.

For HorizontalGridView, low edge refers to left edge when RTL is false or right edge when RTL is true. For VerticalGridView, low edge refers to top edge.

The middle location is calculated by "windowAlignOffset" and "windowAlignOffsetPercent"; if neither of these two is defined, the default value is 1/2 of the size.

Constant Value: 1 (0x00000001)

public static final int WINDOW_ALIGN_NO_EDGE

The focused item always stays in a middle location.

The middle location is calculated by "windowAlignOffset" and "windowAlignOffsetPercent"; if neither of these two is defined, the default value is 1/2 of the size.

Constant Value: 0 (0x00000000)

public static final float WINDOW_ALIGN_OFFSET_PERCENT_DISABLED

Value indicates that percent is not used.

Constant Value: -1.0

Public Constructors

public HorizontalGridView (Context context)

public HorizontalGridView (Context context, AttributeSet attrs)

public HorizontalGridView (Context context, AttributeSet attrs, int defStyle)

Public Methods

public boolean dispatchGenericFocusedEvent (MotionEvent event)

Dispatch a generic motion event to the currently focused view.

Do not call this method directly. Call dispatchGenericMotionEvent(MotionEvent) instead.

Parameters

event	The motion event to be dispatched.

Returns

True if the event was handled by the view, false otherwise.

public boolean dispatchKeyEvent (KeyEvent event)

Dispatch a key event to the next view on the focus path. This path runs from the top of the view tree down to the currently focused view. If this view has focus, it will dispatch to itself. Otherwise it will dispatch the next node down the focus path. This method also fires any key listeners.

Parameters

event	The key event to be dispatched.

Returns

True if the event was handled, false otherwise.

public boolean dispatchTouchEvent (MotionEvent event)

Pass the touch screen motion event down to the target view, or this view if it is the target.

Parameters

event	The motion event to be dispatched.

Returns

True if the event was handled by the view, false otherwise.

public void draw (Canvas canvas)

Manually render this view (and all of its children) to the given Canvas. The view must have already done a full layout before this function is called. When implementing a view, implement onDraw(android.graphics.Canvas) instead of overriding this method. If you do need to override this method, call the superclass version.

Parameters

canvas	The Canvas to which the View is rendered.

public View focusSearch (int direction)

Find the nearest view in the specified direction that can take focus. This does not actually give focus to that view.

Parameters

direction	One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT

Returns

The nearest focusable in the specified direction, or null if none can be found.

public int getChildDrawingOrder (int childCount, int i)

Returns the index of the child to draw for this iteration. Override this if you want to change the drawing order of children. By default, it returns i.

NOTE: In order for this method to be called, you must enable child ordering first by calling setChildrenDrawingOrderEnabled(boolean).

Parameters

i	The current iteration.

Returns

The index of the child to draw this iteration.

public final boolean getFadingLeftEdge ()

Returns true if left edge fading is enabled.

public final int getFadingLeftEdgeLength ()

Returns the left edge fading length in pixels.

public final int getFadingLeftEdgeOffset ()

Returns the distance in pixels between fading start position and left padding edge. The fading start position is positive when start position is inside left padding area. Default value is 0, means that the fading starts from left padding edge.

public final boolean getFadingRightEdge ()

Returns true if fading right edge is enabled.

public final int getFadingRightEdgeLength ()

Returns the right edge fading length in pixels.

public final int getFadingRightEdgeOffset ()

Sets the distance in pixels between fading start position and right padding edge. The fading start position is positive when start position is inside right padding area. Default value is 0, means that the fading starts from right padding edge.

public int getFocusScrollStrategy ()

Returns the strategy used to scroll in response to item focus changing.

public int getHorizontalMargin ()

Returns the margin in pixels between two child items horizontally.

public int getItemAlignmentOffset ()

Returns the absolute offset in pixels for item alignment.

Returns

The number of pixels to offset. Will be negative for alignment from the high edge, or positive for alignment from the low edge. Default value is 0.

public float getItemAlignmentOffsetPercent ()

Returns the offset percent for item alignment in addition to getItemAlignmentOffset().

Returns

Percentage to offset. E.g., 40 means 40% of the width from the low edge, or ITEM_ALIGN_OFFSET_PERCENT_DISABLED if disabled. Default value is 50.

public int getItemAlignmentViewId ()

Returns the id of the view to align with, or zero for the item view itself.

public BaseGridView.OnUnhandledKeyListener getOnUnhandledKeyListener ()

Returns the unhandled key listener.

public final int getSaveChildrenLimitNumber ()

Returns the limit used when when getSaveChildrenPolicy() is SAVE_LIMITED_CHILD

public final int getSaveChildrenPolicy ()

Returns the policy for saving children.

Returns

policy, one of SAVE_NO_CHILD SAVE_ON_SCREEN_CHILD SAVE_LIMITED_CHILD SAVE_ALL_CHILD.

public int getSelectedPosition ()

Returns the selected item position.

public int getSelectedSubPosition ()

Returns the sub selected item position started from zero. An item can have multiple ItemAlignmentFacets provided by RecyclerView.ViewHolder or FacetProviderAdapter. Zero is returned when no ItemAlignmentFacet is defined.

public int getVerticalMargin ()

Returns the margin in pixels between two child items vertically.

public void getViewSelectedOffsets (View view, int[] offsets)

Returns the x/y offsets to final position from current position if the view is selected.

Parameters

view	The view to get offsets.
offsets	offsets[0] holds offset of X, offsets[1] holds offset of Y.

public int getWindowAlignment ()

Returns the method for focused item alignment in the view.

Returns

WINDOW_ALIGN_BOTH_EDGE, WINDOW_ALIGN_LOW_EDGE, WINDOW_ALIGN_HIGH_EDGE or WINDOW_ALIGN_NO_EDGE.

public int getWindowAlignmentOffset ()

Returns the offset in pixels for window alignment.

Returns

The number of pixels to offset. If the offset is positive, it is distance from low edge (see WINDOW_ALIGN_LOW_EDGE); if the offset is negative, the absolute value is distance from high edge (see WINDOW_ALIGN_HIGH_EDGE). Default value is 0.

public float getWindowAlignmentOffsetPercent ()

Returns the offset percent for window alignment in addition to getWindowAlignmentOffset().

Returns

Percentage to offset. E.g., 40 means 40% of the width from the low edge, or WINDOW_ALIGN_OFFSET_PERCENT_DISABLED if disabled. Default value is 50.

public boolean hasOverlappingRendering ()

Returns whether this View has content which overlaps.

This function, intended to be overridden by specific View types, is an optimization when alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to an offscreen buffer and then composited into place, which can be expensive. If the view has no overlapping rendering, the view can draw each primitive with the appropriate alpha value directly. An example of overlapping rendering is a TextView with a background image, such as a Button. An example of non-overlapping rendering is a TextView with no background, or an ImageView with only the foreground image. The default implementation returns true; subclasses should override if they have cases which can be optimized.

The current implementation of the saveLayer and saveLayerAlpha methods in Canvas necessitates that a View return true if it uses the methods internally without passing the CLIP_TO_LAYER_SAVE_FLAG.

Returns

true if the content in this view might overlap, false otherwise.

public boolean hasPreviousViewInSameRow (int position)

Returns true if the view at the given position has a same row sibling in front of it. This will return true if first item view is not created. So application should check in both OnChildSelectedListener and OnChildLaidOutListener.

Parameters

position	Position in adapter.

public boolean isChildLayoutAnimated ()

Returns true if an animation will run when a child changes size or when adding or removing a child.

Unstable API, might change later.

public boolean isFocusDrawingOrderEnabled ()

Returns true if default "focus draw at last" order rule is enabled.

public final boolean isFocusSearchDisabled ()

Returns true if focus search is disabled.

public boolean isItemAlignmentOffsetWithPadding ()

Returns true if include padding in calculating item align offset.

public boolean isScrollEnabled ()

Returns true if scrolling is enabled.

public boolean onRequestFocusInDescendants (int direction, Rect previouslyFocusedRect)

Look for a descendant to call requestFocus() on. Called by requestFocus(int, android.graphics.Rect) when it wants to request focus within its children. Override this to customize how your ViewGroup requests focus within its children.

Parameters

direction	One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
previouslyFocusedRect	The rectangle (in this View's coordinate system) to give a finer grained hint about where focus is coming from. May be null if there is no hint.

Returns

Whether focus was taken.

public void onRtlPropertiesChanged (int layoutDirection)

Notify layout manager that layout directionality has been updated

Parameters

layoutDirection	the direction of the layout

public void setAnimateChildLayout (boolean animateChildLayout)

Sets whether an animation should run when a child changes size or when adding or removing a child.

Unstable API, might change later.

public void setChildrenVisibility (int visibility)

Changes and overrides children's visibility.

public final void setFadingLeftEdge (boolean fading)

Sets the fade out left edge to transparent. Note turn on fading edge is very expensive that you should turn off when HorizontalGridView is scrolling.

public final void setFadingLeftEdgeLength (int fadeLength)

Sets the left edge fading length in pixels.

public final void setFadingLeftEdgeOffset (int fadeOffset)

Sets the distance in pixels between fading start position and left padding edge. The fading start position is positive when start position is inside left padding area. Default value is 0, means that the fading starts from left padding edge.

public final void setFadingRightEdge (boolean fading)

Sets the fade out right edge to transparent. Note turn on fading edge is very expensive that you should turn off when HorizontalGridView is scrolling.

public final void setFadingRightEdgeLength (int fadeLength)

Sets the right edge fading length in pixels.

public final void setFadingRightEdgeOffset (int fadeOffset)

Returns the distance in pixels between fading start position and right padding edge. The fading start position is positive when start position is inside right padding area. Default value is 0, means that the fading starts from right padding edge.

public void setFocusDrawingOrderEnabled (boolean enabled)

Enables or disables the default "focus draw at last" order rule.

public void setFocusScrollStrategy (int scrollStrategy)

Sets the strategy used to scroll in response to item focus changing:

public final void setFocusSearchDisabled (boolean disabled)

Disables or enables focus search.

public void setGravity (int gravity)

Sets the gravity used for child view positioning. Defaults to GRAVITY_TOP|GRAVITY_START.

Parameters

gravity	See `Gravity`

public void setHasOverlappingRendering (boolean hasOverlapping)

public void setHorizontalMargin (int margin)

Sets the margin in pixels between two child items horizontally.

public void setItemAlignmentOffset (int offset)

Sets the absolute offset in pixels for item alignment. Item alignment settings are ignored for the child if ItemAlignmentFacet is provided by RecyclerView.ViewHolder or FacetProviderAdapter.

Parameters

offset	The number of pixels to offset. Can be negative for alignment from the high edge, or positive for alignment from the low edge.

public void setItemAlignmentOffsetPercent (float offsetPercent)

Sets the offset percent for item alignment in addition to getItemAlignmentOffset(). Item alignment settings are ignored for the child if ItemAlignmentFacet is provided by RecyclerView.ViewHolder or FacetProviderAdapter.

Parameters

offsetPercent	Percentage to offset. E.g., 40 means 40% of the width from the low edge. Use `ITEM_ALIGN_OFFSET_PERCENT_DISABLED` to disable.

public void setItemAlignmentOffsetWithPadding (boolean withPadding)

Set to true if include padding in calculating item align offset. Item alignment settings are ignored for the child if ItemAlignmentFacet is provided by RecyclerView.ViewHolder or FacetProviderAdapter.

Parameters

withPadding	When it is true: we include left/top padding for positive item offset, include right/bottom padding for negative item offset.

public void setItemAlignmentViewId (int viewId)

Sets the id of the view to align with. Use NO_ID (default) for the item view itself. Item alignment settings are ignored for the child if ItemAlignmentFacet is provided by RecyclerView.ViewHolder or FacetProviderAdapter.

public void setItemMargin (int margin)

Sets the margin in pixels between two child items.

public void setLayoutEnabled (boolean layoutEnabled)

Enables or disables layout. All children will be removed when layout is disabled.

public void setNumRows (int numRows)

Sets the number of rows. Defaults to one.

public void setOnChildLaidOutListener (OnChildLaidOutListener listener)

Registers a callback to be invoked when an item in BaseGridView has been laid out.

Parameters

listener	The listener to be invoked.

public void setOnChildSelectedListener (OnChildSelectedListener listener)

Registers a callback to be invoked when an item in BaseGridView has been selected. Note that the listener may be invoked when there is a layout pending on the view, affording the listener an opportunity to adjust the upcoming layout based on the selection state.

Parameters

listener	The listener to be invoked.

public void setOnChildViewHolderSelectedListener (OnChildViewHolderSelectedListener listener)

Parameters

listener	The listener to be invoked.

public void setOnKeyInterceptListener (BaseGridView.OnKeyInterceptListener listener)

Sets the key intercept listener.

public void setOnMotionInterceptListener (BaseGridView.OnMotionInterceptListener listener)

Sets the generic motion intercept listener.

public void setOnTouchInterceptListener (BaseGridView.OnTouchInterceptListener listener)

Sets the touch intercept listener.

public void setOnUnhandledKeyListener (BaseGridView.OnUnhandledKeyListener listener)

Sets the unhandled key listener.

public void setPruneChild (boolean pruneChild)

Enables or disables pruning of children. Disable is useful during transition.

public void setRecyclerListener (RecyclerView.RecyclerListener listener)

This listener will be called when a LayoutManager or the RecyclerView decides that a child view is no longer needed. If an application associates expensive or heavyweight data with item views, this may be a good place to release or free those resources.

Parameters

listener	Listener to register, or null to clear

public void setRowHeight (int height)

Sets the row height.

Parameters

height	May be `WRAP_CONTENT`, or a size in pixels. If zero, row height will be fixed based on number of rows and view height.

public final void setSaveChildrenLimitNumber (int limitNumber)

Sets the limit number when getSaveChildrenPolicy() is SAVE_LIMITED_CHILD.

public final void setSaveChildrenPolicy (int savePolicy)

Sets the policy for saving children.

Parameters

savePolicy	One of `SAVE_NO_CHILD` `SAVE_ON_SCREEN_CHILD` `SAVE_LIMITED_CHILD` `SAVE_ALL_CHILD`.

public void setScrollEnabled (boolean scrollEnabled)

Enables or disables scrolling. Disable is useful during transition.

public void setSelectedPosition (int position, int scrollExtra)

Changes the selected item immediately without animation, scrollExtra is applied in primary scroll direction. The scrollExtra will be kept until another setSelectedPosition(int) or setSelectedPositionSmooth(int) call.

public void setSelectedPosition (int position)

Changes the selected item immediately without animation.

public void setSelectedPositionSmooth (int position)

Changes the selected item and run an animation to scroll to the target position.

public void setSelectedPositionSmoothWithSub (int position, int subposition)

Changes the selected item and/or subposition, runs an animation to scroll to the target position.

public void setSelectedPositionWithSub (int position, int subposition, int scrollExtra)

Changes the selected item and/or subposition immediately without animation, scrollExtra is applied in primary scroll direction. The scrollExtra will be kept until another setSelectedPosition(int) or setSelectedPositionSmooth(int) call.

public void setSelectedPositionWithSub (int position, int subposition)

Changes the selected item and/or subposition immediately without animation.

public void setVerticalMargin (int margin)

Sets the margin in pixels between two child items vertically.

public void setWindowAlignment (int windowAlignment)

Sets the method for focused item alignment in the view.

Parameters

windowAlignment	`WINDOW_ALIGN_BOTH_EDGE`, `WINDOW_ALIGN_LOW_EDGE`, `WINDOW_ALIGN_HIGH_EDGE` or `WINDOW_ALIGN_NO_EDGE`.

public void setWindowAlignmentOffset (int offset)

Sets the offset in pixels for window alignment.

Parameters

offset	The number of pixels to offset. If the offset is positive, it is distance from low edge (see `WINDOW_ALIGN_LOW_EDGE`); if the offset is negative, the absolute value is distance from high edge (see `WINDOW_ALIGN_HIGH_EDGE`). Default value is 0.

public void setWindowAlignmentOffsetPercent (float offsetPercent)

Sets the offset percent for window alignment in addition to getWindowAlignmentOffset().

Parameters

offsetPercent	Percentage to offset. E.g., 40 means 40% of the width from low edge. Use `WINDOW_ALIGN_OFFSET_PERCENT_DISABLED` to disable. Default value is 50.

Protected Methods

protected void initAttributes (Context context, AttributeSet attrs)

protected void initBaseGridViewAttributes (Context context, AttributeSet attrs)

protected void onFocusChanged (boolean gainFocus, int direction, Rect previouslyFocusedRect)

Called by the view system when the focus state of this view changes. When the focus change event is caused by directional navigation, direction and previouslyFocusedRect provide insight into where the focus is coming from. When overriding, be sure to call up through to the super class so that the standard focus handling will occur.

Parameters

gainFocus	True if the View has focus; false otherwise.
direction	The direction focus has moved when requestFocus() is called to give this view focus. Values are `FOCUS_UP`, `FOCUS_DOWN`, `FOCUS_LEFT`, `FOCUS_RIGHT`, `FOCUS_FORWARD`, or `FOCUS_BACKWARD`. It may not always apply, in which case use the default.
previouslyFocusedRect	The rectangle, in this view's coordinate system, of the previously focused view. If applicable, this will be passed in as finer grained information about where the focus is coming from (in addition to direction). Will be `null` otherwise.

Results

Interfaces

Classes

HorizontalGridView

Class Overview

Summary

Constants

public static final int FOCUS_SCROLL_ALIGNED

public static final int FOCUS_SCROLL_ITEM

public static final int FOCUS_SCROLL_PAGE

public static final float ITEM_ALIGN_OFFSET_PERCENT_DISABLED

public static final int SAVE_ALL_CHILD

public static final int SAVE_LIMITED_CHILD

public static final int SAVE_NO_CHILD

public static final int SAVE_ON_SCREEN_CHILD

public static final int WINDOW_ALIGN_BOTH_EDGE

public static final int WINDOW_ALIGN_HIGH_EDGE

public static final int WINDOW_ALIGN_LOW_EDGE

public static final int WINDOW_ALIGN_NO_EDGE

public static final float WINDOW_ALIGN_OFFSET_PERCENT_DISABLED

Public Constructors

public HorizontalGridView (Context context)

public HorizontalGridView (Context context, AttributeSet attrs)

public HorizontalGridView (Context context, AttributeSet attrs, int defStyle)

Public Methods

public boolean dispatchGenericFocusedEvent (MotionEvent event)

Parameters

Returns

public boolean dispatchKeyEvent (KeyEvent event)

Parameters

Returns

public boolean dispatchTouchEvent (MotionEvent event)

Parameters

Returns

public void draw (Canvas canvas)

Parameters

public View focusSearch (int direction)

Parameters

Returns

public int getChildDrawingOrder (int childCount, int i)

Parameters

Returns

public final boolean getFadingLeftEdge ()

public final int getFadingLeftEdgeLength ()

public final int getFadingLeftEdgeOffset ()

public final boolean getFadingRightEdge ()

public final int getFadingRightEdgeLength ()

public final int getFadingRightEdgeOffset ()

public int getFocusScrollStrategy ()

public int getHorizontalMargin ()

public int getItemAlignmentOffset ()

Returns

public float getItemAlignmentOffsetPercent ()

Returns

public int getItemAlignmentViewId ()

public BaseGridView.OnUnhandledKeyListener getOnUnhandledKeyListener ()

public final int getSaveChildrenLimitNumber ()

public final int getSaveChildrenPolicy ()

Returns

public int getSelectedPosition ()

public int getSelectedSubPosition ()

public int getVerticalMargin ()

public void getViewSelectedOffsets (View view, int[] offsets)

Parameters

public int getWindowAlignment ()

Returns

public int getWindowAlignmentOffset ()

Returns

public float getWindowAlignmentOffsetPercent ()

Returns

public boolean hasOverlappingRendering ()

Returns

public boolean hasPreviousViewInSameRow (int position)

Parameters

public boolean isChildLayoutAnimated ()

public boolean isFocusDrawingOrderEnabled ()

public final boolean isFocusSearchDisabled ()

public boolean isItemAlignmentOffsetWithPadding ()

public boolean isScrollEnabled ()

public boolean onRequestFocusInDescendants (int direction, Rect previouslyFocusedRect)