Since: API Level 1

public abstract class

AbsListView

extends AdapterView<T extends Adapter>
implements TextWatcher ViewTreeObserver.OnGlobalLayoutListener ViewTreeObserver.OnTouchModeChangeListener Filter.FilterListener

java.lang.Object
↳	android.view.View
	↳	android.view.ViewGroup
		↳	android.widget.AdapterView<T extends android.widget.Adapter>
			↳	android.widget.AbsListView

Known Direct Subclasses

GridView, ListView

Known Indirect Subclasses

ExpandableListView

Class Overview

Base class that can be used to implement virtualized lists of items. A list does not have a spatial definition here. For instance, subclases of this class can display the content of the list in a grid, in a carousel, as stack, etc.

Summary

Nested Classes
class	AbsListView.LayoutParams	AbsListView extends LayoutParams to provide a place to hold the view type.
interface	AbsListView.OnScrollListener	Interface definition for a callback to be invoked when the list or grid has been scrolled.
interface	AbsListView.RecyclerListener	A RecyclerListener is used to receive a notification whenever a View is placed inside the RecycleBin's scrap heap.

XML Attributes
Attribute Name	Related Method	Description
android:cacheColorHint		Indicates that this list will always be drawn on top of solid, single-color opaque background.
android:drawSelectorOnTop	setDrawSelectorOnTop(boolean)	When set to true, the selector will be drawn over the selected item.
android:fastScrollEnabled		Enables the fast scroll thumb that can be dragged to quickly scroll through the list.
android:listSelector	setSelector(int)	Drawable used to indicate the currently selected item in the list.
android:scrollingCache		When set to true, the list uses a drawing cache during scrolling.
android:smoothScrollbar	setSmoothScrollbarEnabled(boolean)	When set to true, the list will use a more refined calculation method based on the pixels height of the items visible on screen.
android:stackFromBottom		Used by ListView and GridView to stack their content from the bottom.
android:textFilterEnabled		When set to true, the list will filter results as the user types.
android:transcriptMode		Sets the transcript mode for the list.

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Inherited XML Attributes

From class android.view.ViewGroup

From class android.view.View

Constants
int	TRANSCRIPT_MODE_ALWAYS_SCROLL	The list will automatically scroll to the bottom, no matter what items are currently visible.
int	TRANSCRIPT_MODE_DISABLED	Disables the transcript mode.
int	TRANSCRIPT_MODE_NORMAL	The list will automatically scroll to the bottom when a data set change notification is received and only if the last item is already visible on screen.

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Inherited Constants

From class android.widget.AdapterView

From class android.view.ViewGroup

From class android.view.View

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

Public Methods
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	afterTextChanged(Editable s) For our text watcher that is associated with the text filter.
void	beforeTextChanged(CharSequence s, int start, int count, int after) For our text watcher that is associated with the text filter.
boolean	checkInputConnectionProxy(View view) For filtering we proxy an input connection to an internal text editor, and this allows the proxying to happen.
void	clearTextFilter() Clear the text filter.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
AbsListView.LayoutParams	generateLayoutParams(AttributeSet attrs) Returns a new set of layout parameters based on the supplied attributes set.
int	getCacheColorHint() When set to a non-zero value, the cache color hint indicates that this list is always drawn on top of a solid, single-color, opaque background
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.
int	getListPaddingBottom() List padding is the maximum of the normal view's padding and the padding of the selector.
int	getListPaddingLeft() List padding is the maximum of the normal view's padding and the padding of the selector.
int	getListPaddingRight() List padding is the maximum of the normal view's padding and the padding of the selector.
int	getListPaddingTop() List padding is the maximum of the normal view's padding and the padding of the selector.
View	getSelectedView()
Drawable	getSelector() Returns the selector `Drawable` that is used to draw the selection in the list.
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.
CharSequence	getTextFilter() Returns the list's text filter, if available.
int	getTranscriptMode() Returns the current transcript mode.
boolean	hasTextFilter() Returns if the ListView currently has a text filter.
void	invalidateViews() Causes all the views to be rebuilt and redrawn.
boolean	isFastScrollEnabled() Returns the current state of the fast scroll feature.
boolean	isScrollingCacheEnabled() Indicates whether the children's drawing cache is used during a scroll.
boolean	isSmoothScrollbarEnabled() Returns the current state of the fast scroll feature.
boolean	isStackFromBottom() Indicates whether the content of this view is pinned to, or stacked from, the bottom edge.
boolean	isTextFilterEnabled() Indicates whether type filtering is enabled for this view
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Return an InputConnection for editing of the filter text.
void	onFilterComplete(int count) Notifies the end of a filtering operation.
void	onGlobalLayout() Callback method to be invoked when the global layout state or the visibility of views within the view tree changes
boolean	onInterceptTouchEvent(MotionEvent ev) Implement this method to intercept all touch screen motion events.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
void	onRestoreInstanceState(Parcelable state) Hook allowing a view to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
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	onTextChanged(CharSequence s, int start, int before, int count) For our text watcher that is associated with the text filter.
boolean	onTouchEvent(MotionEvent ev) Implement this method to handle touch screen motion events.
void	onTouchModeChanged(boolean isInTouchMode) Callback method to be invoked when the touch mode changes.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
int	pointToPosition(int x, int y) Maps a point to a position in the list.
long	pointToRowId(int x, int y) Maps a point to a the rowId of the item which intersects that point.
void	reclaimViews(List<View> views) Move all views (excluding headers and footers) held by this AbsListView into the supplied List.
void	requestLayout() Call this when something has changed which has invalidated the layout of this view.
void	setCacheColorHint(int color) When set to a non-zero value, the cache color hint indicates that this list is always drawn on top of a solid, single-color, opaque background
void	setDrawSelectorOnTop(boolean onTop) Controls whether the selection highlight drawable should be drawn on top of the item or behind it.
void	setFastScrollEnabled(boolean enabled) Enables fast scrolling by letting the user quickly scroll through lists by dragging the fast scroll thumb.
void	setFilterText(String filterText) Sets the initial value for the text filter.
void	setOnScrollListener(AbsListView.OnScrollListener l) Set the listener that will receive notifications every time the list scrolls.
void	setRecyclerListener(AbsListView.RecyclerListener listener) Sets the recycler listener to be notified whenever a View is set aside in the recycler for later reuse.
void	setScrollIndicators(View up, View down)
void	setScrollingCacheEnabled(boolean enabled) Enables or disables the children's drawing cache during a scroll.
void	setSelector(int resID) Set a Drawable that should be used to highlight the currently selected item.
void	setSelector(Drawable sel)
void	setSmoothScrollbarEnabled(boolean enabled) When smooth scrollbar is enabled, the position and size of the scrollbar thumb is computed based on the number of visible pixels in the visible items.
void	setStackFromBottom(boolean stackFromBottom) When stack from bottom is set to true, the list fills its content starting from the bottom of the view.
void	setTextFilterEnabled(boolean textFilterEnabled) Enables or disables the type filter window.
void	setTranscriptMode(int mode) Puts the list or grid into transcript mode.
boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
boolean	verifyDrawable(Drawable dr) If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.

Protected Methods
boolean	checkLayoutParams(ViewGroup.LayoutParams p)
int	computeVerticalScrollExtent() Compute the vertical extent of the horizontal 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.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
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.
ViewGroup.LayoutParams	generateLayoutParams(ViewGroup.LayoutParams p) Returns a safe set of layout parameters based on the supplied layout params.
float	getBottomFadingEdgeStrength() Returns the strength, or intensity, of the bottom faded edge.
ContextMenu.ContextMenuInfo	getContextMenuInfo() Views should implement this if they have extra information to associate with the context menu.
float	getTopFadingEdgeStrength() Returns the strength, or intensity, of the top faded edge.
void	handleDataChanged()
boolean	isInFilterMode() Indicates whether this view is in filter mode.
void	layoutChildren() Subclasses must override this method to layout their children.
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.
void	onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
void	onLayout(boolean changed, int l, int t, int r, int b) Subclasses should NOT override this method but `layoutChildren()` instead.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.

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Inherited Methods

From class android.widget.AdapterView

From class android.view.ViewGroup

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.
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) 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.
void	addView(View child, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, int index, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child) Adds a child view.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params) Adds a view during layout.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params, boolean preventRequestLayout) 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 {link #addStatesFromChildren} is true, refreshes this group's drawable state (to include the states from its children).
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 view from their parent.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchFreezeSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `freeze()` to only this view, not to its children.
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	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` children to be populated.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(SparseArray)` to store the state for this view and its 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	dispatchThawSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `thaw()` 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	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
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.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
boolean	fitSystemWindows(Rect insets) Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag is set
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(ViewGroup.LayoutParams p) Returns a safe set of layout parameters based on the supplied layout params.
ViewGroup.LayoutParams	generateLayoutParams(AttributeSet attrs) Returns a new set of layout parameters based on the supplied attributes set.
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)
boolean	getChildVisibleRect(View child, Rect r, Point offset)
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	getPersistentDrawingCache() Returns an integer indicating what types of drawing caches are kept in memory.
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.
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() Indicates whether this ViewGroup will always try to draw its children using their drawing cache.
boolean	isAnimationCacheEnabled() Indicates whether the children's drawing cache is used during a layout animation.
boolean	isChildrenDrawingOrderEnabled() Indicates whether the ViewGroup is drawing its children in the order defined by `getChildDrawingOrder(int, int)`.
boolean	isChildrenDrawnWithCacheEnabled() Indicates whether the ViewGroup is currently drawing its children using their drawing cache.
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.
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	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.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
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	onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) Look for a descendant to call `requestFocus()` on.
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)
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()`.
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) Indicates whether this ViewGroup will always try to draw its children using their drawing cache.
void	setAnimationCacheEnabled(boolean enabled) Enables or disables the children's drawing cache during a layout animation.
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) Tells the ViewGroup to draw its children using their drawing cache.
void	setClipChildren(boolean clipChildren) By default, children are clipped to their bounds before drawing.
void	setClipToPadding(boolean clipToPadding) By default, children are clipped to the padding of the ViewGroup.
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	setOnHierarchyChangeListener(ViewGroup.OnHierarchyChangeListener listener) Register a callback to be invoked when a child is added to or removed from this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
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.
boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
void	startLayoutAnimation() Runs the layout animation.
void	updateViewLayout(View view, ViewGroup.LayoutParams params)

From class android.view.View

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	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.
boolean	awakenScrollBars() Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay, boolean invalidate) Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay) 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(boolean autoScale) Forces the drawing cache to be built if the drawing cache is invalid.
void	buildDrawingCache() Calling this method is equivalent to calling `buildDrawingCache(false)`.
void	cancelLongPress() Cancels a pending long press.
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.
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.
int	computeVerticalScrollExtent() Compute the vertical extent of the horizontal 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.
void	createContextMenu(ContextMenu menu) Show the context menu for this view.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
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	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` children to be populated.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(SparseArray)` to store the state for this view and its 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.
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	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
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	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	finalize() Is called before the object's memory is being reclaimed by the VM.
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.
boolean	fitSystemWindows(Rect insets) Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag is set
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.
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
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.
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.
final int[]	getDrawableState() Return an array of resource IDs of the drawable states representing the current state of the view.
Bitmap	getDrawingCache() Calling this method is equivalent to calling `getDrawingCache(false)`.
Bitmap	getDrawingCache(boolean autoScale) Returns the bitmap in which this view drawing is cached.
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.
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.
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.
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.
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.
final int	getMeasuredHeight() The height of this view as measured in the most recent call to measure().
final int	getMeasuredWidth() The width of this view as measured in the most recent call to measure().
int	getNextFocusDownId()
int	getNextFocusLeftId()
int	getNextFocusRightId()
int	getNextFocusUpId()
View.OnFocusChangeListener	getOnFocusChangeListener() Returns the focus-change callback registered for this view.
int	getPaddingBottom() Returns the bottom padding of this view.
int	getPaddingLeft() Returns the left padding of this view.
int	getPaddingRight() Returns the right padding of this view.
int	getPaddingTop() Returns the top padding of this view.
final ViewParent	getParent() Gets the parent of this view.
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.
int	getScrollBarStyle() Returns the current scrollbar style.
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.
int	getSuggestedMinimumHeight() Returns the suggested minimum height that the view should use.
int	getSuggestedMinimumWidth() Returns the suggested minimum width that the view should use.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
Object	getTag() Returns this view's tag.
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.
int	getVerticalFadingEdgeLength() Returns the size of the vertical faded edges used to indicate that more content in this view is visible.
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()
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.
boolean	hasFocus() Returns true if this view has focus iteself, 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	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	initializeFadingEdge(TypedArray a) Initializes the fading edges from a given set of styled attributes.
void	initializeScrollbars(TypedArray a) Initializes the scrollbars from a given set of styled attributes.
void	invalidate(int l, int t, int r, int b) Mark the the area defined by the rect (l,t,r,b) as needing to be drawn.
void	invalidate() Invalidate the whole view.
void	invalidate(Rect dirty) Mark the the area defined by dirty as needing to be drawn.
void	invalidateDrawable(Drawable drawable) Invalidates the specified Drawable.
boolean	isClickable() Indicates whether this view reacts to click events or not.
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	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	isInEditMode() Indicates whether this View is currently in edit mode.
boolean	isInTouchMode() Returns whether the device is currently in touch mode.
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	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	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	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	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.
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.
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.
void	onAttachedToWindow() This is called when the view is attached to a window.
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	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	onDraw(Canvas canvas) Implement this to do your drawing.
final void	onDrawScrollBars(Canvas canvas) Request the drawing of the horizontal and the vertical scrollbar.
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	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: 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 when an unhandled key shortcut event occurs.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: 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	onRestoreInstanceState(Parcelable state) Hook allowing a view to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
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	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 that currently has focus, 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	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between `GONE`, `INVISIBLE`, and `VISIBLE`).
boolean	performClick() Call this view's OnClickListener, 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() Cause an invalidate to happen on a subsequent cycle through the event loop.
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	postInvalidateDelayed(long delayMilliseconds) 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	refreshDrawableState() Call this to force a view to update its drawable state.
boolean	removeCallbacks(Runnable action) Removes the specified Runnable from the message queue.
final boolean	requestFocus() Call this to try to give focus to a specific view or to one of its descendants.
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	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, boolean immediate) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
boolean	requestRectangleOnScreen(Rect rectangle) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
static int	resolveSize(int size, int measureSpec) Utility to reconcile a desired size 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) Handles the request for sending an `AccessibilityEvent` given the event type.
void	sendAccessibilityEventUnchecked(AccessibilityEvent event) Handles the request for sending an `AccessibilityEvent`.
void	setAnimation(Animation animation) Sets the next animation to play for this view.
void	setBackgroundColor(int color) Sets the background color for this view.
void	setBackgroundDrawable(Drawable d) Set the background to a given Drawable, or remove the background.
void	setBackgroundResource(int resid) Set the background to a given resource.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setContentDescription(CharSequence contentDescription) Sets the `View` description.
void	setDrawingCacheBackgroundColor(int color) Setting a solid background color for the drawing cache's bitmaps will improve perfromance 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	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	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	setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) Set whether this view should have haptic feedback for events such as long presses.
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	setId(int id) Sets the identifier for this view.
void	setKeepScreenOn(boolean keepScreenOn) Controls whether the screen should remain on, modifying the value of `KEEP_SCREEN_ON`.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
void	setLongClickable(boolean longClickable) Enables or disables long click events for this view.
final void	setMeasuredDimension(int measuredWidth, int measuredHeight) This mehod 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	setNextFocusDownId(int nextFocusDownId) Set the id of the view to use for the next focus
void	setNextFocusLeftId(int nextFocusLeftId) Set the id of the view to use for the next focus
void	setNextFocusRightId(int nextFocusRightId) Set the id of the view to use for the next focus
void	setNextFocusUpId(int nextFocusUpId) Set the id of the view to use for the next focus
void	setOnClickListener(View.OnClickListener l) Register a callback to be invoked when this view is clicked.
void	setOnCreateContextMenuListener(View.OnCreateContextMenuListener l) Register a callback to be invoked when the context menu for this view is being built.
void	setOnFocusChangeListener(View.OnFocusChangeListener l) Register a callback to be invoked when focus of this view changed.
void	setOnKeyListener(View.OnKeyListener l) Register a callback to be invoked when a 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	setOnTouchListener(View.OnTouchListener l) Register a callback to be invoked when a touch event is sent to this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPressed(boolean pressed) Sets the pressed that for this view.
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	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	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	setTag(Object tag) Sets the tag associated with this view.
void	setTag(int key, Object tag) Sets a tag associated with this view and a key.
void	setTouchDelegate(TouchDelegate delegate) Sets the TouchDelegate for this View.
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	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.
boolean	showContextMenu() Bring up the context menu for this view.
void	startAnimation(Animation animation) Start the specified animation now.
void	unscheduleDrawable(Drawable who, Runnable what) Cancels a scheduled action on a drawable.
void	unscheduleDrawable(Drawable who) Unschedule any events associated with the given 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() Is called before the object's memory is being reclaimed by the VM.
final Class<? extends Object>	getClass() Returns the unique instance of `Class` which 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(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.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.

From interface android.graphics.drawable.Drawable.Callback

From interface android.text.TextWatcher

From interface android.view.KeyEvent.Callback

From interface android.view.ViewManager

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 void	childDrawableStateChanged(View child) This method is called on the parent when a child's drawable state has changed.
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)
abstract ViewParent	getParent() Returns the parent if it exists, or null.
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	isLayoutRequested() Indicates whether layout was requested on this view parent.
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	requestLayout() Called when something has changed which has invalidated the layout of a child of this view parent.
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.

From interface android.view.ViewTreeObserver.OnGlobalLayoutListener

From interface android.view.ViewTreeObserver.OnTouchModeChangeListener

From interface android.view.accessibility.AccessibilityEventSource

From interface android.widget.Filter.FilterListener

XML Attributes

android:cacheColorHint

Since: API Level

Indicates that this list will always be drawn on top of solid, single-color opaque background. This allows the list to optimize drawing.

Must be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol cacheColorHint.

Related Methods

android:drawSelectorOnTop

Since: API Level

When set to true, the selector will be drawn over the selected item. Otherwise the selector is drawn behind the selected item. The default value is false.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol drawSelectorOnTop.

Related Methods

setDrawSelectorOnTop(boolean)

android:fastScrollEnabled

Since: API Level

Enables the fast scroll thumb that can be dragged to quickly scroll through the list.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol fastScrollEnabled.

Related Methods

android:listSelector

Since: API Level

Drawable used to indicate the currently selected item in the list.

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

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

This corresponds to the global attribute resource symbol listSelector.

Related Methods

setSelector(int)

android:scrollingCache

Since: API Level

When set to true, the list uses a drawing cache during scrolling. This makes the rendering faster but uses more memory. The default value is true.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol scrollingCache.

Related Methods

android:smoothScrollbar

Since: API Level

When set to true, the list will use a more refined calculation method based on the pixels height of the items visible on screen. This property is set to true by default but should be set to false if your adapter will display items of varying heights. When this property is set to true and your adapter displays items of varying heights, the scrollbar thumb will change size as the user scrolls through the list. When set to fale, the list will use only the number of items in the adapter and the number of items visible on screen to determine the scrollbar's properties.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol smoothScrollbar.

Related Methods

setSmoothScrollbarEnabled(boolean)

android:stackFromBottom

Since: API Level

Used by ListView and GridView to stack their content from the bottom.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol stackFromBottom.

Related Methods

android:textFilterEnabled

Since: API Level

When set to true, the list will filter results as the user types. The List's adapter must support the Filterable interface for this to work.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol textFilterEnabled.

Related Methods

android:transcriptMode

Since: API Level

Sets the transcript mode for the list. In transcript mode, the list scrolls to the bottom to make new items visible when they are added.

Must be one of the following constant values.

Constant	Value	Description
`disabled`	0	Disables transcript mode. This is the default value.
`normal`	1	The list will automatically scroll to the bottom when a data set change notification is received and only if the last item is already visible on screen.
`alwaysScroll`	2	The list will automatically scroll to the bottom, no matter what items are currently visible.

This corresponds to the global attribute resource symbol transcriptMode.

Related Methods

Constants

public static final int TRANSCRIPT_MODE_ALWAYS_SCROLL

Since: API Level 1

The list will automatically scroll to the bottom, no matter what items are currently visible.

public static final int TRANSCRIPT_MODE_DISABLED

Since: API Level 1

Disables the transcript mode.

public static final int TRANSCRIPT_MODE_NORMAL

Since: API Level 1

The list will automatically scroll to the bottom when a data set change notification is received and only if the last item is already visible on screen.

Public Constructors

public AbsListView (Context context)

Since: API Level 1

public AbsListView (Context context, AttributeSet attrs)

Since: API Level 1

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

Since: API Level 1

Public Methods

public void addTouchables (ArrayList<View> views)

Since: API Level 1

Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.

Parameters

views	Touchable views found so far

public void afterTextChanged (Editable s)

Since: API Level 1

For our text watcher that is associated with the text filter. Does nothing.

public void beforeTextChanged (CharSequence s, int start, int count, int after)

Since: API Level 1

For our text watcher that is associated with the text filter. Does nothing.

public boolean checkInputConnectionProxy (View view)

Since: API Level 3

For filtering we proxy an input connection to an internal text editor, and this allows the proxying to happen.

Parameters

view	The View that is making the InputMethodManager call.

Returns

Return true to allow the call, false to reject.

public void clearTextFilter ()

Since: API Level 1

Clear the text filter.

public void draw (Canvas canvas)

Since: API Level 1

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, do not override this method; instead, you should implement onDraw(Canvas).

Parameters

canvas	The Canvas to which the View is rendered.

public AbsListView.LayoutParams generateLayoutParams (AttributeSet attrs)

Since: API Level 1

Returns a new set of layout parameters based on the supplied attributes set.

Parameters

attrs	the attributes to build the layout parameters from

Returns

an instance of ViewGroup.LayoutParams or one of its descendants

public int getCacheColorHint ()

Since: API Level 1

When set to a non-zero value, the cache color hint indicates that this list is always drawn on top of a solid, single-color, opaque background

Returns

The cache color hint

public void getFocusedRect (Rect r)

Since: API Level 1

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. By default, the rectange is the getDrawingRect(Rect))of the view. However, if your view maintains some idea of internal selection, such as a cursor, or a selected row or column, you should override this method and fill in a more specific rectangle.

Parameters

r	The rectangle to fill in, in this view's coordinates.

public int getListPaddingBottom ()

Since: API Level 1

List padding is the maximum of the normal view's padding and the padding of the selector.

Returns

The bottom list padding.

public int getListPaddingLeft ()

Since: API Level 1

List padding is the maximum of the normal view's padding and the padding of the selector.

Returns

The left list padding.

public int getListPaddingRight ()

Since: API Level 1

List padding is the maximum of the normal view's padding and the padding of the selector.

Returns

The right list padding.

public int getListPaddingTop ()

Since: API Level 1

List padding is the maximum of the normal view's padding and the padding of the selector.

Returns

The top list padding.

public View getSelectedView ()

Since: API Level 1

Returns

The view corresponding to the currently selected item, or null if nothing is selected

public Drawable getSelector ()

Since: API Level 1

Returns the selector Drawable that is used to draw the selection in the list.

Returns

the drawable used to display the selector

public int getSolidColor ()

Since: API Level 1

Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges. Returning a non-zero color enables the view system to optimize the drawing of the fading edges. If you do return a non-zero color, the alpha should be set to 0xFF.

Returns

The known solid color background for this view, or 0 if the color may vary

public CharSequence getTextFilter ()

Since: API Level 3

Returns the list's text filter, if available.

Returns

the list's text filter or null if filtering isn't enabled

public int getTranscriptMode ()

Since: API Level 1

Returns the current transcript mode.

Returns

TRANSCRIPT_MODE_DISABLED, TRANSCRIPT_MODE_NORMAL or TRANSCRIPT_MODE_ALWAYS_SCROLL

public boolean hasTextFilter ()

Since: API Level 1

Returns if the ListView currently has a text filter.

public void invalidateViews ()

Since: API Level 1

Causes all the views to be rebuilt and redrawn.

public boolean isFastScrollEnabled ()

Since: API Level 3

Returns the current state of the fast scroll feature.

Returns

true if fast scroll is enabled, false otherwise

public boolean isScrollingCacheEnabled ()

Since: API Level 1

Indicates whether the children's drawing cache is used during a scroll. By default, the drawing cache is enabled but this will consume more memory.

Returns

true if the scrolling cache is enabled, false otherwise

public boolean isSmoothScrollbarEnabled ()

Since: API Level 3

Returns the current state of the fast scroll feature.

Returns

True if smooth scrollbar is enabled is enabled, false otherwise.

public boolean isStackFromBottom ()

Since: API Level 1

Indicates whether the content of this view is pinned to, or stacked from, the bottom edge.

Returns

true if the content is stacked from the bottom edge, false otherwise

public boolean isTextFilterEnabled ()

Since: API Level 1

Indicates whether type filtering is enabled for this view

Returns

true if type filtering is enabled, false otherwise

public InputConnection onCreateInputConnection (EditorInfo outAttrs)

Since: API Level 3

Return an InputConnection for editing of the filter text.

Parameters

outAttrs	Fill in with attribute information about the connection.

public void onFilterComplete (int count)

Since: API Level 1

Notifies the end of a filtering operation.

Parameters

count	the number of values computed by the filter

public void onGlobalLayout ()

Since: API Level 1

Callback method to be invoked when the global layout state or the visibility of views within the view tree changes

public boolean onInterceptTouchEvent (MotionEvent ev)

Since: API Level 1

Implement this method to intercept all touch screen motion events. This allows you to watch events as they are dispatched to your children, and take ownership of the current gesture at any point.

Using this function takes some care, as it has a fairly complicated interaction with View.onTouchEvent(MotionEvent), and using it requires implementing that method as well as this one in the correct way. Events will be received in the following order:

You will receive the down event here.
The down event will be handled either by a child of this view group, or given to your own onTouchEvent() method to handle; this means you should implement onTouchEvent() to return true, so you will continue to see the rest of the gesture (instead of looking for a parent view to handle it). Also, by returning true from onTouchEvent(), you will not receive any following events in onInterceptTouchEvent() and all touch processing must happen in onTouchEvent() like normal.
For as long as you return false from this function, each following event (up to and including the final up) will be delivered first here and then to the target's onTouchEvent().
If you return true from here, you will not receive any following events: the target view will receive the same event but with the action ACTION_CANCEL, and all further events will be delivered to your onTouchEvent() method and no longer appear here.

Parameters

ev	The motion event being dispatched down the hierarchy.

Returns

Return true to steal motion events from the children and have them dispatched to this ViewGroup through onTouchEvent(). The current target will receive an ACTION_CANCEL event, and no further messages will be delivered here.

public boolean onKeyDown (int keyCode, KeyEvent event)

Since: API Level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): perform press of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released, if the view is enabled and clickable.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onKeyUp (int keyCode, KeyEvent event)

Since: API Level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): perform clicking of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public void onRestoreInstanceState (Parcelable state)

Since: API Level 1

Hook allowing a view to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState(). This function will never be called with a null state.

Parameters

state	The frozen state that had previously been returned by `onSaveInstanceState()`.

public Parcelable onSaveInstanceState ()

Since: API Level 1

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. This state should only contain information that is not persistent or can not be reconstructed later. For example, you will never store your current position on screen because that will be computed again when a new instance of the view is placed in its view hierarchy.

Some examples of things you may store here: the current cursor position in a text view (but usually not the text itself since that is stored in a content provider or other persistent storage), the currently selected item in a list view.

Returns

Returns a Parcelable object containing the view's current dynamic state, or null if there is nothing interesting to save. The default implementation returns null.

public void onTextChanged (CharSequence s, int start, int before, int count)

Since: API Level 1

For our text watcher that is associated with the text filter. Performs the actual filtering as the text changes, and takes care of hiding and showing the popup displaying the currently entered filter text.

public boolean onTouchEvent (MotionEvent ev)

Since: API Level 1

Implement this method to handle touch screen motion events.

Parameters

ev	The motion event.

Returns

True if the event was handled, false otherwise.

public void onTouchModeChanged (boolean isInTouchMode)

Since: API Level 1

Callback method to be invoked when the touch mode changes.

Parameters

isInTouchMode	True if the view hierarchy is now in touch mode, false otherwise.

public void onWindowFocusChanged (boolean hasWindowFocus)

Since: API Level 1

Called when the window containing this view gains or loses focus. Note that this is separate from view focus: to receive key events, both your view and its window must have focus. If a window is displayed on top of yours that takes input focus, then your own window will lose focus but the view focus will remain unchanged.

Parameters

hasWindowFocus	True if the window containing this view now has focus, false otherwise.

public int pointToPosition (int x, int y)

Since: API Level 1

Maps a point to a position in the list.

Parameters

x	X in local coordinate
y	Y in local coordinate

Returns

The position of the item which contains the specified point, or INVALID_POSITION if the point does not intersect an item.

public long pointToRowId (int x, int y)

Since: API Level 1

Maps a point to a the rowId of the item which intersects that point.

Parameters

x	X in local coordinate
y	Y in local coordinate

Returns

The rowId of the item which contains the specified point, or INVALID_ROW_ID if the point does not intersect an item.

public void reclaimViews (List<View> views)

Since: API Level 1

Move all views (excluding headers and footers) held by this AbsListView into the supplied List. This includes views displayed on the screen as well as views stored in AbsListView's internal view recycler.

Parameters

views	A list into which to put the reclaimed views

public void requestLayout ()

Since: API Level 1

Call this when something has changed which has invalidated the layout of this view. This will schedule a layout pass of the view tree.

public void setCacheColorHint (int color)

Since: API Level 1

When set to a non-zero value, the cache color hint indicates that this list is always drawn on top of a solid, single-color, opaque background

Parameters

color	The background color

public void setDrawSelectorOnTop (boolean onTop)

Since: API Level 1

Controls whether the selection highlight drawable should be drawn on top of the item or behind it.

Related XML Attributes

android:drawSelectorOnTop

Parameters

onTop	If true, the selector will be drawn on the item it is highlighting. The default is false.

public void setFastScrollEnabled (boolean enabled)

Since: API Level 3

Enables fast scrolling by letting the user quickly scroll through lists by dragging the fast scroll thumb. The adapter attached to the list may want to implement SectionIndexer if it wishes to display alphabet preview and jump between sections of the list.

Parameters

enabled	whether or not to enable fast scrolling

public void setFilterText (String filterText)

Since: API Level 1

Sets the initial value for the text filter.

Parameters

filterText	The text to use for the filter.

public void setOnScrollListener (AbsListView.OnScrollListener l)

Since: API Level 1

Set the listener that will receive notifications every time the list scrolls.

Parameters

l	the scroll listener

public void setRecyclerListener (AbsListView.RecyclerListener listener)

Since: API Level 1

Sets the recycler listener to be notified whenever a View is set aside in the recycler for later reuse. This listener can be used to free resources associated to the View.

Parameters

listener	The recycler listener to be notified of views set aside in the recycler.

public void setScrollIndicators (View up, View down)

Since: API Level 1

public void setScrollingCacheEnabled (boolean enabled)

Since: API Level 1

Enables or disables the children's drawing cache during a scroll. By default, the drawing cache is enabled but this will use more memory. When the scrolling cache is enabled, the caches are kept after the first scrolling. You can manually clear the cache by calling setChildrenDrawingCacheEnabled(boolean).

Parameters

enabled	true to enable the scroll cache, false otherwise

public void setSelector (int resID)

Since: API Level 1

Set a Drawable that should be used to highlight the currently selected item.

Related XML Attributes

android:listSelector

Parameters

resID	A Drawable resource to use as the selection highlight.

public void setSelector (Drawable sel)

Since: API Level 1

public void setSmoothScrollbarEnabled (boolean enabled)

Since: API Level 3

When smooth scrollbar is enabled, the position and size of the scrollbar thumb is computed based on the number of visible pixels in the visible items. This however assumes that all list items have the same height. If you use a list in which items have different heights, the scrollbar will change appearance as the user scrolls through the list. To avoid this issue, you need to disable this property. When smooth scrollbar is disabled, the position and size of the scrollbar thumb is based solely on the number of items in the adapter and the position of the visible items inside the adapter. This provides a stable scrollbar as the user navigates through a list of items with varying heights.

Related XML Attributes

android:smoothScrollbar

Parameters

enabled	Whether or not to enable smooth scrollbar.

public void setStackFromBottom (boolean stackFromBottom)

Since: API Level 1

When stack from bottom is set to true, the list fills its content starting from the bottom of the view.

Parameters

stackFromBottom	true to pin the view's content to the bottom edge, false to pin the view's content to the top edge

public void setTextFilterEnabled (boolean textFilterEnabled)

Since: API Level 1

Enables or disables the type filter window. If enabled, typing when this view has focus will filter the children to match the users input. Note that the Adapter used by this view must implement the Filterable interface.

Parameters

textFilterEnabled	true to enable type filtering, false otherwise

public void setTranscriptMode (int mode)

Since: API Level 1

Puts the list or grid into transcript mode. In this mode the list or grid will always scroll to the bottom to show new items.

Parameters

mode	the transcript mode to set

public boolean showContextMenuForChild (View originalView)

Since: API Level 1

Bring up a context menu for the specified view or its ancestors.

In most cases, a subclass does not need to override this. However, if the subclass is added directly to the window manager (for example, addView(View, android.view.ViewGroup.LayoutParams)) then it should override this and show the context menu.

Parameters

originalView	The source view where the context menu was first invoked

Returns

true if a context menu was displayed

public boolean verifyDrawable (Drawable dr)

Since: API Level 1

If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying. This allows animations for those drawables to be scheduled.

Be sure to call through to the super class when overriding this function.

Parameters

dr	The Drawable to verify. Return true if it is one you are displaying, else return the result of calling through to the super class.

Returns

boolean If true than the Drawable is being displayed in the view; else false and it is not allowed to animate.

Protected Methods

protected boolean checkLayoutParams (ViewGroup.LayoutParams p)

Since: API Level 1

protected int computeVerticalScrollExtent ()

Since: API Level 1

Compute the vertical extent of the horizontal scrollbar's thumb within the vertical range. This value is used to compute the length of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeVerticalScrollOffset().

The default extent is the drawing height of this view.

Returns

the vertical extent of the scrollbar's thumb

protected int computeVerticalScrollOffset ()

Since: API Level 1

Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollExtent().

The default offset is the scroll offset of this view.

Returns

the vertical offset of the scrollbar's thumb

protected int computeVerticalScrollRange ()

Since: API Level 1

Compute the vertical range that the vertical scrollbar represents.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollExtent() and computeVerticalScrollOffset().

Returns

the total vertical range represented by the vertical scrollbar
The default range is the drawing height of this view.

protected void dispatchDraw (Canvas canvas)

Since: API Level 1

Called by draw to draw the child views. This may be overridden by derived classes to gain control just before its children are drawn (but after its own view has been drawn).

Parameters

canvas	the canvas on which to draw the view

protected void dispatchSetPressed (boolean pressed)

Since: API Level 1

Dispatch setPressed to all of this View's children.

Parameters

pressed	The new pressed state

protected void drawableStateChanged ()

Since: API Level 1

This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.

Be sure to call through to the superclass when overriding this function.

protected ViewGroup.LayoutParams generateLayoutParams (ViewGroup.LayoutParams p)

Since: API Level 1

Returns a safe set of layout parameters based on the supplied layout params. When a ViewGroup is passed a View whose layout params do not pass the test of checkLayoutParams(android.view.ViewGroup.LayoutParams), this method is invoked. This method should return a new set of layout params suitable for this ViewGroup, possibly by copying the appropriate attributes from the specified set of layout params.

Parameters

p	The layout parameters to convert into a suitable set of layout parameters for this ViewGroup.

Returns

an instance of ViewGroup.LayoutParams or one of its descendants

protected float getBottomFadingEdgeStrength ()

Since: API Level 1

Returns the strength, or intensity, of the bottom faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

Returns

the intensity of the bottom fade as a float between 0.0f and 1.0f

protected ContextMenu.ContextMenuInfo getContextMenuInfo ()

Since: API Level 1

Views should implement this if they have extra information to associate with the context menu. The return result is supplied as a parameter to the onCreateContextMenu(ContextMenu, View, ContextMenuInfo) callback.

Returns

Extra information about the item for which the context menu should be shown. This information will vary across different subclasses of View.

protected float getTopFadingEdgeStrength ()

Since: API Level 1

Returns the strength, or intensity, of the top faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

Returns

the intensity of the top fade as a float between 0.0f and 1.0f

protected void handleDataChanged ()

Since: API Level 1

protected boolean isInFilterMode ()

Since: API Level 1

Indicates whether this view is in filter mode. Filter mode can for instance be enabled by a user when typing on the keyboard.

Returns

True if the view is in filter mode, false otherwise.

protected void layoutChildren ()

Since: API Level 1

Subclasses must override this method to layout their children.

protected void onAttachedToWindow ()

Since: API Level 1

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

protected int[] onCreateDrawableState (int extraSpace)

Since: API Level 1

Generate the new Drawable state for this view. This is called by the view system when the cached Drawable state is determined to be invalid. To retrieve the current state, you should use getDrawableState().

Parameters

extraSpace	if non-zero, this is the number of extra entries you would like in the returned array in which you can place your own states.

Returns

Returns an array holding the current Drawable state of the view.

protected void onDetachedFromWindow ()

Since: API Level 1

This is called when the view is detached from a window. At this point it no longer has a surface for drawing.

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

Since: API Level 1

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 View.FOCUS_UP, View.FOCUS_DOWN, View.FOCUS_LEFT or View.FOCUS_RIGHT. 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.

protected void onLayout (boolean changed, int l, int t, int r, int b)

Since: API Level 1

Subclasses should NOT override this method but layoutChildren() instead.

Parameters

changed	This is a new size or position for this view
l	Left position, relative to parent
t	Top position, relative to parent
r	Right position, relative to parent
b	Bottom position, relative to parent

protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec)

Since: API Level 1

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overriden by subclasses to provide accurate and efficient measurement of their contents.

CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

Parameters

widthMeasureSpec	horizontal space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.
heightMeasureSpec	vertical space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.

protected void onSizeChanged (int w, int h, int oldw, int oldh)

Since: API Level 1

This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.

Parameters

w	Current width of this view.
h	Current height of this view.
oldw	Old width of this view.
oldh	Old height of this view.

Interfaces

Classes

Enums

Exceptions

AbsListView

Class Overview

Summary

XML Attributes

android:cacheColorHint

Related Methods

android:drawSelectorOnTop

Related Methods

android:fastScrollEnabled

Related Methods

android:listSelector

Related Methods

android:scrollingCache

Related Methods

android:smoothScrollbar

Related Methods

android:stackFromBottom

Related Methods

android:textFilterEnabled

Related Methods

android:transcriptMode

Related Methods

Constants

public static final int TRANSCRIPT_MODE_ALWAYS_SCROLL

See Also

public static final int TRANSCRIPT_MODE_DISABLED

See Also

public static final int TRANSCRIPT_MODE_NORMAL

See Also

Public Constructors

public AbsListView (Context context)

public AbsListView (Context context, AttributeSet attrs)

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

Public Methods

public void addTouchables (ArrayList<View> views)

Parameters

public void afterTextChanged (Editable s)

public void beforeTextChanged (CharSequence s, int start, int count, int after)

public boolean checkInputConnectionProxy (View view)

Parameters

Returns

public void clearTextFilter ()

public void draw (Canvas canvas)

Parameters

public AbsListView.LayoutParams generateLayoutParams (AttributeSet attrs)

Parameters

Returns

public int getCacheColorHint ()

Returns

public void getFocusedRect (Rect r)

Parameters

public int getListPaddingBottom ()

Returns

See Also

public int getListPaddingLeft ()

Returns

See Also

public int getListPaddingRight ()

Returns

See Also

public int getListPaddingTop ()

Returns

See Also

public View getSelectedView ()

Returns

public Drawable getSelector ()

Returns

public int getSolidColor ()

Returns

public CharSequence getTextFilter ()

Returns

public int getTranscriptMode ()

Returns

public boolean hasTextFilter ()

public void invalidateViews ()

public boolean isFastScrollEnabled ()