android View全面详解2

Nested Classes
class	View.AccessibilityDelegate	This class represents a delegate that can be registered in a View to enhance accessibility support via composition rather via inheritance.
class	View.BaseSavedState	Base class for derived classes that want to save and restore their own state in onSaveInstanceState().
class	View.DragShadowBuilder	Creates an image that the system displays during the drag and drop operation.
class	View.MeasureSpec	A MeasureSpec encapsulates the layout requirements passed from parent to child.
interface	View.OnAttachStateChangeListener	Interface definition for a callback to be invoked when this view is attached or detached from its window.
interface	View.OnClickListener	Interface definition for a callback to be invoked when a view is clicked.
interface	View.OnCreateContextMenuListener	Interface definition for a callback to be invoked when the context menu for this view is being built.
interface	View.OnDragListener	Interface definition for a callback to be invoked when a drag is being dispatched to this view.
interface	View.OnFocusChangeListener	Interface definition for a callback to be invoked when the focus state of a view changed.
interface	View.OnGenericMotionListener	Interface definition for a callback to be invoked when a generic motion event is dispatched to this view.
interface	View.OnHoverListener	Interface definition for a callback to be invoked when a hover(盘旋) event is dispatched to this view. 处理光标悬停的回调.4.0的新特性
interface	View.OnKeyListener	Interface definition for a callback to be invoked when a key event is dispatched to this view.
interface	View.OnLayoutChangeListener	Interface definition for a callback to be invoked when the layout bounds of a view changes due to layout processing.
interface	View.OnLongClickListener	Interface definition for a callback to be invoked when a view has been clicked and held.
interface	View.OnSystemUiVisibilityChangeListener	Interface definition for a callback to be invoked when the status bar changes visibility.
interface	View.OnTouchListener	Interface definition for a callback to be invoked when a touch event is dispatched to this view.

上表中的Interface都是一些操作的回调方法.

 

XML Attributes
Attribute Name	Related Method	Description
android:alpha	setAlpha(float)	alpha property of the view, as a value between 0 (completely transparent(透明的,显然的)) and 1 (completely opaque).
android:background	setBackgroundResource(int)	A drawable to use as the background. 设置背景色/背景图片。可以通过以下两种方法设置背景为透明："@android:color/transparent"和"@null"。注意TextView默认是透明的，不用写此属性，但是Buttom/ImageButton/ImageView想透明的话就得写这个属性了。
android:clickable	setClickable(boolean)	Defines whether this view reacts to click events.
android:contentDescription	setContentDescription(CharSequence)	Defines text that briefly describes content of the view. 设置View的备注说明，作为一种辅助功能提供,为一些没有文字描述的View提供说明，如ImageButton。这里在界面上不会有效果，自己在程序中控制，可临时放一点字符串数据。
android:drawingCacheQuality	setDrawingCacheQuality(int)	Defines the quality of translucent(透明的,半透明的) drawing caches. 设置绘图时半透明质量。有以下值可设置：auto（默认，由框架决定）/high（高质量，使用较高的颜色深度，消耗更多的内存/low（低质量，使用较低的颜色深度，但是用更少的内存）。
android:duplicateParentState		When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself.
android:fadingEdgeLength	getVerticalFadingEdgeLength()	Defines the length of the fading edges. 还有一个属性:android:fadingEdge , 不知道怎么没写, 是忘写了还是怎么的,文档没有,但是可以设置出来.网上的说明为:设置拉滚动条时 ，边框渐变的放向。none（边框颜色不变），horizontal（水平方向颜色变淡），vertical（垂直方向颜色变淡）。参照fadingEdgeLength的效果图 不知道怎么回事, 我设置这两个属性没有效果,难道是要拉滚动条什么的? 网上的该属性效果:设置边框渐变的长度。
android:filterTouchesWhenObscured	setFilterTouchesWhenObscured(boolean)	Specifies whether to filter touches when the view's window is obscured by another visible window.
android:fitsSystemWindows	setFitsSystemWindows(boolean)	Boolean internal attribute to adjust view layout based on system windows such as the status bar.
android:focusable	setFocusable(boolean)	Boolean that controls whether a view can take focus.
android:focusableInTouchMode	setFocusableInTouchMode(boolean)	Boolean that controls whether a view can take focus while in touch mode.
android:hapticFeedbackEnabled	setHapticFeedbackEnabled(boolean)	Boolean that controls whether a view should have haptic(触觉的) feedback enabled for events such as long presses.
android:id	setId(int)	Supply an identifier name for this view, to later retrieve it with View.findViewById() orActivity.findViewById().
android:isScrollContainer		Set this if the view will serve as a scrolling container, meaing that it can be resized to shrink its overall window so that there will be space for an input method.
android:keepScreenOn	setKeepScreenOn(boolean)	Controls whether the view's window should keep the screen on while visible.
android:layerType	setLayerType(int,Paint)	Specifies the type of layer backing this view.
android:longClickable	setLongClickable(boolean)	Defines whether this view reacts to long click events.
android:minHeight		Defines the minimum height of the view.
android:minWidth		Defines the minimum width of the view.
android:nextFocusDown	setNextFocusDownId(int)	Defines the next view to give focus to when the next focus is FOCUS_DOWN If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.
android:nextFocusForward	setNextFocusForwardId(int)	Defines the next view to give focus to when the next focus is FOCUS_FORWARD If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.
android:nextFocusLeft	setNextFocusLeftId(int)	Defines the next view to give focus to when the next focus is FOCUS_LEFT.
android:nextFocusRight	setNextFocusRightId(int)	Defines the next view to give focus to when the next focus is FOCUS_RIGHT If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.
android:nextFocusUp	setNextFocusUpId(int)	Defines the next view to give focus to when the next focus is FOCUS_UP If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.
android:onClick		Name of the method in this View's context to invoke when the view is clicked.
android:padding	setPadding(int,int,int,int)	Sets the padding, in pixels, of all four edges.
android:paddingBottom	setPadding(int,int,int,int)	Sets the padding, in pixels, of the bottom edge; see padding.
android:paddingLeft	setPadding(int,int,int,int)	Sets the padding, in pixels, of the left edge; see padding.
android:paddingRight	setPadding(int,int,int,int)	Sets the padding, in pixels, of the right edge; see padding.
android:paddingTop	setPadding(int,int,int,int)	Sets the padding, in pixels, of the top edge; see padding.
android:requiresFadingEdge	setVerticalFadingEdgeEnabled(boolean)	Defines which edges should be faded on scrolling.
android:rotation	setRotation(float)	rotation of the view, in degrees.
android:rotationX	setRotationX(float)	rotation of the view around the x axis, in degrees.
android:rotationY	setRotationY(float)	rotation of the view around the y axis, in degrees.
android:saveEnabled	setSaveEnabled(boolean)	If unset, no state will be saved for this view when it is being frozen.
android:scaleX	setScaleX(float)	scale of the view in the x direction.
android:scaleY	setScaleY(float)	scale of the view in the y direction.
android:scrollX		The initial horizontal scroll offset, in pixels.
android:scrollY		The initial vertical scroll offset, in pixels.
android:scrollbarAlwaysDrawHorizontalTrack		Defines whether the horizontal scrollbar track should always be drawn.
android:scrollbarAlwaysDrawVerticalTrack		Defines whether the vertical scrollbar track should always be drawn.
android:scrollbarDefaultDelayBeforeFade		Defines the delay in milliseconds that a scrollbar waits before fade out.
android:scrollbarFadeDuration		Defines the delay in milliseconds that a scrollbar takes to fade out.
android:scrollbarSize		Sets the width of vertical scrollbars and height of horizontal scrollbars.
android:scrollbarStyle		Controls the scrollbar style and position.
android:scrollbarThumbHorizontal		Defines the horizontal scrollbar thumb drawable.
android:scrollbarThumbVertical		Defines the vertical scrollbar thumb drawable.
android:scrollbarTrackHorizontal		Defines the horizontal scrollbar track drawable.
android:scrollbarTrackVertical		Defines the vertical scrollbar track drawable.
android:scrollbars		Defines which scrollbars should be displayed on scrolling or not.
android:soundEffectsEnabled	setSoundEffectsEnabled(boolean)	Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching.
android:tag	这里怎么没写setTag()?	Supply a tag for this view containing a String, to be retrieved later with View.getTag() or searched for withView.findViewWithTag().
android:transformPivotX	setPivotX(float)	x location of the pivot point around which the view will rotate and scale.
android:transformPivotY	setPivotY(float)	y location of the pivot point around which the view will rotate and scale.
android:translationX	setTranslationX(float)	translation in x of the view.
android:translationY	setTranslationY(float)	translation in y of the view.
android:visibility	setVisibility(int)	Controls the initial visibility of the view.

从这里也可以看出上文说的, 有pading, 没有margin, 去eclise里试了一下, 有margin, 是layout_margin, layout定义的是在父容器的位置.

 

Constants
int	DRAWING_CACHE_QUALITY_AUTO	Enables automatic quality mode for the drawing cache.
int	DRAWING_CACHE_QUALITY_HIGH	Enables high quality mode for the drawing cache.
int	DRAWING_CACHE_QUALITY_LOW	Enables low quality mode for the drawing cache.
int	FIND_VIEWS_WITH_CONTENT_DESCRIPTION	Find find views that contain the specified content description.
int	FIND_VIEWS_WITH_TEXT	Find views that render the specified text.
int	FOCUSABLES_ALL	View flag indicating whether , int, int)">addFocusables(ArrayList, int, int) should add all focusable Views regardless if they are focusable in touch mode.
int	FOCUSABLES_TOUCH_MODE	View flag indicating whether , int, int)">addFocusables(ArrayList, int, int) should add only Views focusable in touch mode.
int	FOCUS_BACKWARD	Use with focusSearch(int).
int	FOCUS_DOWN	Use with focusSearch(int).
int	FOCUS_FORWARD	Use with focusSearch(int).
int	FOCUS_LEFT	Use with focusSearch(int).
int	FOCUS_RIGHT	Use with focusSearch(int).
int	FOCUS_UP	Use with focusSearch(int).
int	GONE	This view is invisible, and it doesn't take any space for layout purposes.
int	HAPTIC_FEEDBACK_ENABLED	View flag indicating whether this view should have haptic feedback enabled for events such as long presses.
int	INVISIBLE	This view is invisible, but it still takes up space for layout purposes.
int	KEEP_SCREEN_ON	View flag indicating that the screen should remain on while the window containing this view is visible to the user.
int	LAYER_TYPE_HARDWARE	Indicates that the view has a hardware layer. 如果应用被硬加速了，view会被绘制到一个硬件纹理中．如果应用没被硬加速，此类型的layer的行为同于LAYER_TYPE_SOFTWARE．
int	LAYER_TYPE_NONE	Indicates that the view does not have a layer. view按一般方式绘制，不使用离屏缓冲．这是默认的行为．
int	LAYER_TYPE_SOFTWARE	Indicates that the view has a software layer. view被绘制到一个bitmap中．
int	MEASURED_HEIGHT_STATE_SHIFT	Bit shift of MEASURED_STATE_MASK to get to the height bits for functions that combine both width and height into a single int, such asgetMeasuredState() and the childState argument of resolveSizeAndState(int, int, int).
int	MEASURED_SIZE_MASK	Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the actual measured size.
int	MEASURED_STATE_MASK	Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the additional state bits.
int	MEASURED_STATE_TOO_SMALL	Bit of getMeasuredWidthAndState() and getMeasuredWidthAndState() that indicates the measured size is smaller that the space the view would like to have.
int	NO_ID	Used to mark a View that has no ID.
int	OVER_SCROLL_ALWAYS	Always allow a user to over-scroll this view, provided it is a view that can scroll.
int	OVER_SCROLL_IF_CONTENT_SCROLLS	Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll.
int	OVER_SCROLL_NEVER	Never allow a user to over-scroll this view.
int	SCROLLBARS_INSIDE_INSET	The scrollbar style to display the scrollbars inside the padded area, increasing the padding of the view.
int	SCROLLBARS_INSIDE_OVERLAY	The scrollbar style to display the scrollbars inside the content area, without increasing the padding.
int	SCROLLBARS_OUTSIDE_INSET	The scrollbar style to display the scrollbars at the edge of the view, increasing the padding of the view.
int	SCROLLBARS_OUTSIDE_OVERLAY	The scrollbar style to display the scrollbars at the edge of the view, without increasing the padding.
int	SCROLLBAR_POSITION_DEFAULT	Position the scroll bar at the default position as determined by the system.
int	SCROLLBAR_POSITION_LEFT	Position the scroll bar along the left edge.
int	SCROLLBAR_POSITION_RIGHT	Position the scroll bar along the right edge.
int	SOUND_EFFECTS_ENABLED	View flag indicating whether this view should have sound effects enabled for events such as clicking and touching.
int	STATUS_BAR_HIDDEN	This constant is deprecated. Use SYSTEM_UI_FLAG_LOW_PROFILE instead.
int	STATUS_BAR_VISIBLE	This constant is deprecated. Use SYSTEM_UI_FLAG_VISIBLE instead.
int	SYSTEM_UI_FLAG_HIDE_NAVIGATION	View has requested that the system navigation be temporarily hidden.
int	SYSTEM_UI_FLAG_LOW_PROFILE	View has requested the system UI to enter an unobtrusive "low profile" mode.
int	SYSTEM_UI_FLAG_VISIBLE	View has requested the system UI (status bar) to be visible (the default).
String	VIEW_LOG_TAG	The logging tag used by this class with android.util.Log.
int	VISIBLE	This view is visible.

从这向下还没有看, 以后再看吧. Public Constructors
	View(Context context) Simple constructor to use when creating a view from code.
	View(Context context, AttributeSet attrs) Constructor that is called when inflating a view from XML.
	View(Context context, AttributeSet attrs, int defStyle) Perform inflation from XML and apply a class-specific base style.

Public Methods
void	, int)">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	, int, int)">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	addOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Add a listener for attach state changes.
void	addOnLayoutChangeListener(View.OnLayoutChangeListener listener) Add a listener that will be called when the bounds of the view change due to layout processing.
void	)">addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
ViewPropertyAnimator	animate() This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
void	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	buildLayer() Forces this view's layer to be created and this view to be rendered into its layer.
boolean	callOnClick() Directly call any attached OnClickListener.
boolean	canScrollHorizontally(int direction) Check if this view can be scrolled horizontally in a certain direction.
boolean	canScrollVertically(int direction) Check if this view can be scrolled vertically in a certain direction.
void	cancelLongPress() Cancels a pending long press.
boolean	checkInputConnectionProxy(View view) Called by the   InputMethodManager  when a view who is not the current input connection target is trying to make a call on the manager.
void	clearAnimation() Cancels any animations for this view.
void	clearFocus() Called when this view wants to give up focus.
static int	combineMeasuredStates(int curState, int newState) Merge two states as returned by   getMeasuredState().
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
AccessibilityNodeInfo	createAccessibilityNodeInfo() Returns an   AccessibilityNodeInfo  representing this view from the point of view of an   AccessibilityService.
void	createContextMenu(ContextMenu menu) Show the context menu for this view.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
boolean	dispatchDragEvent(DragEvent event) Detects if this View is enabled and has a drag event listener.
boolean	dispatchGenericMotionEvent(MotionEvent event) Dispatch a generic motion event.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
boolean	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an   AccessibilityEvent  to the   View  first and then to its children for adding their text content to the event.
void	dispatchSystemUiVisibilityChanged(int visibility) Dispatch callbacks to   setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener)  down the view hierarchy.
boolean	dispatchTouchEvent(MotionEvent event) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	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.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
final View	findViewById(int id) Look for a child view with the given id.
final View	findViewWithTag(Object tag) Look for a child view with the given tag.
void	, java.lang.CharSequence, int)">findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) Finds the Views that contain given text.
boolean	fitsSystemWindows() Check for the FITS_SYSTEM_WINDOWS flag.
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.
float	getAlpha() The opacity of the view.
Animation	getAnimation() Get the animation currently associated with this view.
IBinder	getApplicationWindowToken() Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to.
Drawable	getBackground() Gets the background drawable
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.
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.
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(boolean autoScale) Returns the bitmap in which this view drawing is cached.
Bitmap	getDrawingCache() Calling this method is equivalent to calling getDrawingCache(false).
int	getDrawingCacheBackgroundColor()
int	getDrawingCacheQuality() Returns the quality of the drawing cache.
void	getDrawingRect(Rect outRect) Return the visible drawing bounds of your view.
long	getDrawingTime() Return the time at which the drawing of the view hierarchy started.
boolean	getFilterTouchesWhenObscured() Gets whether the framework should discard touches when the view's window is obscured by another visible window.
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	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.
int	getLayerType() Indicates what type of layer is currently associated with this view.
ViewGroup.LayoutParams	getLayoutParams() Get the LayoutParams associated with this view.
final int	getLeft() Left position of this view relative to its parent.
final boolean	getLocalVisibleRect(Rect r)
void	getLocationInWindow(int[] location) Computes the coordinates of this view in its window.
void	getLocationOnScreen(int[] location) Computes the coordinates of this view on the screen.
Matrix	getMatrix() The transform matrix of this view, which is calculated based on the current roation, scale, and pivot properties.
final int	getMeasuredHeight() Like   getMeasuredHeightAndState(), but only returns the raw width component (that is the result is masked by   MEASURED_SIZE_MASK).
final int	getMeasuredHeightAndState() Return the full height measurement information for this view as computed by the most recent call to   measure(int, int).
final int	getMeasuredState() Return only the state bits of   getMeasuredWidthAndState()  and   getMeasuredHeightAndState(), combined into one integer.
final int	getMeasuredWidth() Like   getMeasuredWidthAndState(), but only returns the raw width component (that is the result is masked by   MEASURED_SIZE_MASK).
final int	getMeasuredWidthAndState() Return the full width measurement information for this view as computed by the most recent call to   measure(int, int).
int	getNextFocusDownId() Gets the id of the view to use when the next focus is   FOCUS_DOWN.
int	getNextFocusForwardId() Gets the id of the view to use when the next focus is   FOCUS_FORWARD.
int	getNextFocusLeftId() Gets the id of the view to use when the next focus is   FOCUS_LEFT.
int	getNextFocusRightId() Gets the id of the view to use when the next focus is   FOCUS_RIGHT.
int	getNextFocusUpId() Gets the id of the view to use when the next focus is   FOCUS_UP.
View.OnFocusChangeListener	getOnFocusChangeListener() Returns the focus-change callback registered for this view.
int	getOverScrollMode() Returns the over-scroll mode 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.
float	getPivotX() The x location of the point around which the view is   rotated  and   scaled.
float	getPivotY() The y location of the point around which the view is   rotated  and   scaled.
abstract int	getResolvedLayoutDirection(Drawable who) A Drawable can call this to get the resolved layout direction of the   who.
Resources	getResources() Returns the resources associated with this view.
final int	getRight() Right position of this view relative to its parent.
View	getRootView() Finds the topmost view in the current view hierarchy.
float	getRotation() The degrees that the view is rotated around the pivot point.
float	getRotationX() The degrees that the view is rotated around the horizontal axis through the pivot point.
float	getRotationY() The degrees that the view is rotated around the vertical axis through the pivot point.
float	getScaleX() The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
float	getScaleY() The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height.
int	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	getSystemUiVisibility() Returns the status bar visibility that this view has requested.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
Object	getTag() Returns this view's tag.
final int	getTop() Top position of this view relative to its parent.
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.
float	getTranslationX() The horizontal location of this view relative to its   left  position.
float	getTranslationY() The horizontal location of this view relative to its   top  position.
int	getVerticalFadingEdgeLength() Returns the size of the vertical faded edges used to indicate that more content in this view is visible.
int	getVerticalScrollbarPosition()
int	getVerticalScrollbarWidth() Returns the width of the vertical scrollbar.
ViewTreeObserver	getViewTreeObserver() Returns the ViewTreeObserver for this view's hierarchy.
int	getVisibility() Returns the visibility status for this view.
final int	getWidth() Return the width of the your view.
IBinder	getWindowToken() Retrieve a unique token identifying the window this view is attached to.
int	getWindowVisibility() Returns the current visibility of the window this view is attached to (either   GONE,   INVISIBLE, or   VISIBLE).
void	getWindowVisibleDisplayFrame(Rect outRect) Retrieve the overall visible display size in which the window this view is attached to has been positioned in.
float	getX() The visual x position of this view, in pixels.
float	getY() The visual y position of this view, in pixels.
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	hasOnClickListeners() Return whether this view has an attached OnClickListener.
boolean	hasWindowFocus() Returns true if this view is in a window that currently has window focus.
static View	inflate(Context context, int resource, ViewGroup root) Inflate a view from an XML resource.
void	invalidate(Rect dirty) Mark the area defined by dirty as needing to be drawn.
void	invalidate(int l, int t, int r, int b) Mark the area defined by the rect (l,t,r,b) as needing to be drawn.
void	invalidate() Invalidate the whole view.
void	invalidateDrawable(Drawable drawable) Invalidates the specified Drawable.
boolean	isActivated() Indicates the activation state of this view.
boolean	isClickable() Indicates whether this view reacts to click events or not.
boolean	isDirty() True if this view has changed since the last time being drawn.
boolean	isDrawingCacheEnabled() Indicates whether the drawing cache is enabled for this view.
boolean	isDuplicateParentStateEnabled() Indicates whether this duplicates its drawable state from its parent.
boolean	isEnabled() Returns the enabled status for this view.
final boolean	isFocusable() Returns whether this View is able to take focus.
final boolean	isFocusableInTouchMode() When a view is focusable, it may not want to take focus when in touch mode.
boolean	isFocused() Returns true if this view has focus
boolean	isHapticFeedbackEnabled()
boolean	isHardwareAccelerated() Indicates whether this view is attached to an hardware accelerated window or not.
boolean	isHorizontalFadingEdgeEnabled() Indicate whether the horizontal edges are faded when the view is scrolled horizontally.
boolean	isHorizontalScrollBarEnabled() Indicate whether the horizontal scrollbar should be drawn or not.
boolean	isHovered() Returns true if the view is currently hovered.
boolean	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	isPressed() Indicates whether the view is currently in pressed state.
boolean	isSaveEnabled() Indicates whether this view will save its state (that is, whether its   onSaveInstanceState()  method will be called).
boolean	isSaveFromParentEnabled() Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
boolean	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.
void	jumpDrawablesToCurrentState() Call   Drawable.jumpToCurrentState()  on all Drawable objects associated with this view.
void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
final void	measure(int widthMeasureSpec, int heightMeasureSpec) This is called to find out how big a view should be.
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.
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.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
boolean	onDragEvent(DragEvent event) Handles drag events sent by the system following a call to   startDrag().
boolean	onFilterTouchEventForSecurity(MotionEvent event) Filter the touch event to apply security policies.
void	onFinishTemporaryDetach() Called after   onStartTemporaryDetach()  when the container is done changing the view.
boolean	onGenericMotionEvent(MotionEvent event) Implement this method to handle generic motion events.
void	onHoverChanged(boolean hovered) Implement this method to handle hover state changes.
boolean	onHoverEvent(MotionEvent event) Implement this method to handle hover events.
void	onInitializeAccessibilityEvent(AccessibilityEvent event) Initializes an   AccessibilityEvent  with information about this View which is the event source.
void	onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) Initializes an   AccessibilityNodeInfo  with information about this view.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of   KeyEvent.Callback.onKeyDown(): perform press of the view when   KEYCODE_DPAD_CENTER  or   KEYCODE_ENTER  is released, if the view is enabled and clickable.
boolean	onKeyLongPress(int keyCode, KeyEvent event) Default implementation of   KeyEvent.Callback.onKeyLongPress(): always returns false (doesn't handle the event).
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of   KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).
boolean	onKeyPreIme(int keyCode, KeyEvent event) Handle a key event before it is processed by any input method associated with the view hierarchy.
boolean	onKeyShortcut(int keyCode, KeyEvent event) Called on the focused view when a key shortcut event is not handled.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of   KeyEvent.Callback.onKeyUp(): perform clicking of the view when   KEYCODE_DPAD_CENTER  or   KEYCODE_ENTER  is released.
void	onPopulateAccessibilityEvent(AccessibilityEvent event) Called from   dispatchPopulateAccessibilityEvent(AccessibilityEvent)  giving a chance to this View to populate the accessibility event with its text content.
void	onStartTemporaryDetach() This is called when a container is going to temporarily detach a child, with   ViewGroup.detachViewFromParent.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent event) Implement this method to handle trackball motion events.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
boolean	performClick() Call this view's OnClickListener, if it is defined.
boolean	performHapticFeedback(int feedbackConstant, int flags) BZZZTT!!1! Like performHapticFeedback(int), with additional options.
boolean	performHapticFeedback(int feedbackConstant) BZZZTT!!1! Provide haptic feedback to the user for this view.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	playSoundEffect(int soundConstant) Play a sound effect for this view.
boolean	post(Runnable action) Causes the Runnable to be added to the message queue.
boolean	postDelayed(Runnable action, long delayMillis) Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses.
void	postInvalidate(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidate() Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds) Cause an invalidate to happen on a subsequent cycle through the event loop.
void	refreshDrawableState() Call this to force a view to update its drawable state.
boolean	removeCallbacks(Runnable action) Removes the specified Runnable from the message queue.
void	removeOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Remove a listener for attach state changes.
void	removeOnLayoutChangeListener(View.OnLayoutChangeListener listener) Remove a listener for layout changes.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from.
final boolean	requestFocus(int direction) Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading.
final boolean	requestFocus() Call this to try to give focus to a specific view or to one of its descendants.
final boolean	requestFocusFromTouch() Call this to try to give focus to a specific view or to one of its descendants.
void	requestLayout() Call this when something has changed which has invalidated the layout of this view.
boolean	requestRectangleOnScreen(Rect rectangle) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
boolean	requestRectangleOnScreen(Rect rectangle, boolean immediate) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
static int	resolveSize(int size, int measureSpec) Version of   resolveSizeAndState(int, int, int)  returning only the   MEASURED_SIZE_MASK  bits of the result.
static int	resolveSizeAndState(int size, int measureSpec, int childMeasuredState) Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec.
void	)">restoreHierarchyState(SparseArray<Parcelable> container) Restore this view hierarchy's frozen state from the given container.
void	)">saveHierarchyState(SparseArray<Parcelable> container) Store this view hierarchy's frozen state into the given container.
void	scheduleDrawable(Drawable who, Runnable what, long when) Schedules an action on a drawable to occur at a specified time.
void	scrollBy(int x, int y) Move the scrolled position of your view.
void	scrollTo(int x, int y) Set the scrolled position of your view.
void	sendAccessibilityEvent(int eventType) Sends an accessibility event of the given type.
void	sendAccessibilityEventUnchecked(AccessibilityEvent event) This method behaves exactly as   sendAccessibilityEvent(int)  but takes as an argument an empty   AccessibilityEvent  and does not perform a check whether accessibility is enabled.
void	setAccessibilityDelegate(View.AccessibilityDelegate delegate) Sets a delegate for implementing accessibility support via compositon as opposed to inheritance.
void	setActivated(boolean activated) Changes the activated state of this view.
void	setAlpha(float alpha) Sets the opacity of the view.
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.
final void	setBottom(int bottom) Sets the bottom position of this view relative to its parent.
void	setCameraDistance(float distance) Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setContentDescription(CharSequence contentDescription) Sets the   View  description.
void	setDrawingCacheBackgroundColor(int color) Setting a solid background color for the drawing cache's bitmaps will improve performance and memory usage.
void	setDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache.
void	setDrawingCacheQuality(int quality) Set the drawing cache quality of this view.
void	setDuplicateParentStateEnabled(boolean enabled) Enables or disables the duplication of the parent's state into this view.
void	setEnabled(boolean enabled) Set the enabled state of this view.
void	setFadingEdgeLength(int length) Set the size of the faded edge used to indicate that more content in this view is available.
void	setFilterTouchesWhenObscured(boolean enabled) Sets whether the framework should discard touches when the view's window is obscured by another visible window.
void	setFitsSystemWindows(boolean fitSystemWindows) Set whether or not this view should account for system screen decorations such as the status bar and inset its content.
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	setHovered(boolean hovered) Sets whether the view is currently hovered.
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	setLayerType(int layerType, Paint paint) Specifies the type of layer backing this view.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
final void	setLeft(int left) Sets the left position of this view relative to its parent.
void	setLongClickable(boolean longClickable) Enables or disables long click events for this view.
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) Sets the id of the view to use when the next focus is   FOCUS_DOWN.
void	setNextFocusForwardId(int nextFocusForwardId) Sets the id of the view to use when the next focus is   FOCUS_FORWARD.
void	setNextFocusLeftId(int nextFocusLeftId) Sets the id of the view to use when the next focus is   FOCUS_LEFT.
void	setNextFocusRightId(int nextFocusRightId) Sets the id of the view to use when the next focus is   FOCUS_RIGHT.
void	setNextFocusUpId(int nextFocusUpId) Sets the id of the view to use when the next focus is   FOCUS_UP.
void	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	setOnDragListener(View.OnDragListener l) Register a drag event listener callback object for this View.
void	setOnFocusChangeListener(View.OnFocusChangeListener l) Register a callback to be invoked when focus of this view changed.
void	setOnGenericMotionListener(View.OnGenericMotionListener l) Register a callback to be invoked when a generic motion event is sent to this view.
void	setOnHoverListener(View.OnHoverListener l) Register a callback to be invoked when a hover event is sent to this view.
void	setOnKeyListener(View.OnKeyListener l) Register a callback to be invoked when a 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	setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener l) Set a listener to receive callbacks when the visibility of the system bar changes.
void	setOnTouchListener(View.OnTouchListener l) Register a callback to be invoked when a touch event is sent to this view.
void	setOverScrollMode(int overScrollMode) Set the over-scroll mode for this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPivotX(float pivotX) Sets the x location of the point around which the view is   rotated  and   scaled.
void	setPivotY(float pivotY) Sets the y location of the point around which the view is   rotated  and   scaled.
void	setPressed(boolean pressed) Sets the pressed state for this view.
final void	setRight(int right) Sets the right position of this view relative to its parent.
void	setRotation(float rotation) Sets the degrees that the view is rotated around the pivot point.
void	setRotationX(float rotationX) Sets the degrees that the view is rotated around the horizontal axis through the pivot point.
void	setRotationY(float rotationY) Sets the degrees that the view is rotated around the vertical axis through the pivot point.
void	setSaveEnabled(boolean enabled) Controls whether the saving of this view's state is enabled (that is, whether its   onSaveInstanceState()  method will be called).
void	setSaveFromParentEnabled(boolean enabled) Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
void	setScaleX(float scaleX) Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
void	setScaleY(float scaleY) Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width.
void	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	setScrollX(int value) Set the horizontal scrolled position of your view.
void	setScrollY(int value) Set the vertical scrolled position of your view.
void	setScrollbarFadingEnabled(boolean fadeScrollbars) Define whether scrollbars will fade when the view is not scrolling.
void	setSelected(boolean selected) Changes the selection state of this view.
void	setSoundEffectsEnabled(boolean soundEffectsEnabled) Set whether this view should have sound effects enabled for events such as clicking and touching.
void	setSystemUiVisibility(int visibility) Request that the visibility of the status bar be changed.
void	setTag(int key, Object tag) Sets a tag associated with this view and a key.
void	setTag(Object tag) Sets the tag associated with this view.
final void	setTop(int top) Sets the top position of this view relative to its parent.
void	setTouchDelegate(TouchDelegate delegate) Sets the TouchDelegate for this View.
void	setTranslationX(float translationX) Sets the horizontal location of this view relative to its   left  position.
void	setTranslationY(float translationY) Sets the vertical location of this view relative to its   top  position.
void	setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) Define whether the vertical edges should be faded when this view is scrolled vertically.
void	setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) Define whether the vertical scrollbar should be drawn or not.
void	setVerticalScrollbarPosition(int position) Set the position of the vertical scroll bar.
void	setVisibility(int visibility) Set the enabled state of this view.
void	setWillNotCacheDrawing(boolean willNotCacheDrawing) When a View's drawing cache is enabled, drawing is redirected to an offscreen bitmap.
void	setWillNotDraw(boolean willNotDraw) If this view doesn't do any drawing on its own, set this flag to allow further optimizations.
void	setX(float x) Sets the visual x position of this view, in pixels.
void	setY(float y) Sets the visual y position of this view, in pixels.
boolean	showContextMenu() Bring up the context menu for this view.
ActionMode	startActionMode(ActionMode.Callback callback) Start an action mode.
void	startAnimation(Animation animation) Start the specified animation now.
final boolean	startDrag(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags) Starts a drag and drop operation.
void	unscheduleDrawable(Drawable who) Unschedule any events associated with the given Drawable.
void	unscheduleDrawable(Drawable who, Runnable what) Cancels a scheduled action on a drawable.
boolean	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.

Protected Methods
boolean	awakenScrollBars(int startDelay) Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay, boolean invalidate) Trigger the scrollbars to draw.
boolean	awakenScrollBars() Trigger the scrollbars to draw.
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.
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.
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchGenericPointerEvent(MotionEvent event) Dispatch a generic motion event to the view under the first pointer.
boolean	dispatchHoverEvent(MotionEvent event) Dispatch a hover event.
void	)">dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by   )">restoreHierarchyState(android.util.SparseArray)  to retrieve the state for this view and its children.
void	)">dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by   )">saveHierarchyState(android.util.SparseArray)  to store the state for this view and its children.
void	dispatchSetActivated(boolean activated) Dispatch setActivated to all of this View's children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
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.
boolean	fitSystemWindows(Rect insets) Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag is set
float	getBottomFadingEdgeStrength() Returns the strength, or intensity, of the bottom faded edge.
int	getBottomPaddingOffset() Amount by which to extend the bottom fading region.
ContextMenu.ContextMenuInfo	getContextMenuInfo() Views should implement this if they have extra information to associate with the context menu.
int	getHorizontalScrollbarHeight() Returns the height of the horizontal scrollbar.
float	getLeftFadingEdgeStrength() Returns the strength, or intensity, of the left faded edge.
int	getLeftPaddingOffset() Amount by which to extend the left fading region.
float	getRightFadingEdgeStrength() Returns the strength, or intensity, of the right faded edge.
int	getRightPaddingOffset() Amount by which to extend the right fading region.
int	getSuggestedMinimumHeight() Returns the suggested minimum height that the view should use.
int	getSuggestedMinimumWidth() Returns the suggested minimum width that the view should use.
float	getTopFadingEdgeStrength() Returns the strength, or intensity, of the top faded edge.
int	getTopPaddingOffset() Amount by which to extend the top fading region.
int	getWindowAttachCount()
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.
boolean	isPaddingOffsetRequired() If the View draws content inside its padding and enables fading edges, it needs to support padding offsets.
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	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.
void	onConfigurationChanged(Configuration newConfig) Called when the current configuration of the resources being used by the application have changed.
void	onCreateContextMenu(ContextMenu menu) Views should implement this if the view itself is going to add items to the context menu.
int[]	onCreateDrawableState(int extraSpace) Generate the new   Drawable  state for this view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
void	onDisplayHint(int hint) Gives this view a hint about whether is displayed or not.
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	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 left, int top, int right, int bottom) Called from layout when this view should assign a size and position to each of its children.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by   overScrollBy(int, int, int, int, int, int, int, int, boolean)  to respond to the results of an over-scroll operation.
void	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	onVisibilityChanged(View changedView, int visibility) Called when the visibility of the view or an ancestor of the view is changed.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between   GONE,   INVISIBLE, and   VISIBLE).
boolean	overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) Scroll the view with standard behavior for scrolling beyond the normal content boundaries.
final void	setMeasuredDimension(int measuredWidth, int measuredHeight) This mehod must be called by onMeasure(int, int) to store the measured width and measured height.
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.

[Expand] Inherited Methods
From class java.lang.Object
From interface android.graphics.drawable.Drawable.Callback
From interface android.view.KeyEvent.Callback
From interface android.view.accessibility.AccessibilityEventSource