Java android.view ViewGroup fields, constructors, methods, implement or subclass

Introduction

In this page you can find the methods, fields and constructors for android.view ViewGroup.

The text is from its open source code.

Subclass

android.view.ViewGroup has subclasses.
Click this link to see all its subclasses.

Field

int	FOCUS_BEFORE_DESCENDANTS This view will get focus before any of its descendants.
int	FOCUS_AFTER_DESCENDANTS This view will get focus only if none of its descendants want it.
int	FOCUS_BLOCK_DESCENDANTS This view will block any of its descendants from getting focus, even if they are focusable.
int	PERSISTENT_ANIMATION_CACHE Used to indicate that the animation drawing cache should be kept in memory.
int	PERSISTENT_SCROLLING_CACHE Used to indicate that the scrolling drawing cache should be kept in memory.
int	PERSISTENT_ALL_CACHES Used to indicate that all drawing caches should be kept in memory.

Constructor

	ViewGroup(Context context)

Method

void	addOnAttachStateChangeListener(OnAttachStateChangeListener listener) Add a listener for attach state changes.
void	addView(View child) Adds a child view.
void	addView(View child, int width, int height) Adds a child view with this ViewGroup's default layout parameters and the specified width and height.
void	addView(View child, int index, LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, int index) Adds a child view.
void	addView(View child, LayoutParams params) Adds a child view with the specified layout parameters.
ViewPropertyAnimator	animate() This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
void	bringChildToFront(View child)
void	bringToFront() Change the view's z order in the tree, so it's on top of other sibling views.
void	buildDrawingCache() Calling this method is equivalent to calling `buildDrawingCache(false)`.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
boolean	dispatchTouchEvent(MotionEvent ev)
void	endViewTransition(View view) This method should always be called following an earlier call to #startViewTransition(View) .
T	findViewById(@IdRes int id) Finds the first descendant view with the given ID, the view itself if the ID matches #getId() , or null if the ID is invalid (< 0) or there is no matching view in the hierarchy.
void	findViewsWithText(ArrayList outViews, CharSequence text, int flags)
T	findViewWithTag(Object tag) Look for a child view with the given tag.
float	getAlpha() The opacity of the view.
Drawable	getBackground() Gets the background drawable
int	getBottom() Bottom position of this view relative to its parent.
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	getChildMeasureSpec(int spec, int padding, int childDimension) Does the hard part of measureChildren: figuring out the MeasureSpec to pass to a particular child.
Class	getClass() Returns the runtime class of this Object .
boolean	getClipChildren() Returns whether this group's children are clipped to their bounds before drawing.
Context	getContext() Returns the context the view is running in, through which it can access the current theme, resources, etc.
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.
ArrayList	getFocusables(@FocusDirection int direction) Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.
int	getHeight() Return the height of your view.
int	getId() Returns this view's identifier.
ViewGroup.LayoutParams	getLayoutParams() Get the LayoutParams associated with this view.
LayoutTransition	getLayoutTransition() Gets the LayoutTransition object for this ViewGroup.
int	getLeft() Left position of this view relative to its parent.
void	getLocationInWindow(@Size(2) int[] outLocation) Computes the coordinates of this view in its window.
void	getLocationOnScreen(@Size(2) int[] outLocation) Computes the coordinates of this view on the screen.
int	getMeasuredHeight() Like #getMeasuredHeightAndState() , but only returns the raw height component (that is the result is masked by #MEASURED_SIZE_MASK ).
int	getMeasuredWidth() Like #getMeasuredWidthAndState() , but only returns the raw width component (that is the result is masked by #MEASURED_SIZE_MASK ).
int	getMinimumHeight() Returns the minimum height of the view.
ViewGroupOverlay	getOverlay() Returns the ViewGroupOverlay for this view group, creating it if it does not yet exist.
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.
ViewParent	getParent() Gets the parent of this view.
Resources	getResources() Returns the resources associated with this view.
int	getRight() Right position of this view relative to its parent.
float	getScaleX() The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
int	getScrollX() Return the scrolled left position of this view.
int	getScrollY() Return the scrolled top position of this view.
Object	getTag() Returns this view's tag.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
int	getTop() Top position of this view relative to its parent.
ArrayList	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 #getLeft() left position.
float	getTranslationY() The vertical location of this view relative to its #getTop() top position.
ViewTreeObserver	getViewTreeObserver() Returns the ViewTreeObserver for this view's hierarchy.
int	getVisibility() Returns the visibility status for this view.
int	getWidth() Return the width of your view.
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 or contains focus
int	indexOfChild(View child) Returns the position in the group of the specified child view.
void	invalidate() Invalidate the whole view.
boolean	isLaidOut() Returns true if this view has been through at least one layout since it was last attached to or detached from a window.
boolean	isSelected() Indicates the selection state of this view.
boolean	isShown() Returns the visibility of this view and all of its ancestors
void	layout(int l, int t, int r, int b)
void	measure(int widthMeasureSpec, int heightMeasureSpec) This is called to find out how big a view should be.
void	offsetDescendantRectToMyCoords(View descendant, Rect rect) Offset a rectangle that is in a descendant's coordinate space into our coordinate space.
boolean	onInterceptTouchEvent(MotionEvent ev) Implement this method to intercept all touch screen motion events.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
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	postOnAnimationDelayed(Runnable action, long delayMillis) Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses.
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	removeView(View view) Note: do not invoke this method from #draw(android.graphics.Canvas) , #onDraw(android.graphics.Canvas) , #dispatchDraw(android.graphics.Canvas) or any related method.
void	removeViewAt(int index) Removes the view at the specified position in the group.
void	removeViewInLayout(View view) Removes a view during layout.
void	removeViews(int start, int count) Removes the specified range of views from the group.
void	requestChildFocus(View child, View focused)
boolean	requestFocus() 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	requestSendAccessibilityEvent(View child, AccessibilityEvent event)
void	requestTransparentRegion(View child)
void	setAccessibilityDelegate(@Nullable AccessibilityDelegate delegate) Sets a delegate for implementing accessibility support via composition (as opposed to inheritance).
void	setActivated(boolean activated) Changes the activated state of this view.
void	setAlpha(@FloatRange(from = 0.0, to = 1.0) float alpha) Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.
void	setAnimation(Animation animation) Sets the next animation to play for this view.
void	setAnimationCacheEnabled(boolean enabled) Enables or disables the children's drawing cache during a layout animation.
void	setBackground(Drawable background) Set the background to a given Drawable, or remove the background.
void	setBackgroundColor(@ColorInt int color) Sets the background color for this view.
void	setBackgroundDrawable(Drawable background)
void	setBackgroundResource(@DrawableRes int resid) Set the background to a given resource.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setClipChildren(boolean clipChildren) By default, children are clipped to their bounds before drawing.
void	setClipToPadding(boolean clipToPadding) Sets whether this ViewGroup will clip its children to its padding and resize (but not clip) any EdgeEffect to the padded region, if padding is present.
void	setContentDescription(CharSequence contentDescription) Sets the View 's content description.
void	setDescendantFocusability(int focusability) Set the descendant focusability of this view group.
void	setDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache.
void	setDrawingCacheQuality(@DrawingCacheQuality int quality) Set the drawing cache quality of this view.
void	setElevation(float elevation) Sets the base elevation of this view, in pixels.
void	setEnabled(boolean enabled) Set the enabled state of this view.
void	setFitsSystemWindows(boolean fitSystemWindows) Sets whether or not this view should account for system screen decorations such as the status bar and inset its content; that is, controlling whether the default implementation of #fitSystemWindows(Rect) will be executed.
void	setFocusable(boolean focusable) Set whether this view can receive the focus.
void	setFocusableInTouchMode(boolean focusableInTouchMode) Set whether this view can receive focus while in touch mode.
void	setForeground(Drawable foreground) Supply a Drawable that is to be rendered on top of all of the content in the view.
void	setId(@IdRes 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	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	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
void	setLayoutTransition(LayoutTransition transition) Sets the LayoutTransition object for this ViewGroup.
void	setMotionEventSplittingEnabled(boolean split) Enable or disable the splitting of MotionEvents to multiple children during touch event dispatch.
void	setOnClickListener(@Nullable OnClickListener l) Register a callback to be invoked when this view is clicked.
void	setOnHierarchyChangeListener(OnHierarchyChangeListener listener) Register a callback to be invoked when a child is added to or removed from this view.
void	setOnLongClickListener(@Nullable OnLongClickListener l) Register a callback to be invoked when this view is clicked and held.
void	setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) Set a listener to receive callbacks when the visibility of the system bar changes.
void	setOnTouchListener(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 state for this view.
void	setScrollY(int value) Set the vertical scrolled position of your view.
void	setSelected(boolean selected) Changes the selection state of this view.
void	setTag(int key, final Object tag) Sets a tag associated with this view and a key.
void	setTag(final Object tag) Sets the tag associated with this view.
void	setTranslationY(float translationY) Sets the vertical location of this view relative to its #getTop() top position.
void	setVisibility(@Visibility int visibility) Set the visibility state of this view.
void	setWillNotDraw(boolean willNotDraw) If this view doesn't do any drawing on its own, set this flag to allow further optimizations.
void	startAnimation(Animation animation) Start the specified animation now.
void	startViewTransition(View view) This method tells the ViewGroup that the given View object, which should have this ViewGroup as its parent, should be kept around (re-displayed when the ViewGroup draws its children) even if it is removed from its parent.