ViewParent

Change the z order of the child so it's on top of all other children. This ordering change may affect layout, if this container uses an order-dependent layout scheme (e.g., LinearLayout). Prior to KITKAT this method should be followed by calls to requestLayout() and invalidate() on this parent to force the parent to redraw with the new child ordering.

Tells if this view parent can resolve the layout direction. See setLayoutDirection(int)

Tells if this view parent can resolve the text alignment. See setTextAlignment(int)

Tells if this view parent can resolve the text direction. See setTextDirection(int)

This method is called on the parent when a child's drawable state has changed.

Called when a child view now has or no longer is tracking transient state.

"Transient state" is any state that a View might hold that is not expected to be reflected in the data model that the View currently presents. This state only affects the presentation to the user within the View itself, such as the current state of animations in progress or the state of a text selection operation.

Transient state is useful for hinting to other components of the View system that a particular view is tracking something complex but encapsulated. A ListView for example may acknowledge that list item Views with transient state should be preserved within their position or stable item ID instead of treating that view as trivially replaceable by the backing adapter. This allows adapter implementations to be simpler instead of needing to track the state of item view animations in progress such that they could be restored in the event of an unexpected recycling and rebinding of attached item views.

This method is called on a parent view when a child view or a view within its subtree begins or ends tracking of internal transient state.

Called when a child of this parent is giving up focus

Have the parent populate the specified context menu if it has anything to add (and then recurse on its parent).

Find the nearest view in the specified direction that wants to take focus

Tells the parent that a new focusable view has become available. This is to handle transitions from the case where there are no focusable views to the case where the first focusable view appears.

Compute the visible part of a rectangular region defined in terms of a child view's coordinates.

Returns the clipped visible part of the rectangle r , defined in the child 's local coordinate system. r is modified by this method to contain the result, expressed in the global (root) coordinate system.

The resulting rectangle is always axis aligned. If a rotation is applied to a node in the View hierarchy, the result is the axis-aligned bounding box of the visible rectangle.

Return this view parent layout direction. See getLayoutDirection()

Returns the parent if it exists, or null.

Gets the parent of a given View for accessibility. Since some Views are not exposed to the accessibility layer the parent for accessibility is not necessarily the direct parent of the View, rather it is a predecessor.

Return this view parent text alignment. See getTextAlignment()

Return this view parent text direction. See getTextDirection()

All or part of a child is dirty and needs to be redrawn.

All or part of a child is dirty and needs to be redrawn.

The location array is an array of two int values which respectively define the left and the top position of the dirty child.

This method must return the parent of this ViewParent if the specified rectangle must be invalidated in the parent. If the specified rectangle does not require invalidation in the parent or if the parent does not exist, this method must return null.

When this method returns a non-null value, the location array must have been updated with the left and top coordinates of this ViewParent.

Tells if this view parent layout direction is resolved. See setLayoutDirection(int)

Indicates whether layout was requested on this view parent.

Tells if this view parent text alignment is resolved. See setTextAlignment(int)

Tells if this view parent text direction is resolved. See setTextDirection(int)

Notifies a view parent that the accessibility state of one of its descendants has changed and that the structure of the subtree is different.

Tell view hierarchy that the global view attributes need to be re-evaluated.

Called when a child of this parent wants focus

Called when a child of this group wants a particular rectangle to be positioned onto the screen. ViewGroup s overriding this can trust that:

• child will be a direct child of this group
• rectangle will be in the child's coordinates

ViewGroup s overriding this should uphold the contract:

• nothing will change if the rectangle is already visible
• the view port will be scrolled only just enough to make the rectangle visible

Called when a child does not want this parent and its ancestors to intercept touch events with onInterceptTouchEvent(MotionEvent) .

This parent should pass this call onto its parents. This parent must obey this request for the duration of the touch (that is, only clear the flag after this parent has received an up or a cancel.

Ask that a new dispatch of View.fitSystemWindows(Rect) be performed.

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

Called by a child to request from its parent to send an AccessibilityEvent . The child has already populated a record for itself in the event and is delegating to its parent to send the event. The parent can optionally add a record for itself.

Note: An accessibility event is fired by an individual view which populates the event with a record for its state and requests from its parent to perform the sending. The parent can optionally add a record for itself before dispatching the request to its parent. A parent can also choose not to respect the request for sending the event. The accessibility event is sent by the topmost view in the view tree.

Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor. Views that "punch" holes in the view hierarchy, such as SurfaceView can use this API to improve performance of the system. When no such a view is present in the hierarchy, this optimization in unnecessary and might slightly reduce the view hierarchy performance.

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.

Start an action mode for the specified view.

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 start the action mode.