To be called only during {@link #onLayoutChildren(Recycler, State)} to add a view to the layout that is known to be going away, either because it has

Requests an an item to be prefetched, based on position, with a specified distance, indicating priority. @param layoutPosition Position of the item t

Should calculate the vector that points to the direction where the target position can be found. <p> This method is used by the {@link LinearSmoothScr

Method to be called by subclasses when an animation is finished. <p> For each call RecyclerView makes to {@link #animateAppearance(ViewHolder, ItemHol

The second layout step where we do the actual layout of the views for the final state. This step might be run multiple times if necessary (e.g. measur

Method called when all item animations should be ended immediately. This could happen when other events, like scrolling, occur, so that animating view

Returns the first view starting from fromIndex to toIndex in views whose bounds lie within its parent bounds based on the provided preferredBoundFlags

Always call {@link #releaseWrapperAndLocalPosition(WrapperAndLocalPosition)} when you are done with it

Retrieves the previously set adapter or null if no adapter is set. @return The previously set adapter @see #setAdapter(Adapter)

Returns a unique key to be used while handling change animations. It might be child's position or stable id depending on the adapter type.

Convenience method to find the child closes to end. Caller should check it has enough children. @return The child closes to end of the layout from us

Convenience method to find the child closes to start. Caller should check it has enough children. @return The child closes to start of the layout fro

Returns the bottom edge of the given child view within its parent, offset by any applied {@link ItemDecoration ItemDecorations}. @param child Child t

Returns the left edge of the given child view within its parent, offset by any applied {@link ItemDecoration ItemDecorations}. @param child Child to

Returns the right edge of the given child view within its parent, offset by any applied {@link ItemDecoration ItemDecorations}. @param child Child to

Returns the top edge of the given child view within its parent, offset by any applied {@link ItemDecoration ItemDecorations}. @param child Child to q

Returns the end position of the layout without taking padding into account. @return The end boundary for this layout without considering padding.

Returns when this Adapter wants to restore the state. @return The current {@link StateRestorationPolicy} for this Adapter. Defaults to {@link StateRe

Calculates the bounding box of the View while taking into account its matrix changes (translation, scale etc) with respect to the RecyclerView. <p> If

Checks whether it should invalidate span assignments in response to an adapter change.

Returns true if the RecyclerView this LayoutManager is bound to has or contains focus. @return true if the RecyclerView has or contains focus @see Vi

@return true if there are more items in the data adapter

Returns the current state of the smooth scrollbar feature. It is enabled by default. @return True if smooth scrollbar is enabled, false otherwise. @s

Lay out the given child view within the RecyclerView using coordinates that include any current {@link ItemDecoration ItemDecorations} and margins. <

Used for debugging. Logs the internal representation of children to default logger.

Gets the view for the next element that we should render. Also updates current item index to the next item, based on {@link #mItemDirection} @return

* Call when the effect absorbs an impact at the given velocity. * Used when a fling reaches the scroll boundary. * * @param velocity Ve

The default implementation for {@link ItemTouchHelper.Callback#onChildDraw(Canvas, RecyclerView, RecyclerView.ViewHolder, float, float, int, boolean)}

Called when the scroll state of this RecyclerView changes. Subclasses should use this method to respond to state changes instead of an explicit listen

Recycles children between given indices. @param startIndex inclusive @param endIndex exclusive

Calculates the view layout order. (e.g. from end to start or start to end) RTL layout support is applied automatically. So if layout is RTL and {@link

Scroll to the specified adapter position with the given offset from resolved layout start. Resolved layout start depends on {@link #getReverseLayout()

RecyclerView internally does its own View measurement caching which should help with WRAP_CONTENT. <p> Use this method if the View is not yet measured

Animate a scroll by the given amount of pixels along either axis. @param dx Pixels to scroll horizontally @param dy Pixels to scroll vertically

Stop any current scroll in progress, such as one started by {@link #smoothScrollBy(int, int)}, {@link #fling(int, int)} or a touch-initiated fling.

Updates the action with given parameters. @param dx Pixels to scroll horizontally @param dy Pixels to scroll vertically @param du

Adds the item information to the post layout list @param holder The ViewHolder whose information is being saved @param info The information to save

Prepares the ViewHolder to be removed/recycled, and inserts it into the RecycledViewPool. Pass false to dispatchRecycled for views that have not been

Called when an item is moved in the RecyclerView. Implementors can choose whether and how to animate that change, but must always call {@link #dispatc

Called by the DiffUtil to decide whether two object represent the same Item. <p> For example, if your items have unique ids, this method should check

assigns anchor coordinate from the RecyclerView's padding depending on current layoutFromEnd value

Calculates the item decor insets applied to the given child and updates the provided Rect instance with the inset values. <ul> <li>The Rect's left

<p>Calculates the time for deceleration so that transition from LinearInterpolator to DecelerateInterpolator looks smooth.</p> @param dx Distance to

Checks for gaps in the UI that may be caused by adapter changes. <p> When a full span item is laid out in reverse direction, it sets a flag which we c

* Compute the current velocity based on the points that have been * collected. Only call this when you actually want to retrieve velocity *

Skips pre-processing and applies all updates in one pass.

RecyclerView provides artificial position range (item count) in pre-layout state and automatically maps these positions to {@link Adapter} positions w

Creates a horizontal OrientationHelper for the given LayoutManager. @param layoutManager The LayoutManager to attach to. @return A new OrientationHel

Creates an OrientationHelper for the given LayoutManager and orientation. @param layoutManager LayoutManager to attach to @param orientation Desire

Creates a vertical OrientationHelper for the given LayoutManager. @param layoutManager The LayoutManager to attach to. @return A new OrientationHelpe

An implementation of {@link View#onMeasure(int, int)} to fall back to in various scenarios where this RecyclerView is otherwise lacking better informa

Method to be called by subclasses when a change animation is done. @param item The item which has been changed (this method must be called for

Method to be called by subclasses when a remove animation is done. @param item The item which has been removed @see RecyclerView.ItemAnimator#animate

Method called when an animation on a view should be ended immediately. This could happen when other events, like scrolling, occur, so that animating v