belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1
LinearLayoutManager
public
class
LinearLayoutManager
extends RecyclerView.LayoutManager
implements
ItemTouchHelper.ViewDropHandler,
RecyclerView.SmoothScroller.ScrollVectorProvider
java.lang.Object | ||
↳ | android.support.v7.widget.RecyclerView.LayoutManager | |
↳ | android.support.v7.widget.LinearLayoutManager |
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A RecyclerView.LayoutManager
implementation which provides
similar functionality to ListView
.
Summary
Nested classes | |
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class |
LinearLayoutManager.LayoutChunkResult
|
XML attributes | |
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RecyclerView_android_orientation |
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RecyclerView_reverseLayout |
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RecyclerView_stackFromEnd |
Inherited XML attributes | |
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android.support.v7.widget.RecyclerView.LayoutManager
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Constants | |
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int |
HORIZONTAL
|
int |
INVALID_OFFSET
|
int |
VERTICAL
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Public constructors | |
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LinearLayoutManager(Context context)
Creates a vertical LinearLayoutManager |
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LinearLayoutManager(Context context, int orientation, boolean reverseLayout)
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LinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
Constructor used when layout manager is set in XML by RecyclerView attribute "layoutManager". |
Public methods | |
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void
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assertNotInLayoutOrScroll(String message)
Checks if RecyclerView is in the middle of a layout or scroll and throws an
|
boolean
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canScrollHorizontally()
Query if horizontal scrolling is currently supported. |
boolean
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canScrollVertically()
Query if vertical scrolling is currently supported. |
void
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collectAdjacentPrefetchPositions(int dx, int dy, RecyclerView.State state, RecyclerView.LayoutManager.LayoutPrefetchRegistry layoutPrefetchRegistry)
Gather all positions from the LayoutManager to be prefetched, given specified momentum. |
void
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collectInitialPrefetchPositions(int adapterItemCount, RecyclerView.LayoutManager.LayoutPrefetchRegistry layoutPrefetchRegistry)
Gather all positions from the LayoutManager to be prefetched in preperation for its RecyclerView to come on screen, due to the movement of another, containing RecyclerView. |
int
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computeHorizontalScrollExtent(RecyclerView.State state)
Override this method if you want to support scroll bars. |
int
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computeHorizontalScrollOffset(RecyclerView.State state)
Override this method if you want to support scroll bars. |
int
|
computeHorizontalScrollRange(RecyclerView.State state)
Override this method if you want to support scroll bars. |
PointF
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computeScrollVectorForPosition(int targetPosition)
Should calculate the vector that points to the direction where the target position can be found. |
int
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computeVerticalScrollExtent(RecyclerView.State state)
Override this method if you want to support scroll bars. |
int
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computeVerticalScrollOffset(RecyclerView.State state)
Override this method if you want to support scroll bars. |
int
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computeVerticalScrollRange(RecyclerView.State state)
Override this method if you want to support scroll bars. |
int
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findFirstCompletelyVisibleItemPosition()
Returns the adapter position of the first fully visible view. |
int
|
findFirstVisibleItemPosition()
Returns the adapter position of the first visible view. |
int
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findLastCompletelyVisibleItemPosition()
Returns the adapter position of the last fully visible view. |
int
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findLastVisibleItemPosition()
Returns the adapter position of the last visible view. |
View
|
findViewByPosition(int position)
Finds the view which represents the given adapter position. |
RecyclerView.LayoutParams
|
generateDefaultLayoutParams()
Create a default |
int
|
getInitialPrefetchItemCount()
Gets the number of items to prefetch in
|
int
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getOrientation()
Returns the current orientation of the layout. |
boolean
|
getRecycleChildrenOnDetach()
Returns whether LayoutManager will recycle its children when it is detached from RecyclerView. |
boolean
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getReverseLayout()
Returns if views are laid out from the opposite direction of the layout. |
boolean
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getStackFromEnd()
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boolean
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isAutoMeasureEnabled()
Returns whether the measuring pass of layout should use the AutoMeasure mechanism of
|
boolean
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isSmoothScrollbarEnabled()
Returns the current state of the smooth scrollbar feature. |
void
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onDetachedFromWindow(RecyclerView view, RecyclerView.Recycler recycler)
Called when this LayoutManager is detached from its parent RecyclerView or when its parent RecyclerView is detached from its window. |
View
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onFocusSearchFailed(View focused, int focusDirection, RecyclerView.Recycler recycler, RecyclerView.State state)
Called when searching for a focusable view in the given direction has failed for the current content of the RecyclerView. |
void
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onInitializeAccessibilityEvent(AccessibilityEvent event)
|
void
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onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state)
Lay out all relevant child views from the given adapter. |
void
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onLayoutCompleted(RecyclerView.State state)
Called after a full layout calculation is finished. |
void
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onRestoreInstanceState(Parcelable state)
|
Parcelable
|
onSaveInstanceState()
Called when the LayoutManager should save its state. |
int
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scrollHorizontallyBy(int dx, RecyclerView.Recycler recycler, RecyclerView.State state)
Scroll horizontally by dx pixels in screen coordinates and return the distance traveled. |
void
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scrollToPosition(int position)
Scroll the RecyclerView to make the position visible. |
void
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scrollToPositionWithOffset(int position, int offset)
Scroll to the specified adapter position with the given offset from resolved layout start. |
int
|
scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state)
Scroll vertically by dy pixels in screen coordinates and return the distance traveled. |
void
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setInitialPrefetchItemCount(int itemCount)
Sets the number of items to prefetch in
|
void
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setOrientation(int orientation)
Sets the orientation of the layout. |
void
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setRecycleChildrenOnDetach(boolean recycleChildrenOnDetach)
Set whether LayoutManager will recycle its children when it is detached from RecyclerView. |
void
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setReverseLayout(boolean reverseLayout)
Used to reverse item traversal and layout order. |
void
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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
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setStackFromEnd(boolean stackFromEnd)
Compatibility support for |
void
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smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position)
Smooth scroll to the specified adapter position. |
boolean
|
supportsPredictiveItemAnimations()
Returns whether this LayoutManager supports "predictive item animations". |
Protected methods | |
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int
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getExtraLayoutSpace(RecyclerView.State state)
Returns the amount of extra space that should be laid out by LayoutManager. |
boolean
|
isLayoutRTL()
|
Inherited methods | |
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android.support.v7.widget.RecyclerView.LayoutManager
|