belongs to Maven artifact androidx.recyclerview:recyclerview:1.0.0-alpha1

RecyclerView.ItemDecoration

public static abstract class RecyclerView.ItemDecoration
extends Object

java.lang.Object
   ↳ androidx.recyclerview.widget.RecyclerView.ItemDecoration


An ItemDecoration allows the application to add a special drawing and layout offset to specific item views from the adapter's data set. This can be useful for drawing dividers between items, highlights, visual grouping boundaries and more.

All ItemDecorations are drawn in the order they were added, before the item views (in onDraw() and after the items (in onDrawOver(Canvas, RecyclerView, RecyclerView.State).

Summary

Public constructors

RecyclerView.ItemDecoration()

Public methods

void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state)

Retrieve any offsets for the given item.

void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent)

This method is deprecated. Use getItemOffsets(Rect, View, RecyclerView, State)

void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state)

Draw any appropriate decorations into the Canvas supplied to the RecyclerView.

void onDraw(Canvas c, RecyclerView parent)

This method is deprecated. Override onDraw(Canvas, RecyclerView, RecyclerView.State)

void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state)

Draw any appropriate decorations into the Canvas supplied to the RecyclerView.

void onDrawOver(Canvas c, RecyclerView parent)

This method is deprecated. Override onDrawOver(Canvas, RecyclerView, RecyclerView.State)

Inherited methods

Public constructors

RecyclerView.ItemDecoration

RecyclerView.ItemDecoration ()

Public methods

getItemOffsets

void getItemOffsets (Rect outRect, 
                View view, 
                RecyclerView parent, 
                RecyclerView.State state)

Retrieve any offsets for the given item. Each field of outRect specifies the number of pixels that the item view should be inset by, similar to padding or margin. The default implementation sets the bounds of outRect to 0 and returns.

If this ItemDecoration does not affect the positioning of item views, it should set all four fields of outRect (left, top, right, bottom) to zero before returning.

If you need to access Adapter for additional data, you can call RecyclerView.getChildAdapterPosition(View) to get the adapter position of the View.

Parameters
outRect Rect: Rect to receive the output.

view View: The child view to decorate

parent RecyclerView: RecyclerView this ItemDecoration is decorating

state RecyclerView.State: The current state of RecyclerView.

getItemOffsets

void getItemOffsets (Rect outRect, 
                int itemPosition, 
                RecyclerView parent)

This method is deprecated.
Use getItemOffsets(Rect, View, RecyclerView, State)

Parameters
outRect Rect

itemPosition int

parent RecyclerView

onDraw

void onDraw (Canvas c, 
                RecyclerView parent, 
                RecyclerView.State state)

Draw any appropriate decorations into the Canvas supplied to the RecyclerView. Any content drawn by this method will be drawn before the item views are drawn, and will thus appear underneath the views.

Parameters
c Canvas: Canvas to draw into

parent RecyclerView: RecyclerView this ItemDecoration is drawing into

state RecyclerView.State: The current state of RecyclerView

onDraw

void onDraw (Canvas c, 
                RecyclerView parent)

This method is deprecated.
Override onDraw(Canvas, RecyclerView, RecyclerView.State)

Parameters
c Canvas

parent RecyclerView

onDrawOver

void onDrawOver (Canvas c, 
                RecyclerView parent, 
                RecyclerView.State state)

Draw any appropriate decorations into the Canvas supplied to the RecyclerView. Any content drawn by this method will be drawn after the item views are drawn and will thus appear over the views.

Parameters
c Canvas: Canvas to draw into

parent RecyclerView: RecyclerView this ItemDecoration is drawing into

state RecyclerView.State: The current state of RecyclerView.

onDrawOver

void onDrawOver (Canvas c, 
                RecyclerView parent)

This method is deprecated.
Override onDrawOver(Canvas, RecyclerView, RecyclerView.State)

Parameters
c Canvas

parent RecyclerView