added in version 22.1.0
belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1

Summary: Ctors | Methods | Inherited Methods | [Expand All]

GridLayoutManager.SpanSizeLookup

public static abstract class GridLayoutManager.SpanSizeLookup
extends Object

java.lang.Object
↳	android.support.v7.widget.GridLayoutManager.SpanSizeLookup

Known Direct Subclasses

A helper class to provide the number of spans each item occupies.

Default implementation sets each item to occupy exactly 1 span.

See also:

Summary

Public constructors
`GridLayoutManager.SpanSizeLookup()`

Public methods
`int`	`getSpanGroupIndex(int adapterPosition, int spanCount)` Returns the index of the group this position belongs.
`int`	`getSpanIndex(int position, int spanCount)` Returns the final span index of the provided position.
`abstract int`	`getSpanSize(int position)` Returns the number of span occupied by the item at `position`.
`void`	`invalidateSpanIndexCache()` Clears the span index cache.
`boolean`	`isSpanIndexCacheEnabled()` Returns whether results of `getSpanIndex(int, int)` method are cached or not.
`void`	`setSpanIndexCacheEnabled(boolean cacheSpanIndices)` Sets whether the results of `getSpanIndex(int, int)` method should be cached or not.

From class


  
    java.lang.Object

GridLayoutManager.SpanSizeLookup ()

int getSpanGroupIndex (int adapterPosition, 
                int spanCount)

Returns the index of the group this position belongs.

For example, if grid has 3 columns and each item occupies 1 span, span group index for item 1 will be 0, item 5 will be 1.

Parameters
`adapterPosition`	`int`: The position in adapter
`spanCount`	`int`: The total number of spans in the grid

Returns
`int`	The index of the span group including the item at the given adapter position

int getSpanIndex (int position, 
                int spanCount)

Returns the final span index of the provided position.

If you have a faster way to calculate span index for your items, you should override this method. Otherwise, you should enable span index cache (