DefaultSpanSizeLookup

Kotlin |Java

class DefaultSpanSizeLookup : GridLayoutManager.SpanSizeLookup

kotlin.Any
↳	androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup
	↳	androidx.recyclerview.widget.GridLayoutManager.DefaultSpanSizeLookup

Default implementation for SpanSizeLookup. Each item occupies 1 span.

Summary

Public constructors
`<init>()` Default implementation for `SpanSizeLookup`.

Public methods
Int	`getSpanIndex(position: Int, spanCount: Int)`
Int	`getSpanSize(position: Int)`

Inherited functions

From class SpanSizeLookup

`Int`	`getSpanGroupIndex(adapterPosition: Int, spanCount: Int)` 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.
`Unit`	`invalidateSpanGroupIndexCache()` Clears the span group index cache. GridLayoutManager automatically calls this method when adapter changes occur.
`Unit`	`invalidateSpanIndexCache()` Clears the span index cache. GridLayoutManager automatically calls this method when adapter changes occur.
`Boolean`	`isSpanGroupIndexCacheEnabled()` Returns whether results of `getSpanGroupIndex(int, int)` method are cached or not.
`Boolean`	`isSpanIndexCacheEnabled()` Returns whether results of `getSpanIndex(int, int)` method are cached or not.
`Unit`	`setSpanGroupIndexCacheEnabled(cacheSpanGroupIndices: Boolean)` Sets whether the results of `getSpanGroupIndex(int, int)` method should be cached or not. By default these values are not cached. If you are not overriding `getSpanGroupIndex(int, int)` with something highly performant, and you are using spans to calculate scrollbar offset and range, you should set this to true for better performance.
`Unit`	`setSpanIndexCacheEnabled(cacheSpanIndices: Boolean)` Sets whether the results of `getSpanIndex(int, int)` method should be cached or not. By default these values are not cached. If you are not overriding `getSpanIndex(int, int)` with something highly performant, you should set this to true for better performance.

Public constructors

<init>

DefaultSpanSizeLookup()

Default implementation for SpanSizeLookup. Each item occupies 1 span.

Public methods

getSpanIndex

fun getSpanIndex(
    position: Int, 
    spanCount: Int
): Int

getSpanSize

fun getSpanSize(position: Int): Int