程序包 ohos.agp.components.listcomponent

类 ListStaggeredGridLayoutManager

java.lang.Object

ohos.agp.components.LayoutManager

ohos.agp.components.listcomponent.ListLayoutManager

ohos.agp.components.listcomponent.ListStaggeredGridLayoutManager

public class ListStaggeredGridLayoutManager
extends ListLayoutManager

Inherits from ListLayoutManager and implements the masonry layout of the ListComponent.

从以下版本开始:

7

字段概要

字段

限定符和类型	字段	说明
static int	GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS	Indicates the rule for processing the gap between components in the ListComponent.
static int	GAP_HANDLING_NONE	Indicates no processing on the gap.
static int	HORIZONTAL	Indicates that the components are arranged horizontally in the ListComponent.
static int	VERTICAL	Indicates that the components are arranged vertically in the ListComponent.

构造器概要

构造器

构造器	说明
ListStaggeredGridLayoutManager()	Default constructor used to create a ListStaggeredGridLayoutManager instance.

方法概要

限定符和类型	方法	说明
protected void	createNativePtr()
int	getGapProcessingStrategy()	Obtains the gap processing strategy of this ListStaggeredGridLayoutManager instance.
int	getLaneCount()	Obtains the number of lanes in the layout.
int	getLayoutOrientation()	Obtains the layout orientation.
boolean	getReverseLayoutChild()	Checks whether the components need to be laid out in the reverse direction.
void	scrollToPositionWithDelta(int position, int delta)	Scrolls the ListComponent to the specified position in the provider based on a given distance.
int[]	searchFirstFullyShowItemPositions(int[] into)	Obtains the position of the first completely visible component in each lane in the provider.
int[]	searchFirstShowItemPositions(int[] into)	Obtains the position of the first visible component in each lane in the provider.
int[]	searchLastFullyShowItemPositions(int[] into)	Obtains the position of the last completely visible component in each lane in the provider.
int[]	searchLastShowItemPositions(int[] into)	Obtains the position of the last visible component in each lane in the provider.
void	setGapProcessingStrategy(int gapProcessingStrategy)	Sets a gap processing strategy for this ListStaggeredGridLayoutManager instance.
void	setLaneCount(int laneCount)	Sets the number of lanes for the layout.
void	setLayoutOrientation(int orientation)	Sets the layout orientation.
void	setReverseLayoutChild(boolean reverseLayout)	Sets whether to lay out the components in the reverse direction.

从类继承的方法 ohos.agp.components.listcomponent.ListLayoutManager

allowScrollHorizontally, allowScrollVertically, getOrientation, isPreloadWorkerEnabled, isScrollingSmoothly, setOrientation, setPreloadWorkerEnabled

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS

public static final int GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS

Indicates the rule for processing the gap between components in the ListComponent. The rule is as follows: [before] _BC DDD [after] BCD DD_

从以下版本开始:

7

另请参阅:

常量字段值

GAP_HANDLING_NONE

public static final int GAP_HANDLING_NONE

Indicates no processing on the gap.

从以下版本开始:

7

另请参阅:

常量字段值

HORIZONTAL

public static final int HORIZONTAL

Indicates that the components are arranged horizontally in the ListComponent.

从以下版本开始:

7

另请参阅:

常量字段值

VERTICAL

public static final int VERTICAL

Indicates that the components are arranged vertically in the ListComponent.

从以下版本开始:

7

另请参阅:

常量字段值

构造器详细资料

ListStaggeredGridLayoutManager

public ListStaggeredGridLayoutManager()

Default constructor used to create a ListStaggeredGridLayoutManager instance.

从以下版本开始:

7

方法详细资料

setGapProcessingStrategy

public void setGapProcessingStrategy(int gapProcessingStrategy)

Sets a gap processing strategy for this ListStaggeredGridLayoutManager instance.

参数:

gapStrategy - Indicates the gap processing strategy to set, which can be GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS or GAP_HANDLING_NONE.

从以下版本开始:

7

getGapProcessingStrategy

public int getGapProcessingStrategy()

Obtains the gap processing strategy of this ListStaggeredGridLayoutManager instance.

返回:

Returns the gap processing strategy.

从以下版本开始:

7

searchLastShowItemPositions

public int[] searchLastShowItemPositions(int[] into)

Obtains the position of the last visible component in each lane in the provider.

参数:

into - Indicates the array for storing the positions. If this parameter is set to null, the ListLayoutManager will create an array.

返回:

Returns the positions of these components in all lanes in the provider.

从以下版本开始:

7

searchLastFullyShowItemPositions

public int[] searchLastFullyShowItemPositions(int[] into)

Obtains the position of the last completely visible component in each lane in the provider.

参数:

into - Indicates the array for storing the positions. If this parameter is set to null, the ListLayoutManager will create an array.

返回:

Returns the positions of these components in all lanes in the provider.

从以下版本开始:

7

searchFirstShowItemPositions

public int[] searchFirstShowItemPositions(int[] into)

Obtains the position of the first visible component in each lane in the provider.

参数:

into - Indicates the array for storing the positions. If this parameter is set to null, the ListLayoutManager will create an array.

返回:

Returns the positions of these components in all lanes in the provider.

从以下版本开始:

7

searchFirstFullyShowItemPositions

public int[] searchFirstFullyShowItemPositions(int[] into)

Obtains the position of the first completely visible component in each lane in the provider.

参数:

into - Indicates the array for storing the positions. If this parameter is set to null, the ListLayoutManager will create an array.

返回:

Returns the positions of these components in all lanes in the provider.

从以下版本开始:

7

setLaneCount

public void setLaneCount(int laneCount)

Sets the number of lanes for the layout.

参数:

laneCount - Indicates the number of lanes to set.

从以下版本开始:

7

getLaneCount

public int getLaneCount()

Obtains the number of lanes in the layout.

返回:

Returns the number of lanes.

从以下版本开始:

7

setReverseLayoutChild

public void setReverseLayoutChild(boolean reverseLayout)

Sets whether to lay out the components in the reverse direction.

参数:

reverseLayout - Specifies whether to lay out the components in the reverse direction. The value true means to lay out the components in the reverse direction, and false means the opposite.

从以下版本开始:

7

getReverseLayoutChild

public boolean getReverseLayoutChild()

Checks whether the components need to be laid out in the reverse direction.

返回:

Returns true if the components need to be laid out in the reverse direction; returns false otherwise.

从以下版本开始:

7

setLayoutOrientation

public void setLayoutOrientation(int orientation)

Sets the layout orientation.

参数:

orientation - Indicates the layout orientation to set, which can be HORIZONTAL or VERTICAL.

从以下版本开始:

7

getLayoutOrientation

public int getLayoutOrientation()

Obtains the layout orientation.

返回:

Returns the layout orientation, which can be HORIZONTAL or VERTICAL.

从以下版本开始:

7

scrollToPositionWithDelta

public void scrollToPositionWithDelta(int position,
                                      int delta)

Scrolls the ListComponent to the specified position in the provider based on a given distance.

参数:

position - Indicates the position to scroll to.

delta - Indicates the distance (in pixels) between the component's start edge and the start edge of the ListComponent.

从以下版本开始:

7

createNativePtr

protected void createNativePtr()