程序包 ohos.agp.components.listcomponent

类 LaneInfoHelper

java.lang.Object

ohos.agp.components.listcomponent.LaneInfoHelper

public abstract class LaneInfoHelper
extends Object

A helper abstract class that manages lane information in the ListGridLayoutManager.

从以下版本开始:

7

嵌套类概要

嵌套类

限定符和类型	类	说明
protected static class	LaneInfoHelper.LaneInfoHelperCleaner	Implements the release of the local LaneInfoHelper object.

字段概要

字段

限定符和类型	字段	说明
protected long	mNativePtr	Obtains the native object.

构造器概要

构造器

构造器	说明
LaneInfoHelper()	A constructor used to create a LaneInfoHelper object.

方法概要

限定符和类型	方法	说明
abstract int	getLaneCountAt(int position)	Obtains the number of lanes occupied by the component at the specified position.
int	getLaneIndex(int position, int laneCount)	Obtains the lane index of the component at the specified position.
int	getLaneSetIndex(int providerPosition, int laneCount)	Obtains the lane set index of the component at the specified position.
long	getNativePtr()	Obtains the native object.
boolean	isLaneIndexCacheAllowed()	Checks whether the lane indices can be cached.
boolean	isLaneSetIndexCacheAllowed()	Checks whether the lane set indices can be cached.
void	setLaneGroupIndexCacheAllowed(boolean cacheLaneGroupIndices)	Sets whether the lane set indices can be cached.
void	setLaneIndexCacheAllowed(boolean cacheLaneIndices)	Sets whether the lane indices can be cached.

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

mNativePtr

protected long mNativePtr

Obtains the native object.

构造器详细资料

LaneInfoHelper

public LaneInfoHelper()

A constructor used to create a LaneInfoHelper object.

从以下版本开始:

7

方法详细资料

getLaneCountAt

public abstract int getLaneCountAt(int position)

Obtains the number of lanes occupied by the component at the specified position.

参数:

position - Indicates the position of the component in the provider.

返回:

Returns the number of lanes.

从以下版本开始:

7

getLaneIndex

public int getLaneIndex(int position,
                        int laneCount)

Obtains the lane index of the component at the specified position.

参数:

position - Indicates the position of the component in the provider.

laneCount - Indicates the total number of lanes in the grid.

返回:

Returns the lane index.

从以下版本开始:

7

getLaneSetIndex

public int getLaneSetIndex(int providerPosition,
                           int laneCount)

Obtains the lane set index of the component at the specified position.

参数:

providerPosition - Indicates the position of the component in the provider.

laneCount - Indicates the total number of lanes in the grid.

返回:

Returns the lane set index.

从以下版本开始:

7

setLaneIndexCacheAllowed

public void setLaneIndexCacheAllowed(boolean cacheLaneIndices)

Sets whether the lane indices can be cached.

参数:

cacheLaneIndices - Specifies whether the lane indices can be cached. The value true means that the lane indices can be cached, and false means the opposite.

从以下版本开始:

7

isLaneIndexCacheAllowed

public boolean isLaneIndexCacheAllowed()

Checks whether the lane indices can be cached.

返回:

Returns true if the lane indices can be cached; returns false otherwise.

从以下版本开始:

7

setLaneGroupIndexCacheAllowed

public void setLaneGroupIndexCacheAllowed(boolean cacheLaneGroupIndices)

Sets whether the lane set indices can be cached.

参数:

cacheLaneGroupIndices - Specifies whether the lane set indices can be cached. The value true means that the lane set indices can be cached, and false means the opposite.

从以下版本开始:

7

isLaneSetIndexCacheAllowed

public boolean isLaneSetIndexCacheAllowed()

Checks whether the lane set indices can be cached.

返回:

Returns true if the lane set indices can be cached; returns false otherwise.

从以下版本开始:

7

getNativePtr

public long getNativePtr()

Obtains the native object.

返回:

Returns the native object.