程序包 ohos.agp.components.listcomponent

类 ProviderSubscriber

java.lang.Object

ohos.agp.components.listcomponent.ProviderSubscriber

public abstract class ProviderSubscriber
extends Object

An abstract class that implements the observer of the provider. You can extend this class and register the observer with the provider to observe data changes in the provider.

从以下版本开始:

7

构造器概要

构造器

构造器	说明
ProviderSubscriber()

方法概要

限定符和类型	方法	说明
void	onRangeInserted(int positionStart, int itemCount)	Called when a given number of components have been inserted to the specified position in the provider.
void	onRangeMoved(int fromPosition, int toPosition, int itemCount)	Called when a component has been moved from one position to another in the provider.
void	onRangeRemoved(int positionStart, int itemCount)	Called when a given number of components have been removed from the specified position in the provider.
void	onRangeUpdated(int positionStart, int itemCount)	Called when a given number of components starting from the specified position have been updated.
void	onRangeUpdated(int positionStart, int itemCount, Object crab)	Called when a given number of components starting from the specified position have been updated, with a crab object.
void	onUpdated()	Called when all the components in the provider have been updated.

从类继承的方法 java.lang.Object

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

构造器详细资料

ProviderSubscriber

public ProviderSubscriber()

方法详细资料

onUpdated

public void onUpdated()

Called when all the components in the provider have been updated.

从以下版本开始:

7

onRangeUpdated

public void onRangeUpdated(int positionStart,
                           int itemCount)

Called when a given number of components starting from the specified position have been updated.

参数:

positionStart - Indicates the position of the first component that has been updated.

itemCount - Indicates the number of components that have been updated.

从以下版本开始:

7

onRangeUpdated

public void onRangeUpdated(int positionStart,
                           int itemCount,
                           Object crab)

Called when a given number of components starting from the specified position have been updated, with a crab object.

参数:

positionStart - Indicates the position of the first component that has been updated.

itemCount - Indicates the number of components that have been updated.

crab - Indicates the object for storing the crab data.

从以下版本开始:

7

onRangeInserted

public void onRangeInserted(int positionStart,
                            int itemCount)

Called when a given number of components have been inserted to the specified position in the provider.

参数:

positionStart - Indicates the position of the first component that has been inserted.

itemCount - Indicates the number of components that have been inserted.

从以下版本开始:

7

onRangeRemoved

public void onRangeRemoved(int positionStart,
                           int itemCount)

Called when a given number of components have been removed from the specified position in the provider.

参数:

positionStart - Indicates the position of the first component that has been removed.

itemCount - Indicates the number of components that have been removed.

从以下版本开始:

7

onRangeMoved

public void onRangeMoved(int fromPosition,
                         int toPosition,
                         int itemCount)

Called when a component has been moved from one position to another in the provider.

参数:

fromPosition - Indicates the previous position of the component.

toPosition - Indicates the new position of the component.

itemCount - Indicates the number of components moved. The default value is 1.

从以下版本开始:

7