程序包 ohos.data.rdb

类 DataObserverAsyncWrapper

java.lang.Object

ohos.data.rdb.DataObserverAsyncWrapper

所有已实现的接口:

DataObserver

public class DataObserverAsyncWrapper
extends Object
implements DataObserver

A wrapper class of DataObserver. The DataObserverAsyncWrapper instance notifies the wrapped DataObserver instance asynchronously.

The observer is used as an input parameter for the ResultSet.registerObserver(ohos.data.rdb.DataObserver) and ResultSet.unregisterObserver(ohos.data.rdb.DataObserver) methods.

从以下版本开始:

3

SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

构造器概要

构造器

构造器	说明
DataObserverAsyncWrapper(DataObserver observer, EventHandler eventHandler)	A parameterized constructor used to create a DataObserverAsyncWrapper instance.

方法概要

限定符和类型	方法	说明
void	onChange()	Called when the data in a result set changes.

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

DataObserverAsyncWrapper

public DataObserverAsyncWrapper(DataObserver observer,
                                EventHandler eventHandler)

A parameterized constructor used to create a DataObserverAsyncWrapper instance.

参数:

observer - Indicates the DataObserver instance to be wrapped.

eventHandler - Indicates the event handler used to notify the wrapped DataObserver instance in an asynchronous thread.

从以下版本开始:

3

方法详细资料

onChange

public void onChange()

从接口复制的说明: DataObserver

Called when the data in a result set changes.

You can define the logic applied after this method is called to meet your service requirements.

指定者:

onChange 在接口中 DataObserver

另请参阅:

ResultSet