程序包 ohos.data.rdb

接口 DataObserver

所有已知实现类:

DataObserverAsyncWrapper

public interface DataObserver

Represents a data observer.

The data 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:

2

SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

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.

方法详细资料

onChange

void onChange()

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.

从以下版本开始:

2

另请参阅:

ResultSet