harmony 鸿蒙DataAbility Overview
DataAbility Overview
A DataAbility is an ability that uses the Data template. It provides unified data access for external systems, but not a UI for user interaction. A DataAbility can be started by a PageAbility, a ServiceAbility, or other applications. It remains to run in the background even after the user switches to another application.
A DataAbility helps applications manage access to data stored by themselves and other applications, and provides methods for sharing data with other applications, either on the same device or across devices.
Data can be stored in a database or files on disks. The DataAbility provide methods for inserting, deleting, updating, and querying data, and opening files. You should implement these methods.
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