In order to improve the user experience, a developer uses ScrollView to realize the scrolling display of photos in an album application, and in order to improve the user experience, the developer sets the ScrollView rebound_effect property to true, so that the photo has a rebound effect when sliding to the bottom.
If a developer wants to develop a file background download function, there needs to be a Page Ability to provide U pages, and a Service Ability to provide the background file download function. If you want to perform some operations after connecting to the Service Ability in the Page Ability, you need to implement the onAbilityConnectDone() method in the Page Ability.
HarmonyOS's Data Ability is used to provide an interface for operation data, but cannot provide file-related operations.
The data generated by a developer's use of Data Ability can be shared between different applications on the same device, but cannot be shared across devices.
In the HarmonyOS system architecture, the distributed data management module belongs to the framework layer.
An engineer uses a simulator to debug a HarmonyOS application, which can support two types of HAP: signed and unsigned HAP (Harmomy0S Ability Package).
HarmonyOS application packages are released in the form of application packs, which are composed of one or more HAPs (HarmonyOS Ability Packages) and pack.info describing each HAP attribute.
When the user is driving a car, he cannot use the mobile phone with his hands free, but he can control the mobile phone through voice assistant interaction. The abovescenarios belong to a typical class of applications of entity recognition.