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.
When developing the list component in the JavaScript UI framework, you can use the data of the Map type to dynamically bind the data.
The network management module of HarmonyOS can realize the communication between different processes of the machine, and the communication supports streaming socket technology.
Suppose that multiple AbilitySlice are associated in MainAbility, and multiple AbilitySlice are switched in the same page, the lifecycle of MainAbility and all AbilitySlice is synchronized.
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