When developing the list component in the JavaScript UI framework, you can use the data of the Map type to dynamically bind the data.
Developers can create user interfaces directly on AbilitySlice or on Ability.
HarmonyOS provides the Al capability of Instant Messaging (IM) intent, which can convert speech signals into text or commands, and identify the user's intent represented by the message content.
The application package names of the application projects created by JavaSaript and the applications compiled by the Java projects are HAR (HarmonyOS Ability Resources) and HAP (HarmonyOS Ability Package), respectively.
When a time-consuming operation needs to be performed in a HarmonyOS application, it is preferable to create subthreads in FA instead of creating subthreads in Service.
In HarmonyOS, by default, the UI interface is displayed and updated in the main thread
When a developer uses mobile phones and smart screens to develop applications, he can select two device types, smartphones and smart screens, in the AppGallery project.
When a developer starts a music player on a remote device, he or she may not fill in the Deviceld of the remote device.
When an engineer packages an application, DevEco Studio will package all the HAP (HarmonyOS Ability Package) modules in the project directory into the application, so if there are HAP modules in the project directory that do not need to be packaged into the application, the tool will automatically delete them and then compile and build the application.
On the basis of the supported input events, HarmonyOS's multi-dimensional input defines some input actions commonly used by users as a set of standardized events, maps the input events of different input devices to the standardized events, and can obtain a unified experience when using multiple input devices to operate different terminal devices or applications.
In the HarmonyOS system architecture, the distributed data management module belongs to the framework layer.
Lightweight data storage is suitable for data storage involving a large number of data relationships and business relationships, and has better read and write performance than relational databases and object-relational mapping databases.
An application can have one or two HAP (HarmonyOS Abi1itPackage) packages of entry type in the same device type.
When MainAbility and MainAbiitySlice are bound together, the lifecycles of the two are synchronized, including the callback method for transitioning between states.
Service is running in the background, and users want the application to keep running all the time when playing music, and the foreground Service cannot be used at this time.
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