When a developer designs a navigation application and needs the system to provide accurate positioning, which subsystem will be used?
When a developer needs to specify the exact coordinates of the x-axis and y-axis of a sub-component when laying out a component, which layout can be used to achieve this function?
A developer now needs to make a motion track recording application, which can report the user's location information in real time. Which of the following is correct?
When a developer develops a HarmomyOSapplication, if a Text component is used as the title bar of the page, and its width is set to match_parent and its height is set to 50vp, how can the text content in the Text be centered when setting its properties in the layout file?
In the declarative development paradigm, which of the following decorator decorated state variables needs to be initialized locally, and the initialized value can be overridden by the construction parameters?
If a developer needs to use asyncDispatchBarrier to set up a barrier asynchronously, in this scenario, in order to separate different task groups, the developer can choose which of the following task dispensers?
When the user clicks on a song from the music list page and jumps to the playback interface of the song, the principle is that the page route routes to the destination page according to which of the following?
The user migrates the video on the mobile phone to the smart screen for playback, and after the mobile phone saves the data, the smart screen calls back which of the following methods does the user recover the data?
When a developer migrates pictures on his mobile phone to a large screen, the interface layout automatically switches from vertical to horizontal; When the image is migrated, the image is migrated from the large screen to the mobile phone, and the interface layout is automatically switched from horizontal to vertical. Excuse me, how did this developer implement this feature?
Now a Text component is used as the title of a page, and the Text needs to be set to be invisible, but it still occupies the current layout space, which of the following is correct?
A HarmonyOS developerdevelops an application based on distributed data services, and the developer uses device A, device B, and device C to test the functionality of the application in a distributed scenario. In the test, after device A successfully adds, deletes, and modifies data, device B and device C cannot read the updated data immediately, but after a certain time window, the data of the three devices will reach the same state. In the preceding scenario, what kind of consistency does the application conform to in a distributed database?
When a developer installs HAP (HarmonyOSAbility Package), what is the reason for the "STRING LENGTH ERROR" message?
The key generated by the developer contains the public key and the private key used in asymmetric encryption, and in what format is the key stored in the key file?
How to realize distributed communication betweentwo existing Harmony OS devices?
What is the process of cross-terminal migration from an application on HarmonyOS device A to the application on device B by calling the distributed task scheduling capability to continue sbility?
