How to realize distributed communication betweentwo existing Harmony OS devices?
In the JavaScript UI framework, which layer is used to provide animation parsing, DOM (Document Object Model) tree construction, layout calculation, rendering command construction and drawing, event management, etc.?
A developer needs to cancel a task, but part of the code segment he wrote was deleted by mistake. The remaining codes are as follows, with the missing codes indicated by the dash:
TaskDispatcher dispatcher =
getUlTaskDispatcher();
Revocable revocable =
________________________(new Runnable(){
@Overide Public void run(){
HiLog.info(L . ABEL_ _LOG,"delay dispatch");
}
},10);
Boolean revoked = revocable.revoke();
HiL og.info(L _ABEL_ LOG),"%{public}b" ,revoked);
Which of the following might be missing pieces in the above code?
Which of the following is the callback behavior of the Page Ability lifecycle that can destroy the page?
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 should a developer choose the Debug Type if he needs to debug JAVA code separately in a JS+JAVA hybrid project?
If a developer wants to develop a file background download function, there needs to be a Page Ability to provide UI pages, and a Service Ability to provide the background file download function. Which of the following can invoke Service Ability in Page Ability?
Which of the following does not belong to the system service layer in the HarmonyOS system architecture?
What lifecycle processes will be triggered when a developer creates a Page instance and lets the instance be displayed in the foreground?
In order to cope with complex application business logic, a developer needs to create multiple threads to perform multiple tasks. In this case, the code is complex and difficult to maintain, and the interaction between tasks and threads becomes more complex. To solve this problem, which of the following interfaces can the developer use to distribute different tasks?
If there are 3 Ability sharing a Service instance, how can I exit the Service instance?
fter a developer sets :ohos:layout_alignment="horizontal_center" in the Text component, he writes: text.setMarginRight (600) in the code, where is the Text displayed in the parent layout?
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?
If a developer wants to develop a page with a tab function, the developer can use the TabList component provided by HarmonyOS. If you want to set the selected tab to be marked by underlining at the bottom, which of the following codes is correct?
Which of the following fields is not within the scope of permission?
