HarmonyOS provides access to external storage devices, such as USB flash drives, SD cards, etc.
A developer needs to use the JavaScript UI framework to display the bar chart of the current month's product sales, and can use the chart component to achieve this function.
The following code snippet is used to start the Service of the remote device, if it is replaced with the Service.withDeviceld("deviceld") that starts the local device, it can be deleted.
Intent intent =new Intent();
Operation operation =new Intent.OperationBuilderO
.withDeviceld("deviceld")
.withBundleName
("com.domainname.hiworld.himusic")
.withAbilityName("com.domainname.hiworld.himusic.ServiceAbility")
.withFlags(Intent.FLAG_ABILITYSLICE_MULTI_DEVICE)
.bui1d();
intent.setOperation(operation);
startAbility(intent);
Huawei's latest mobile phones、HarmonyOS system is pre-installed in the smart screen.Among them, the mobile phone does not belong to the HarmonyOS large system device.The smart screen belongs to the large system device。
JavaScript FA (Feature Ability) lifecycle events are divided into application lifecycle and page lifecycle.
There is a button on the main interface of a HarmonyOS application, and the display text on the button is "Start Download", after clicking this button, a sub-thread is created to perform time-consuming download operations. After the download is over, you can change the button in the subthread to "Download End".
Now a Text component is used as the title of a page, and Text needs to be set to be invisible, but it still occupies the current layout space, which of the following is correct?
When a developer needs to create a Service Ability when developing a background service, which of the following processes is NOT the step to create the Ability?
Which of the following subsystems does a developer use when using the facial recognition feature of HarmonyOS?
When the system destroys a page, which of the following callback methods will be triggered?
A developer found that the app could not usethe network management function of Harmony OS without requesting permissions. In order to use the network management feature, the developer requested the following permissions for their app, which of them is not required for the network management feature?
When a developer installs HAP (HarmonyOSAbility Package), what is the reason for the "STRING LENGTH ERROR" message?
If a developer needs to solve problems such as insufficient image resolution and image compression noise, which of the following AI capabilities can be used by HarmonyOS?
How do I define the permissionscorrectly when a developer needs to customize the permissions for the Harmony OS third-party application?
Which of the following belongs to the application layer in the HarmonyOS system architecture?
TESTED 04 Apr 2025
