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Merge pull request !12717 from shawn_he/11242-a
# FAQs
- [Ability Framework Development](faqs-ability.md)
- [Bundle Management Development](faqs-bundle.md)
- [ArkUI (eTS) Development](faqs-ui-ets.md)
- [ArkUI (JavaScript) Development](faqs-ui-js.md)
- [Bundle Management Development](faqs-bundle.md)
- [Data Management Development](faqs-data-management.md)
- [Development Board](faqs-development-board.md)
- [Device Management Development](faqs-device-management.md)
- [DFX Development](faqs-dfx.md)
- [Graphics and Image Development](faqs-graphics.md)
- [hdc_std Command Usage](faqs-ide.md)
- [IDE Usage](faqs-hdc-std.md)
- [Intl Development](faqs-international.md)
- [File Management Development](faqs-file-management.md)
- [Media Development](faqs-media.md)
- [Network and Connection Development](faqs-connectivity.md)
- [Data Management Development](faqs-data-management.md)
- [Device Management Development](faqs-device-management.md)
- [Native API Usage](faqs-native.md)
- [Usage of Third- and Fourth-Party Libraries](faqs-third-party-library.md)
- [hdc_std Command Usage](faqs-ide.md)
- [IDE Usage](faqs-hdc-std.md)
- [Development Board](faqs-development-board.md)
# DFX Development
## How do I locate the fault when the application crashes?
Applicable to: OpenHarmony SDK 3.2.5.5
1. Locate the crash-related code based on the service log.
2. View the error information in the crash file. The crash file is located at **/data/log/faultlog/faultlogger/**.
## Why cannot access controls in the UiTest test framework?
Applicable to: OpenHarmony SDK 3.2.5.5
Check whether **persist.ace.testmode.enabled** is turned on.
Run **hdc\_std shell param get persist.ace.testmode.enabled**.
If the value is **0**, run the **hdc\_std shell param set persist.ace.testmode.enabled 1** to enable the test mode.
## Why Is Private Displayed in Logs When the Format Parameter Type of hilog in C++ Code Is %d or %s?
When format parameters such as **%d** and **%s** are directly used, the standard system uses **private** to replace the actual data for printing by default to prevent data leakage. To print the actual data, replace **%d** with **%{public}d** or replace **%s** with **%{public}s**.
## What should I do if the hilog.debug log cannot be printed?
Applicable to: OpenHarmony SDK 3.2.5.5, stage model of API version 9
Run **hdc_std shell hilog -b D** to turn on the debugging switch.
## Is HiLog or console recommended for log printing? How do I set the domain if HiLog is used?
Applicable to: OpenHarmony SDK 3.2.2.5
You are advised to use the [HiLog](../reference/apis/js-apis-hilog.md) for log printing. For details about how to set the **domain** parameter, see the [Development Guide](../reference/apis/js-apis-hilog.md#hilogisloggable).
## What is the maximum length of a log record when HiLog Is used? Is it configurable?
Applicable to: OpenHarmony SDK 3.2.2.5
The maximum length of a log record is 1,024 characters, and it is not changeable.
## Can I separate multiple strings by spaces in the tag parameter of the HiLog API?
Applicable to: OpenHarmony SDK 3.2.6.5, stage model of API version 9
No. Separating multiple strings by spaces is not allowed.
## How do I print real data if HiLog does not contain data labeled by {public}?
Applicable to: OpenHarmony SDK 3.2.6.5, stage model of API version 9
Run **hdc\_std shell hilog -p off** to disable logging of data labeled by {public}.
# hdc_std Command Usage
## What are the commands commonly used for log management?
## Common Log Commands
Applicable to: OpenHarmony SDK 3.2.2.5
- Clearing logs: hdc_std shell hilog -r
Clearing logs: hdc_std shell hilog -r
- Increasing the buffer size to 20 MB: hdc_std shell hilog -G 20M
- Capturing logs: hdc_std shell hilog > log.txt
Increasing the buffer size to 20 MB: hdc_std shell hilog -G 20M
Capturing logs: hdc_std shell hilog > log.txt
## What should I do to avoid log flow control?
......@@ -27,43 +24,64 @@ Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
After performing the preceding operations, restart the DevEco Studio.
## What should I do if the HAP installed on the development board through the IDE cannot be opened?
## Is HiLog or Console recommended for log printing? How do I set the domain if HiLog is used?
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Applicable to: OpenHarmony SDK 3.2.2.5
Check whether the SDK version is consistent with the system version on the development board. You are advised to use the SDK version and system version that are released on the same day.
[HiLog](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-hilog.md) is recommended for an application to print logs. For details about domain setting, see [Development Guide](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-hilog.md#hilogisloggable).
## How do I upload files using the hdc command?
Applicable to: OpenHarmony SDK 3.2.2.5
## What is the maximum length of a log record when HiLog is used? Is it configurable?
Run the **hdc_std file send** command.
Applicable to: OpenHarmony SDK 3.2.2.5
## How do I prevent the screen of the RK3568 development board from turning off?
The maximum length of a log record is 1,024 characters, and it is not changeable.
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Run the **hdc_std shell "power-shell setmode 602"** command.
## What should I do if a HAP package cannot be opened after being installed on the development board using the IDE?
## How do I start an ability using the hdc command?
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Check whether the SDK version is consistent with the system version on the development board. You are advised to use the SDK version and system version that are released on the same day.
Run the **hdc\_std shell aa start -a AbilityName -b bundleName -m moduleName** command.
## How do I change the read and write permissions on a file directory on the development board?
## How do I upload files using an hdc command?
Applicable to: OpenHarmony SDK 3.2.5.6, stage model of API version 9
Run the **hdc\_std shell mount -o remount,rw /** command.
## What should I do if the error message "Unknown file option -r" is displayed when hdc_std file recv is run?
Applicable to: OpenHarmony SDK 3.2.5.6, stage model of API version 9
1. Use the the hdc tool in the device image or SDK of the same version.
2. Remove any Chinese characters or spaces from the directory specified for the hdc tool.
## How do I uninstall an application using the hdc command?
Applicable to: OpenHarmony SDK 3.2.2.5
Run the **hdc_std file send** command.
Run the **hdc\_std uninstall [-k] [package_name]** command.
## How do I prevent the screen of the RK3568 development board from turning off?
## How do I check whether the system is 32-bit or 64-bit?
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Applicable to: OpenHarmony SDK 3.2.5.5
Run the **hdc_std shell "power-shell setmode 602"** command.
Run the **hdc\_std shell getconf LONG_BIT** command.
If **64** is returned, the system is a 64-bit one. Otherwise, the system is a 32-bit one.
## How do I start an ability using an hdc command?
## How do I view the component tree structure?
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Applicable to: OpenHarmony SDK 3.2.5.5
1. Run the **hdc\_std shell** command to launch the CLI.
2. Run the **aa dump -a** command to find **abilityID**.
Run the **hdc_std shell aa start -a AbilityName -b bundleName -m moduleName** command.
3. Run the **aa dump -i [abilityID] -c -render** command to view the component tree.
# Intl Development
## How resources in AppScope, such as images and text, are referenced?
Applicable to: OpenHarmony SDK 3.2.5.5, stage model of API version 9
Resources are referenced in the **$r('app.type.name')** format. Where, **type** indicates the resource type, such as color, string, and media, and **name** indicates the resource name.
## How do I convert the resource type to string?
Applicable to: OpenHarmony SDK3.0, stage model of API version 9
If the resource type is set to **string**, the qualifier directory can be set as **this.context.resourceManager.getStringSync(\\$r('app.string.test').id)** and can be converted synchronously. The **\$r('app.string.test', 2)** mode is not supported. For more usage methods, see [Resource Manager](../reference/apis/js-apis-resource-manager.md#getstringsync9).
## Why should I do if the constants referenced by $ in the form_config.json file does not take effect?
Applicable to: OpenHarmony SDK 3.2.6.5, API9 Stage model
In the **form\_config.json** file, **$** cannot be used to reference constants.
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