| hasRight(deviceName: string): boolean | Checks whether the user, for example, the application or system, has the device access permissions. The value **true** is returned if the user has the device access permissions; the value **false** is returned otherwise. |
| requestRight(deviceName: string): Promise\<boolean> | Requests the temporary permission for a given application to access the USB device. |
| connectDevice(device: USBDevice): Readonly\<USBDevicePipe> | Connects to the USB device based on the device information returned by **getDevices()**. |
| connectDevice(device: USBDevice): Readonly\<USBDevicePipe> | Connects to the USB device based on the device information returned by `getDevices()`. |
| getDevices(): Array<Readonly\<USBDevice>> | Obtains the USB device list. |
| setConfiguration(pipe: USBDevicePipe, config: USBConfig): number | Sets the USB device configuration. |
| setInterface(pipe: USBDevicePipe, iface: USBInterface): number | Sets a USB interface. |
| claimInterface(pipe: USBDevicePipe, iface: USBInterface, force?: boolean): number | Claims a USB interface |
| claimInterface(pipe: USBDevicePipe, iface: USBInterface, force?: boolean): number | Claims a USB interface. |
This module provides basic I18N capabilities, such as time and date formatting, number formatting, and string sorting, through the standard I18N interfaces defined in ECMA 402.
The [I18N](i18n-guidelines.md) module provides enhanced I18N capabilities through supplementary interfaces that are not defined in ECMA 402. It works with the Intl module to provide a complete suite of I18N capabilities.
> **NOTE**<br>
> **NOTE**
>
> In the code snippets in this document, **intl** refers to the name of the imported module.
## Setting Locale Information
...
...
@@ -24,7 +25,8 @@ Use [Locale](../reference/apis/js-apis-intl.md) APIs to maximize or minimize loc
### How to Develop
1. Instantiate a **Locale** object.<br>
1. Instantiate a **Locale** object.
Create a **Locale** object by using the **Locale** constructor. This method receives a string representing the locale and an optional [Attributes](../reference/apis/js-apis-intl.md) list.
A **Locale** object consists of four parts: language, script, region, and extension, which are separated by using a hyphen (-).
...
...
@@ -42,30 +44,33 @@ Use [Locale](../reference/apis/js-apis-intl.md) APIs to maximize or minimize loc
| kf | Whether upper case or lower case is considered when sorting or comparing strings.|
2. Obtain the string representing a **Locale** object.<br>
2. Obtain the string representing a **Locale** object.
Call the **toString** method to obtain the string representing a **Locale** object, which includes the language, region, and other options.
```
```js
varlocaleStr=localeObj.toString();
```
3. Maximize locale information.<br>
3. Maximize locale information.
Call the **maximize** method to maximize locale information; that is, supplement the missing script and region information.
```
```js
varmaximizedLocale=localeObj.maximize();
```
4. Minimize locale information.<br>
4. Minimize locale information.
Call the **minimize** method to minimize locale information; that is, delete the unnecessary script and region information.
```
```js
varminimizedLocale=localeObj.minimize();
```
...
...
@@ -88,42 +93,46 @@ Use [DateTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the date
### How to Develop
1. Instantiate a **DateTimeFormat** object.<br>
1. Instantiate a **DateTimeFormat** object.
Use the default constructor of **DateTimeFormat** to obtain the system default locale by accessing the system language and region settings, and set it as the locale in the **DateTimeFormat** object.
```
```js
vardateTimeFormat=newintl.DateTimeFormat();
```
Alternatively, use your own locale and formatting parameters to create a **DateTimeFormat** object. Formatting parameters are optional. For a full list of formatting parameters, see [DateTimeOptions](../reference/apis/js-apis-intl.md).
Call the **format** method to format the date and time in the **DateTimeFormat** object. This method returns a string representing the formatting result.
```
```js
Datedate=newDate();
varformatResult=dateTimeFormat.format(date);
```
3. Format a period.<br>
3. Format a period.
Call the **formatRange** method to format the period in the **DateTimeFormat** object. This method requires input of two **Date** objects, which respectively indicate the start date and end date of a period. This method returns a string representing the formatting result.
4. Obtain attributes of the **DateTimeFormat** object.<br>
4. Obtain attributes of the **DateTimeFormat** object.
Call the **resolvedOptions** method to obtain attributes of the **DateTimeFormat** object. This method will return an array that contains all attributes and values of the object.
```
```js
varoptions=dateTimeFormat.resolvedOptions();
```
...
...
@@ -145,33 +154,36 @@ Use [NumberFormat](../reference/apis/js-apis-intl.md) APIs to format numbers for
### How to Develop
1. Instantiate a **NumberFormat** object.<br>
1. Instantiate a **NumberFormat** object.
Use the default constructor of **NumberFormat** to obtain the system default locale by accessing the system language and region settings, and set it as the locale in the **NumberFormat** object.
```
```js
varnumberFormat=newintl.NumberFormat();
```
Alternatively, use your own locale and formatting parameters to create a **NumberFormat** object. Formatting parameters are optional. For a full list of formatting parameters, see [NumberOptions](../reference/apis/js-apis-intl.md).
Call the **format** method to format a number. A string is returned as the formatting result.
```
```js
varnumber=1234.5678
varformatResult=numberFormat.format(number);
```
3. Obtain attributes of the **NumberFormat** object.<br>
3. Obtain attributes of the **NumberFormat** object.
Call the **resolvedOptions** method to obtain attributes of the **NumberFormat** object. This method will return an array that contains all attributes and values of the object.
```
```js
varoptions=numberFormat.resolvedOptions();
```
...
...
@@ -193,33 +205,36 @@ Use [Collator](../reference/apis/js-apis-intl.md) APIs to sort strings based on
### How to Develop
1. Instantiate a **Collator** object.<br>
1. Instantiate a **Collator** object.
Use the default constructor of **Collator** to obtain the system default locale by accessing the system language and region settings, and set it as the locale in the **Collator** object.
```
```js
varcollator=newintl.Collator();
```
Alternatively, use your own locale and formatting parameters to create a **Collator** object. For a full list of parameters, see [CollatorOptions](../reference/apis/js-apis-intl.md).
var collator= new intl.Collator("zh-CN", {localeMatcher: "best fit", usage: "sort"};
```
2. Compare two strings.<br>
2. Compare two strings.
Call the **compare** method to compare two input strings. This method returns a value as the comparison result. The return value **-1** indicates that the first string is shorter than the second string, the return value **1** indicates that the first string is longer than the second string, and the return value **0** indicates that the two strings are of equal lengths.
```
```js
varstr1="first string";
varstr2="second string";
varcompareResult=collator.compare(str1,str2);
```
3. Obtain attributes of the **Collator** object.<br>
3. Obtain attributes of the **Collator** object.
Call the **resolvedOptions** method to obtain attributes of the **Collator** object. This method will return an array that contains all attributes and values of the object.
```
```js
varoptions=collator.resolvedOptions();
```
...
...
@@ -240,24 +255,26 @@ Use [PluralRules](../reference/apis/js-apis-intl.md) APIs to determine the singu
### How to Develop
1. Instantiate a **PluralRules** object.<br>
1. Instantiate a **PluralRules** object.
Use the default constructor of **PluralRules** to obtain the system default locale by accessing the system language and region settings, and set it as the locale in the **PluralRules** object.
```
```js
varpluralRules=newintl.PluralRules();
```
Alternatively, use your own locale and formatting parameters to create a **PluralRules** object. For a full list of parameters, see [PluralRulesOptions](../reference/apis/js-apis-intl.md).
```
var plurals = new intl.PluralRules("zh-CN", {localeMatcher: "best fit", type: "cardinal"};
Call the **select** method to determine the singular-plural type of an input number. This method will return a string representing the singular-plural type, which can be any of the following: **zero**, **one**, **two**, **few**, **many**, and **other**.
```
```js
varnumber=1234.5678
varcategoryResult=plurals.select(number);
```
...
...
@@ -281,41 +298,45 @@ Use [RelativeTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the r
### How to Develop
1. Instantiate a **RelativeTimeFormat** object.<br>
1. Instantiate a **RelativeTimeFormat** object.
Use the default constructor of **RelativeTimeFormat** to obtain the system default locale by accessing the system language and region settings, and set it as the locale in the **RelativeTimeFormat** object.
Alternatively, use your own locale and formatting parameters to create a **RelativeTimeFormat** object. Formatting parameters are optional. For a full list of formatting parameters, see [ RelativeTimeFormatInputOptions](../reference/apis/js-apis-intl.md).
var relativeTimeFormat = new intl.RelativeTimeFormat("zh-CN", {numeric: "always", style: "long"};
```
2. Format the relative time.<br>
2. Format the relative time.
Call the **format** method to format the relative time. This method receives a numeric value representing the time length and a string-form unit, like **year**, **quarter**, **month**, **week**, **day**, **hour**, **minute**, and **second**. This method returns a string representing the formatting result.
4. Obtain attributes of the **RelativeTimeFormat** object.<br>
4. Obtain attributes of the **RelativeTimeFormat** object.
Call the **resolvedOptions** method to obtain attributes of the **RelativeTimeFormat** object. This method will return an array that contains all attributes and values of the object. For a full list of attributes, see [ RelativeTimeFormatResolvedOptions](../reference/apis/js-apis-intl.md).
This module provides the functions of tracing service processes and monitoring the system performance. It provides the data needed for hiTraceMeter to carry out performance analysis.
The Performance Tracing module provides the functions of tracing service processes and monitoring the system performance. It provides the data needed for hiTraceMeter to carry out performance analysis.
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
...
...
@@ -17,7 +18,7 @@ import hiTraceMeter from '@ohos.hiTraceMeter';
startTrace(name: string, taskId: number): void
Starts a trace task.**expectedTime** is an optional parameter, which specifies the expected duration of the trace.
Starts a trace task.
If multiple trace tasks with the same name need to be performed at the same time or a trace task needs to be performed multiple times concurrently, different task IDs must be specified in **startTrace**.
> The APIs of this module are no longer maintained since API version 7. You are advised to use ['@ohos.hilog](js-apis-hilog.md)' instead.
The Log module provides basic log printing capabilities and supports log printing by log level.
## console.debug
debug(message: string): void
If you want to use more advanced log printing services, for example, filtering logs by the specified ID, you are advised to use [`@ohos.hilog`](js-apis-hilog.md).
Prints debug logs.
- Parameters
| Name | Type | Mandatory | Description |
| ------- | ------ | ---- | ----------- |
| message | string | Yes | Text to print.|
> **NOTE**
>
> The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.batteryInfo`](js-apis-battery-info.md) instead.
> **NOTE**
> - The APIs of this module are no longer maintained since API version 6. You are advised to use [`@ohos.batteryInfo`](js-apis-battery-info.md).
>
> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
...
...
@@ -22,20 +22,13 @@ Obtains the current charging state and battery level.
> - The APIs of this module are no longer maintained since API version 7. It is recommended that you use [`@ohos.brightness`](js-apis-brightness.md) instead.
> **NOTE**
> - The APIs of this module are no longer maintained since API version 7. You are advised to use [`@ohos.brightness`](js-apis-brightness.md).
>
> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
...
...
@@ -24,34 +24,35 @@ Obtains the current screen brightness.
**Parameters**
| Name | Type | Mandatory | Description |
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| success | Function | No | Called when the execution is successful. |
| fail | Function | No | Called when the operation fails. |
| complete | Function | No | Called when the execution is complete |
| success | (data: [BrightnessResponse](#brightnessresponse)) => void | No| Called when API call is successful.|
| fail | (data: string, code: number) => void | No| Called when API call has failed.|
| complete | () => void | No| Called when API call is complete.|
The following values will be returned when the operation is successful.
**Return value of success()**
| Name | Type | Description |
| Name| Type| Description|
| -------- | -------- | -------- |
| value | number | Screen brightness, which ranges from 1 to 255. |
| value | number | Screen brightness. The value is an integer ranging from **1** to **255**.|
**Example**
```js
exportdefault{
getValue(){
brightness.getValue({
success:function(data){
console.log('success get brightness value:'+data.value);
| value | number | Yes | Screen brightness. The value is an integer ranging from 1 to 255.<br/>- If the value is less than or equal to **0**, value **1** will be used.<br/>- If the value is greater than **255**, value **255** will be used.<br/>- If the value contains decimals, the integral part of the value will be used. For example, if value **8.1** is set, value **8** will be used. |
| success | Function | No | Called when the execution is successful. |
| fail | Function | No | Called when the operation fails. |
| complete | Function | No | Called when the execution is complete. |
| value | number | Yes| Screen brightness. The value is an integer ranging from **1** to **255**.<br>- If the value is less than or equal to **0**, value **1** will be used.<br>- If the value is greater than **255**, value **255** will be used.<br>- If the value contains decimals, the integral part of the value will be used. For example, if value **8.1** is set, value **8** will be used.|
| success | () => void | No| Called when API call is successful.|
| fail | (data: string, code: number) => void | No| Called when API call has failed.|
| complete | () => void | No| Called when API call is complete.|
**Example**
```js
exportdefault{
setValue(){
brightness.setValue({
value:100,
success:function(){
console.log('handling set brightness success.');
},
fail:function(data,code){
console.log('handling set brightness value fail, code:'+code+', data: '+data);
},
});
},
}
```
```js
exportdefault{
setValue(){
brightness.setValue({
value:100,
success:function(){
console.log('handling set brightness success.');
},
fail:function(data,code){
console.log('handling set brightness value fail, code:'+code+', data: '+data);
},
});
},
}
```
## brightness.getMode
...
...
@@ -100,34 +101,34 @@ Obtains the screen brightness adjustment mode.
**Parameters**
| Name | Type | Mandatory | Description |
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| success | Function | No | Called when the execution is successful. |
| fail | Function | No | Called when the operation fails. |
| complete | Function | No | Called when the execution is complete |
| success | (data: [BrightnessModeResponse](#brightnessmoderesponse)) => void | No| Called when API call is successful.|
| fail | (data: string, code: number) => void | No| Called when API call has failed.|
| complete | () => void | No| Called when API call is complete.|
The following values will be returned when the operation is successful.
**Return value of success()**
| Name | Type | Description |
| Name| Type| Description|
| -------- | -------- | -------- |
| mode | number | The value can be **0** or **1**.<br/>- **0**: The screen brightness is manually adjusted.<br/>- **1**: The screen brightness is automatically adjusted. |
| mode | number | The value can be **0** or **1**.<br>- **0**: manual adjustment<br>- **1**: automatic adjustment|
**Example**
```js
exportdefault{
getMode(){
brightness.getMode({
success:function(data){
console.log('success get mode:'+data.mode);
},
fail:function(data,code){
console.log('handling get mode fail, code:'+code+', data: '+data);
},
});
},
}
```
```js
exportdefault{
getMode(){
brightness.getMode({
success:function(data){
console.log('success get mode:'+data.mode);
},
fail:function(data,code){
console.log('handling get mode fail, code:'+code+', data: '+data);
},
});
},
}
```
## brightness.setMode
...
...
@@ -139,31 +140,30 @@ Sets the screen brightness adjustment mode.