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en/application-dev/internationalization/i18n-guidelines.md
浏览文件 @ 6e64b024
......@@ -23,57 +23,64 @@ You can use APIs provided in the following table to obtain the system language a
### How to Develop
1. Obtain the system language.<br>
1. Obtain the system language.
Call the **getSystemLanguage** method to obtain the system language (**i18n** is the name of the imported module).
```
```js
var language = i18n.getSystemLanguage();
```
2. Obtain the system region.<br>
2. Obtain the system region.
Call the **getSystemRegion** method to obtain the system region.
```
```js
var region = i18n.getSystemRegion();
```
3. Obtain the system locale.<br>
3. Obtain the system locale.
Call the **getSystemLocale** method to obtain the system locale.
```
```js
var locale = i18n.getSystemLocale();
```
4. Check whether the locale's language is RTL.<br>
4. Check whether the locale's language is RTL.
Call the **isRTL** method to check whether the locale's language is RTL.
```
```js
var rtl = i18n.isRTL("zh-CN");
```
5. Check whether the system uses a 24-hour clock.<br>
5. Check whether the system uses a 24-hour clock.
Call the **is24HourClock** method to check whether the system uses a 24-hour clock.
```
```js
var hourClock = i18n.is24HourClock();
```
6. Obtain the localized display of a language.<br>
6. Obtain the localized display of a language.
Call the **getDisplayLanguage** method to obtain the localized display of a language. **language** indicates the language to be localized, **locale** indicates the locale, and **sentenceCase** indicates whether the first letter of the result must be capitalized.
```
```js
var language = "en";
var locale = "zh-CN";
var sentenceCase = false;
var localizedLanguage = i18n.getDisplayLanguage(language, locale, sentenceCase);
```
7. Obtain the localized display of a country.<br>
7. Obtain the localized display of a country.
Call the **getDisplayCountry** method to obtain the localized display of a country name. **country** indicates the country code (a two-letter code in compliance with ISO-3166, for example, CN), **locale** indicates the locale, and **sentenceCase** indicates whether the first letter of the result must be capitalized.
```
```js
var country = "US";
var locale = "zh-CN";
var sentenceCase = false;
......@@ -106,70 +113,78 @@ You can use APIs provided in the following table to obtain the system language a
### How to Develop
1. Instantiate a **Calendar** object.<br>
1. Instantiate a **Calendar** object.
Call the **getCalendar** method to obtain the time zone object of a specific locale and type (**i18n** is the name of the imported module). **type** indicates the valid calendar type, for example, **buddhist**, **chinese**, **coptic**, **ethiopic**, **hebrew**, **gregory**, **indian**, **islamic_civil**, **islamic_tbla**, **islamic_umalqura**, **japanese**, and **persian**. If **type** is left unspecified, the default calendar type of the locale is used.
```
```js
var calendar = i18n.getCalendar("zh-CN", "gregory);
```
2. Set the time for the **Calendar** object.<br>
2. Set the time for the **Calendar** object.
Call the **setTime** method to set the time of the **Calendar** object. This method receives two types of parameters. One is a **Date** object, and the other is a value indicating the number of milliseconds elapsed since January 1, 1970, 00:00:00 GMT.
```
```js
var date1 = new Date();
calendar.setTime(date1);
var date2 = 1000;
calendar.setTime(date2);
```
3. Set the year, month, day, hour, minute, and second for the **Calendar** object.<br>
3. Set the year, month, day, hour, minute, and second for the **Calendar** object.
Call the **set** method to set the year, month, day, hour, minute, and second for the **Calendar** object.
```
```js
calendar.set(2021, 12, 21, 6, 0, 0)
```
4. Set and obtain the time zone for the **Calendar** object.<br>
4. Set and obtain the time zone for the **Calendar** object.
Call the **setTimeZone** and **getTimeZone** methods to set and obtain the time zone for the **Calendar** object. The **setTimeZone** method requires an input string to indicate the time zone to be set.
```
```js
calendar.setTimeZone("Asia/Shanghai");
var timezone = calendar.getTimeZone();
```
5. Set and obtain the first day of a week for the **Calendar** object.<br>
5. Set and obtain the first day of a week for the **Calendar** object.
Call the **setFirstDayOfWeek** and **getFirstDayOfWeek** methods to set and obtain the first day of a week for the **Calendar** object. **setFirstDayOfWeek** must be set to a value indicating the first day of a week. The value **1** indicates Sunday, and the value **7** indicates Saturday.
```
```js
calendar.setFirstDayOfWeek(1);
var firstDayOfWeek = calendar.getFirstDayOfWeek();
```
6. Set and obtain the minimum count of days in the first week for the **Calendar** object.<br>
6. Set and obtain the minimum count of days in the first week for the **Calendar** object.
Call the **setMinimalDaysInFirstWeek** and **getMinimalDaysInFirstWeek** methods to set and obtain the minimum count of days in the first week for the **Calendar** object.
```
```js
calendar.setMinimalDaysInFirstWeek(3);
var minimalDaysInFirstWeek = calendar.getMinimalDaysInFirstWeek();
```
7. Obtain the localized display of the **Calendar** object.<br>
7. Obtain the localized display of the **Calendar** object.
Call the **getDisplayName** method to obtain the localized display of the **Calendar** object.
```
```js
var localizedName = calendar.getDisplayName("zh-CN");
```
8. Check whether a date is a weekend.<br>
8. Check whether a date is a weekend.
Call the **isWeekend** method to determine whether the input date is a weekend.
```
```js
var date = new Date();
var weekend = calendar.isWeekend(date);
```
......@@ -191,25 +206,26 @@ You can use APIs provided in the following table to obtain the system language a
### How to Develop
1. Instantiate a **PhoneNumberFormat** object.<br>
1. Instantiate a **PhoneNumberFormat** object.
Call the **PhoneNumberFormat** constructor to instantiate a **PhoneNumberFormat** object. The country code and formatting options of the phone number need to be passed into this constructor. The formatting options are optional, including a style option. Values of this option include: **E164**, **INTERNATIONAL**, **NATIONAL**, and **RFC3966**.
```
```js
var phoneNumberFormat = new i18n.PhoneNumberFormat("CN", {type: "E164"});
```
2. Check whether the phone number format is correct.
Call the **isValidNumber** method to check whether the format of the input phone number is correct.
```
```js
var validNumber = phoneNumberFormat.isValidNumber("15812341234");
```
3. Format a phone number.
Call the **format** method of **PhoneNumberFormat** to format the input phone number.
```
```js
var formattedNumber = phoneNumberFormat.format("15812341234");
```
......@@ -232,7 +248,7 @@ The **unitConvert** API is provided to help you implement measurement conversion
Call the [unitConvert](../reference/apis/js-apis-intl.md) method to convert a measurement unit and format the display result.
```
```js
var fromUnit = {unit: "cup", measureSystem: "US"};
var toUnit = {unit: "liter", measureSystem: "SI"};
var number = 1000;
......@@ -259,32 +275,36 @@ The **unitConvert** API is provided to help you implement measurement conversion
### How to Develop
1. Instantiate an **IndexUtil** object.<br>
1. Instantiate an **IndexUtil** object.
Call the **getInstance** method to instantiate an **IndexUtil** object for a specific locale. When the **locale** parameter is empty, instantiate an **IndexUtil** object of the default locale.
```
```js
var indexUtil = getInstance("zh-CN");
```
2. Obtain the index list.<br>
2. Obtain the index list.
Call the **getIndexList** method to obtain the alphabet index list of the current locale.
```
```js
var indexList = indexUtil.getIndexList();
```
3. Add an index.<br>
3. Add an index.
Call the **addLocale** method to add the alphabet index of a new locale to the current index list.
```
```js
indexUtil.addLocale("ar")
```
4. Obtain the index of a string.<br>
4. Obtain the index of a string.
Call the **getIndex** method to obtain the alphabet index of a string.
```
```js
var text = "access index";
indexUtil.getIndex(text);
```
......@@ -313,38 +333,42 @@ When a text is displayed in more than one line, [BreakIterator](../reference/api
### How to Develop
1. Instantiate a **BreakIterator** object.<br>
1. Instantiate a **BreakIterator** object.
Call the **getLineInstance** method to instantiate a **BreakIterator** object.
```
```js
var locale = "en-US"
var breakIterator = i18n.getLineInstance(locale);
```
2. Set and access the text that requires line breaking.<br>
2. Set and access the text that requires line breaking.
Call the **setLineBreakText** and **getLineBreakText** methods to set and access the text that requires line breaking.
```
```js
var text = "Apple is my favorite fruit";
breakIterator.setLineBreakText(text);
var breakText = breakIterator.getLineBreakText();
```
3. Obtain the current position of the **BreakIterator** object.<br>
3. Obtain the current position of the **BreakIterator** object.
Call the **current** method to obtain the current position of the **BreakIterator** object in the text being processed.
```
```js
var pos = breakIterator.current();
```
4. Set the position of a **BreakIterator** object.<br>
4. Set the position of a **BreakIterator** object.
The following APIs are provided to adjust the **first**, **last**, **next**, **previous**, or **following** position of the **BreakIterator** object in the text to be processed.
```
```js
var firstPos = breakIterator.first(); // Set a BreakIterator object to the first break point, that is, the start position of the text.
var lastPos = breakIterator.last(); // Set a BreakIterator object to the last break point, that is, the position after the text end.
// Move a BreakIterator object forward or backward by a certain number of break points.
......@@ -356,10 +380,11 @@ When a text is displayed in more than one line, [BreakIterator](../reference/api
var followingPos = breakIterator.following(10);
```
5. Determine whether a position is a break point.<br>
5. Determine whether a position is a break point.
Call the **isBoundary** method to determine whether a position is a break point. If yes, **true** is returned and the **BreakIterator** object is moved to this position. If no, **false** is returned and the **BreakIterator** object is moved to a break point after this position.
```
```js
var isboundary = breakIterator.isBoundary(5);
```
en/application-dev/internationalization/intl-guidelines.md
浏览文件 @ 6e64b024
......@@ -3,7 +3,8 @@
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.|
```
```js
var locale = "zh-CN";
var options = {caseFirst: false, calendar: "chinese", collation: pinyin};
var localeObj = new intl.Locale(locale, options);
```
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
var localeStr = 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
var maximizedLocale = 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
var minimizedLocale = 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
var dateTimeFormat = new intl.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).
```
```js
var options = {dateStyle: "full", timeStyle: "full"};
var dateTimeFormat = new intl.DateTimeFormat("zh-CN", options);
```
2. Format the date and time.<br>
2. Format the date and time.
Call the **format** method to format the date and time in the **DateTimeFormat** object. This method returns a string representing the formatting result.
```
```js
Date date = new Date();
var formatResult = 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.
```
```js
Date startDate = new Date();
Date endDate = new Date();
var formatResult = dateTimeFormat.formatRange(startDate, endDate);
```
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
var options = 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
var numberFormat = new intl.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).
```
```js
var options = {compactDisplay: "short", notation: "compact"};
var numberFormat = new intl.NumberFormat("zh-CN", options);
```
2. Format a number.<br>
2. Format a number.
Call the **format** method to format a number. A string is returned as the formatting result.
```
```js
var number = 1234.5678
var formatResult = 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
var options = 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
var collator = new intl.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).
```js
var collator= new intl.Collator("zh-CN", {localeMatcher: "best fit", usage: "sort"});
```
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
var str1 = "first string";
var str2 = "second string";
var compareResult = 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
var options = 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
var pluralRules = new intl.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"};
```js
var plurals = new intl.PluralRules("zh-CN", {localeMatcher: "best fit", type: "cardinal"});
```
2. Determine the singular-plural type.<br>
2. Determine the singular-plural type.
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
var number = 1234.5678
var categoryResult = 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.
```
```js
var relativeTimeFormat = new intl.RelativeTimeFormat();
```
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).
```
```js
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.
```
```js
var number = 2;
var unit = "year"
var formatResult = relativeTimeFormat.format(number, unit);
```
3. Obtain each part of the relative time format.<br>
3. Obtain each part of the relative time format.
Upon obtaining each part of the relative time format, customize the relative time formatting result.
```
```js
var number = 2;
var unit = "year"
var formatResult = relativeTimeFormat.formatToParts(number, unit);
```
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).
```
```js
var options = numberFormat.resolvedOptions();
```
en/application-dev/reference/apis/js-apis-bytrace.md
浏览文件 @ 6e64b024
......@@ -7,7 +7,7 @@
## Modules to Import
```
```js
import bytrace from '@ohos.bytrace';
```
......@@ -35,7 +35,7 @@ Marks the start of a timeslice trace task.
**Example**
```
```js
bytrace.startTrace("myTestFunc", 1);
bytrace.startTrace("myTestFunc", 1, 5); // The expected duration of the trace is 5 ms.
```
......@@ -62,7 +62,7 @@ Marks the end of a timeslice trace task.
**Example**
```
```js
bytrace.finishTrace("myTestFunc", 1);
```
......@@ -105,7 +105,7 @@ Defines the variable that indicates the number of timeslice trace tasks.
**Example**
```
```js
let traceCount = 3;
bytrace.traceByValue("myTestCount", traceCount);
traceCount = 4;
......
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