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| == Interface and Class Details ==
| | {{Migrating|https://smartpossdk.gitbook.io/cloudpossdk/faq/settings-menu/set-language-api}} |
| * Package Name: ''''com.wizarpos.wizarviewagentassistant''''
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| * Class Name: ''''com.wizarpos.wizarviewagentassistant.SystemExtApiService''''
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| * Ensure to import ''''wizarviewagentassistant'''' when using this interface.
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| == Version Requirement ==
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| * The version of ''''wizarviewagentassistant'''' should be 2.10.60 or higher.
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| == API Function ==
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| === <big>Set Language</big> ===
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| * ''''boolean setLanguage(String language, String country, String variant)'''';
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| * Sets the system language. Specify the language, country, and any variant if applicable.
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| {|class="wizarpostable" | |
| |-
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| ! scope="row" colspan="2" | Parameters
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| |-
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| | language|| '''String :''' (Null is not allowed)An ISO 639 alpha-2 or alpha-3 language code, or a language subtag up to 8 characters in length. See the Locale class description about valid language values.
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| |-
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| | country|| '''String :''' (Null is allowed)An ISO 3166 alpha-2 country code or a UN M.49 numeric-3 area code. See the Locale class description about valid country values.
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| |-
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| | variant|| '''String :''' (Null is allowed)Any arbitrary value used to indicate a variation of a Locale. See the Locale class description for the details.
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| |}
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| {|
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| |-
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| |}
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| {|class="wizarpostable" | |
| |-
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| ! scope="row" colspan="2" | Returns
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| |-
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| | boolean || true:set success ; false: set failed;
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| |}
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| == Resources for Download ==
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| * '''AIDL File:''' Download the necessary [http://ftp.wizarpos.com/advanceSDK/ISystemExtApi.aidl AIDL file] for implementation.
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| * '''Demo:''' A [http://ftp.wizarpos.com/advanceSDK/example_enableethernet_mtp_setlanguage.7z demo] is available for download to provide practical guidance.
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