Question

在我的测试Android项目中，我使用了StringArray resource的以下语言：

<resources>
    <string-array name="ueTTSLangSelectorSpinnerValues">
        <item>
            English
        </item>
        <item>
            Deutsch
        </item>
        <item>
            Français
        </item>
        <item>
            Italiano
        </item>
    </string-array>
    </resources>

，它正在提供Spinner语言选择器。因此，当用户选择语言时，我需要找到对应语言的Locale：

m_ueLangSelectorSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
    @Override
    public void onItemClick(AdapterView<?> parent,
                            View view,
                            int position,
                            long id)
    {
        // language has been selected, search for its VALID locale and prepare found locale for Text to Speech engine

        int ueSelectedLanguageIndex=m_ueLangSelectorSpinner.getSelectedItemPosition();  // get selected language index

        if(((ueSelectedLanguageIndex>=0)&&(ueSelectedLanguageIndex<m_ueLangSelectorSpinner.getCount())))
        {
            // selected language index is valid, fetch it

            String ueSelectedLanguage=m_ueAvailableLanguages[ueSelectedLanguageIndex];
            Locale ueSelectedLocale=Locale.forLanguageTag(ueSelectedLanguage);
        }   // if
    }   // onItemClick
});

，但是我得到了无效/空的语言环境。为什么？

Answer 1

看看forLanguageTag的{{3}}，我认为您的问题是格式错误的语言标签，您不能只使用“英语”和“德语”作为语言标签，正确的标签应该是“ zh-cn”之类的标签或类似的标签（有关详细信息，请参阅文档）

Answer 2

我找到了一种选择语言的方法（将String中的Spinner还原为前两个字符，然后将其小写。结果为ISO 639-2 language code，可以将其传递给以下一种语言Locale's constructor：

m_ueLangSelectorSpinner.setOnItemSelectedListener(new OnItemSelectedListener()
{
    /**
     * @brief Spinner selection click handler
     * @param parent
     * @param view
     * @param position
     * @param id
     */
    @Override
    public void onItemSelected(AdapterView<?> parent,
                               View view,
                               int position,
                               long id)
    {
        // Language has been selected, search for its VALID locale and prepare found locale for Text to Speech engine

        int ueSelectedLanguageIndex=m_ueLangSelectorSpinner.getSelectedItemPosition();  // get selected language index
        String ueSelectedLanguage;      // selected language
        String ueTTSSpeakButtonText;    // speak button text for selected language

        m_ueTTSTextEntryField.setText("");              // on language change, clear text
        m_ueTTSTextEntryField.setEnabled(false);        // disable button since text is empty
        m_ueTTSTextEntryField.setClickable(false);      // disables button clicking since text is empty

        if(((ueSelectedLanguageIndex>=0)&&(ueSelectedLanguageIndex<m_ueLangSelectorSpinner.getCount())))
        {
            // Selected language index is valid, fetch it and transforms it to locale name

            ueSelectedLanguage=m_ueAvailableLanguages[ueSelectedLanguageIndex];      // get selected language name

            if(ueSelectedLanguage.length()>=2)
            {
                // Size of selected language string is ok, transform it to locale name and create locale object

                ueTTSSpeakButtonText=m_ueAvailableTTSSpeakButtonTexts[ueSelectedLanguageIndex];  // get speak button text
                m_ueTSSSpeakButton.setText(ueTTSSpeakButtonText); // update button "speak" text
                m_ueSelectedLanguageLocale=new Locale(ueSelectedLanguage.substring(0,
                        2).toLowerCase());  // creates locale
            }   // if
        }   // if
    }   // onItemSelected

从所选语言获取语言环境

2 个答案: