更新有关语言更改的ListPreference摘要 [英] Update ListPreference summary on language change

问题描述

当在我的ListPreference中选择了一种新语言时，我将其更改并重新加载我的Fragment以便应用它，例如:

When a new language is selected in my ListPreference, I change it and reload my Fragment in order to apply it, like such:

 listPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object newValue) {
            // Get selected language
            String selectedLanguage = newValue.toString();
            preference.setSummary(selectedLanguage);

            // Change language
            Locale locale;
            if (selectedLanguage.equals("French")) {
                locale = new Locale("fr");
            } else {
                locale = new Locale("en");
            }
            Locale.setDefault(locale);
            Configuration config = new Configuration();
            config.locale = locale;
            getActivity().getApplicationContext().getResources().updateConfiguration(config, null);

            // Refresh fragment
            getFragmentManager().beginTransaction()
                    .replace(R.id.content_frame, new SettingsFragment())
                    .commit();
            return true;
        }
    });

每个示例，如果选择了法语，它将确实将法语应用于我的所有字符串(在strings-fr.xml文件中定义)，但是对于我的ListPreference摘要却不这样做(即使它们具有它们的在正确的文件中翻译).

Per exemple, if French is chosen, it does apply the French language to all of my strings (defines in a strings-fr.xml file) but it does not do so for my ListPreferences summaries (even though they have their translation in the right files).

两个问题:

• 是否有更好的方法来加载我的语言，而不是重新加载我的Fragment?

如何将ListPreference摘要更新为正确的语言?

And how may I update my ListPreferences summary to the right language?

推荐答案

有没有更好的方法来加载我的语言，而不是重新加载我的语言 碎片?

Is there a better way to load my language instead of reloading my Fragment?

我认为这是立即加载新语言的最佳方法.但是，Activity/Application重新启动后，它可能不会继续.在这种情况下，您需要检查SharedPreferences中的语言并将其加载到Activity/Application onCreate():

I think this would be the best way for an immediate load of the new langauage. It may not continue after Activity/Application restart though. In that case, you would need to check the language from SharedPreferences and load it in the Activity/Application onCreate():

private Locale locale = null;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    final Configuration config = getBaseContext().getResources().getConfiguration();
    final String language = PreferenceManager.getDefaultSharedPreferences(this).getString("language", "");
    if (!TextUtils.isEmpty(language) && !config.locale.getLanguage().equals(language))
    {
        locale = new Locale(language);
        setLocale(config);
    }

    setContentView(R.layout.main_activity);
    ...
}

如何将ListPreferences摘要更新为正确的语言?

And how may I update my ListPreferences summary to the right language?

您的问题是缺少XML文件，但这是我通常的做法，每次都可以正常工作，而无需以编程方式更新摘要:

Your question is missing XML files but here is how I usually do that and it works just fine for me every time and I don't need to update the summary programmatically:

preferences.xml

<ListPreference
    android:defaultValue="en"
    android:entries="@array/language_names"
    android:entryValues="@array/language_values"
    android:icon="@drawable/ic_language"
    android:key="language"
    android:summary="@string/current_language"
    android:title="@string/language_title"/>

strings.xml

<string-array name="language_names">
    <item>English</item>
    <item>French</item>
</string-array>
<string-array name="language_values">
    <item>en</item>
    <item>fr</item>
</string-array>
<string name="current_language">English</string>

strings-fr.xml

<string-array name="language_names">
    <item>Anglais</item>
    <item>Français</item>
</string-array>
<string name="current_language">Français</string>

这篇关于更新有关语言更改的ListPreference摘要的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！