46

用例：记录显示给用户的错误消息。

但是，您不希望日志中的消息取决于用户设备的区域设置。另一方面，您不想仅仅为了您的（技术）日志记录而更改用户设备的区域设置。这可以实现吗？我在 stackoverflow 上找到了几个潜在的解决方案：

但是，它们都会导致更改我的设备的区域设置（直到下一次配置更改）。

无论如何，我目前的解决方法是这样的：

public String getStringInDefaultLocale(int resId) {
    Resources currentResources = getResources();
    AssetManager assets = currentResources.getAssets();
    DisplayMetrics metrics = currentResources.getDisplayMetrics();
    Configuration config = new Configuration(
            currentResources.getConfiguration());
    config.locale = DEFAULT_LOCALE;
    /*
     * Note: This (temporiarily) changes the devices locale! TODO find a
     * better way to get the string in the specific locale
     */
    Resources defaultLocaleResources = new Resources(assets, metrics,
            config);
    String string = defaultLocaleResources.getString(resId);
    // Restore device-specific locale
    new Resources(assets, metrics, currentResources.getConfiguration());
    return string;
}

老实说，我根本不喜欢这种方法。它效率不高，并且 - 考虑并发性和所有这些 - 它可能会导致“错误”语言环境中的某些视图。

所以 - 有什么想法吗？也许这可以使用ResourceBundle来实现，就像在标准 Java 中一样？

4

5 回答 5

47

你可以用这个API +17

@NonNull
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static String getStringByLocal(Activity context, int id, String locale) {
    Configuration configuration = new Configuration(context.getResources().getConfiguration());
    configuration.setLocale(new Locale(locale));
    return context.createConfigurationContext(configuration).getResources().getString(id);
}

更新（1）：如何支持旧版本。

@NonNull
public static String getStringByLocal(Activity context, int resId, String locale) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
        return getStringByLocalPlus17(context, resId, locale);
    else
        return getStringByLocalBefore17(context, resId, locale);
}

@NonNull
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static String getStringByLocalPlus17(Activity context, int resId, String locale) {
    Configuration configuration = new Configuration(context.getResources().getConfiguration());
    configuration.setLocale(new Locale(locale));
    return context.createConfigurationContext(configuration).getResources().getString(resId);
}

private static String getStringByLocalBefore17(Context context,int resId, String language) {
    Resources currentResources = context.getResources();
    AssetManager assets = currentResources.getAssets();
    DisplayMetrics metrics = currentResources.getDisplayMetrics();
    Configuration config = new Configuration(currentResources.getConfiguration());
    Locale locale = new Locale(language);
    Locale.setDefault(locale);
    config.locale = locale;
/*
 * Note: This (temporarily) changes the devices locale! TODO find a
 * better way to get the string in the specific locale
 */
    Resources defaultLocaleResources = new Resources(assets, metrics, config);
    String string = defaultLocaleResources.getString(resId);
    // Restore device-specific locale
    new Resources(assets, metrics, currentResources.getConfiguration());
    return string;
}

更新（2）： 查看这篇文章

于 2017-01-28T08:23:53.763 回答
4

您可以将默认语言环境的所有字符串保存在Map全局类中，就像Application启动应用程序时执行的那样：

public class DualLocaleApplication extends Application {

    private static Map<Integer, String> defaultLocaleString;

    public void onCreate() {
        super.onCreate();
        Resources currentResources = getResources();
        AssetManager assets = currentResources.getAssets();
        DisplayMetrics metrics = currentResources.getDisplayMetrics();
        Configuration config = new Configuration(
                currentResources.getConfiguration());
        config.locale = Locale.ENGLISH;
        new Resources(assets, metrics, config);
        defaultLocaleString = new HashMap<Integer, String>();
        Class<?> stringResources = R.string.class;
        for (Field field : stringResources.getFields()) {
            String packageName = getPackageName();
            int resId = getResources().getIdentifier(field.getName(), "string", packageName);
            defaultLocaleString.put(resId, getString(resId));
        }
        // Restore device-specific locale
        new Resources(assets, metrics, currentResources.getConfiguration());
    }

    public static String getStringInDefaultLocale(int resId) {
        return defaultLocaleString.get(resId);
    }

}

这个解决方案不是最优的，但不会有并发问题。

于 2013-10-15T01:53:49.370 回答
3

感谢@Khaled Lela 的回答，我做了一个 Kotlin 扩展：

fun Context.getStringByLocale(@StringRes stringRes: Int, locale: Locale, vararg formatArgs: Any): String {
    val configuration = Configuration(resources.configuration)
    configuration.setLocale(locale)
    return createConfigurationContext(configuration).resources.getString(stringRes, *formatArgs)
}

我直接在一个或相关的类中使用Activity，只是简单地调用：FragmentContext

getStringByLocale(R.string.my_text, Locale.UK)或带参数：

getStringByLocale(R.string.my_other_text, Locale.RU, arg1, arg2, arg3)

于 2020-06-26T13:55:10.550 回答
0

对于 api +17，我们可以使用：

public static String getDefaultString(Context context, @StringRes int stringId){
    Resources resources = context.getResources();
    Configuration configuration = new Configuration(resources.getConfiguration());
    Locale defaultLocale = new Locale("en");
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        LocaleList localeList = new LocaleList(defaultLocale);
        configuration.setLocales(localeList);
        return context.createConfigurationContext(configuration).getString(stringId);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
        configuration.setLocale(defaultLocale);
        return context.createConfigurationContext(configuration).getString(stringId);
    }
    return context.getString(stringId);
}
于 2017-12-15T13:53:50.557 回答
-2

尝试这个：

  Configuration conf = getResources().getConfiguration();
  conf.locale = new Locale("ar"); // locale I used here is Arabic

  Resources resources = new Resources(getAssets(), getResources().getDisplayMetrics(), conf);
  /* get localized string */
  String appName = resources.getString(R.string.app_name);
于 2014-03-14T16:21:01.427 回答