Android:如何在特定区域设置中获取字符串而不更改当前区域设置

时间:2013-07-21 10:50:42

标签: android localization locale android-resources

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依赖于用户设备的区域设置。 另一方面,您不希望仅为您的(技术)日志记录更改用户设备的区域设置。 这可以实现吗? 我在stackoverflow上找到了几个可能的解决方案:

但是,它们都会导致更改设备的区域设置(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;
}

说实话,我根本不喜欢这种做法。它并不高效 - 考虑并发性和所有这些 - 它可能导致“错误”区域设置中的某些视图。

所以 - 任何想法?也许这可以使用ResourceBundle来实现,就像在标准Java中一样?

5 个答案:

答案 0 :(得分:22)

您可以将其用于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): Check this article

答案 1 :(得分:3)

您可以将Map内的默认语言环境的所有字符串保存在全局类中,例如启动应用时执行的Application

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);
    }

}

此解决方案不是最佳解决方案,但您不会遇到并发问题。

答案 2 :(得分:1)

感谢@Khaled Lela的回答,我进行了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ActivityFragmentContext相关类中使用,只需调用:

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

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

答案 3 :(得分: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);
}

答案 4 :(得分:-2)

试试这个:

  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);