Method getLocalizedAsset

app/src/main/java/eu/faircode/email/Helper.java:2605–2652

(Context context, String name)

    }

    static String getLocalizedAsset(Context context, String name) throws IOException {
        if (name == null || !name.contains("."))
            throw new IllegalArgumentException(name);

        String[] list = context.getResources().getAssets().list("");
        if (list == null)
            throw new IllegalArgumentException();

        List<String> names = new ArrayList<>();
        String[] c = name.split("\\.");
        List<String> assets = Arrays.asList(list);

        List<Locale> locales = new ArrayList<>();
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
            locales.add(Locale.getDefault());
        else {
            LocaleList ll = context.getResources().getConfiguration().getLocales();
            for (int i = 0; i < ll.size(); i++)
                locales.add(ll.get(i));
        }

        for (Locale locale : locales) {
            String language = locale.getLanguage();
            String country = locale.getCountry();
            if ("en".equals(language) && "US".equals(country))
                names.add(name);
            else {
                String localized = c[0] + "-" + language + "-r" + country + "." + c[1];
                if (assets.contains(localized))
                    names.add(localized);
            }
        }

        for (Locale locale : locales) {
            String prefix = c[0] + "-" + locale.getLanguage();
            for (String asset : assets)
                if (asset.startsWith(prefix))
                    names.add(asset);
        }

        names.add(name);

        String asset = names.get(0);
        Log.i("Using " + asset +
                " of " + TextUtils.join(",", names) +
                " (" + TextUtils.join(",", locales) + ")");
        return asset;
    }

    static boolean containsWhiteSpace(String text) {
        return text.matches(".*\\s+.*");