Method getLanguage

app/src/main/java/eu/faircode/email/HtmlHelper.java:2642–2663

(Context context, String subject, String text)

    }

    static String getLanguage(Context context, String subject, String text) {
        try {
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
            boolean language_detection = prefs.getBoolean("language_detection", false);
            if (!language_detection)
                return null;

            StringBuilder sb = new StringBuilder();
            if (!TextUtils.isEmpty(subject))
                sb.append(subject).append('\n');
            if (!TextUtils.isEmpty(text))
                sb.append(text);
            if (sb.length() == 0)
                return null;

            Locale locale = TextHelper.detectLanguage(context, sb.toString());
            return (locale == null ? null : locale.getLanguage());
        } catch (Throwable ex) {
            Log.e(ex);
            return null;
        }
    }

    static String getPreview(String text) {
        if (text == null)