Change locale of the app

ChangeLocale.java

private void setLocale(String language, String country) {
        Locale locale = buildLocaleWith(language, country);
        Resources res = InstrumentationRegistry.getContext().getResources();
        Configuration config = res.getConfiguration();
        setLocaleInto(config, locale);
        res.updateConfiguration(config, res.getDisplayMetrics());
    }

    @NonNull
    private Locale buildLocaleWith(String language, String country) {
        Locale locale = new Locale(language, country);
        Locale.setDefault(locale);
        return locale;
    }

    @SuppressWarnings("deprecation")
    private void setLocaleInto(Configuration config, Locale locale) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            config.setLocale(locale);
        } else {
            config.locale = locale;
        }
    }