Change Locale not work after migrate to Androidx

I have an old project that supports multi-languages. I want to upgrade support library and target platform, Before migrating to Androidx everything works fine but now change language not work!

I use this code to change default locale of App

private static Context updateResources(Context context, String language)
{
    Locale locale = new Locale(language);
    Locale.setDefault(locale);

    Configuration configuration = context.getResources().getConfiguration();
    configuration.setLocale(locale);

    return context.createConfigurationContext(configuration);
}

And call this method on each activity by override attachBaseContext like this:

@Override
protected void attachBaseContext(Context newBase)
{
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
    String language = preferences.getString(SELECTED_LANGUAGE, "fa");
    super.attachBaseContext(updateResources(newBase, language));
}

I try other method to get string and I noticed that ‍‍‍‍getActivity().getBaseContext().getString work and getActivity().getString not work. Even the following code does not work and always show app_name vlaue in default resource string.xml.

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/app_name"/>

I share a sample code in https://github.com/Freydoonk/LanguageTest

Also getActivity()..getResources().getIdentifier not work and always return 0!

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