How to recreate previous activity?

Question

I have a main activity (let's call it A) and a second activity (let's call it B) which's used to change the language of the app. The point is, when I click the button to change the language I also call recreate(); and B changes it language. Until here it's ok. The problem comes when I go back to the main activity (A) and it hasn't updated the language because it hasn't been recreated, so, is there any way to recreate A from B in order to update A?

I use this code to translate the app (eng version example):

public void btnIngles_onClick(View v)
{
    Locale locale = new Locale("en");
    Locale.setDefault(locale);

    Configuration config = new Configuration();
    config.locale = locale;
    this.getApplicationContext().getResources().updateConfiguration(config, null);
    recreate();
}

Answer 1

1) Activity B changes some global settings, accessible via SharedPreferences for example

2) In Activity A do:

@Override
protected void onResume() {
    super.onResume();
    if(didLanguageChange)
      recreate();
}

Problem solved. Activity A will call onResume() since it has switched into a paused state when Activity B came into the foreground.