Localization for Russian in Android

My application supports 4 languages. The user select their language. But this is not working for Russian.

if (dil.equals("eng")){
        Configuration c = new Configuration(context.getResources().getConfiguration());
        c.locale = Locale.ENGLISH;
        context.getResources().updateConfiguration(c,context.getResources().getDisplayMetrics());
        
    }
    else if (dil.equals("ger")){
        Configuration c = new Configuration(context.getResources().getConfiguration());
        c.locale = Locale.GERMAN;
        context.getResources().updateConfiguration(c,context.getResources().getDisplayMetrics());
        
    }
    else if (dil.equals("rus")){
        Configuration c = new Configuration(context.getResources().getConfiguration());
        c.locale = Locale.????????;
        context.getResources().updateConfiguration(c,context.getResources().getDisplayMetrics());
        
    }
    else
    {
        Configuration c = new Configuration(context.getResources().getConfiguration());
        c.locale = Locale.getDefault();
        context.getResources().updateConfiguration(c,context.getResources().getDisplayMetrics());
        
    }

I don't know what to do for Russian.

c.locale = Locale.????????;