Pass data between fragments

Question

I want to transfer the user ID from the main Activity to a fragment.

So in the main activity, I do:

 Fragment fragment = new Fragment();
 final Bund         


        

Answer 1

You can use:

 Bundle args = getArguments();
 if (args  != null && args.containsKey("id_User"))
     String userId = args.getString("id_User");

Answer 2

Just use:

String User = getArguments().getString("id_User", "Default Value");

The default value you supply will be returned if the key you request does not exist.