how to get a fragment added in an XML layout

Question

I have a layout which includes a fragment as follows:

Answer 1

If the fragment is embedded in another fragment, you need getChildFragmentManager() but not getFragmentManager(). For example, in layout xml define the fragment like this:

in Code, you can get the fragment instance like this:

FragmentManager f = getChildFragmentManager();
FragmentTransaction transaction = f.beginTransaction();
chatFragment = f.findFragmentById(R.id.chatfragment);

if (chatFragment != null) {
   transaction.hide(chatFragment);
}
transaction.commit();