android - How to replace the activity's fragment from the fragment itself?

Question

My application has a Fragment inside its Activity. I would like to programmatically replace the fragment by another one from the current fragment itself.

For example, if I click on a button inside the fragment, the fragment should be replaced with another one, but the activity should remain the same.

Is it possible? If so, how to do it?

Answer 1

from the official docs:

// Create new fragment and transaction
Fragment newFragment = new ExampleFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();

// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);

// Commit the transaction
transaction.commit();

In this example, newFragment replaces whatever fragment (if any) is currently in the layout container identified by the R.id.fragment_container ID. By calling addToBackStack(), the replaced fragment is saved to the back stack so the user can reverse the transaction and bring back the previous fragment by pressing the Back button.

The behavior you have described is exactly what fragments are designed to do. Please go through the official guide for a thorough understanding of fragments which will clear up all your questions.

http://developer.android.com/guide/components/fragments.html