What is the difference between FragmentManager and fragment transactions?

FragmentManager manages:

• The lifecycle of fragments.
• The back stack (Back Stack).
• Searching for fragments by id or tag.

Fragment transactions (FragmentTransaction) are used to perform operations on fragments, such as:

• Adding (add())
• Removing (remove())
• Replacing (replace())
• Showing (show())
• Hiding (hide())

Example:

// Get the FragmentManager
FragmentManager fragmentManager = getSupportFragmentManager();

// Begin a transaction
FragmentTransaction transaction = fragmentManager.beginTransaction();

// Perform an operation (e.g., replace one fragment with another)
MyFragment newFragment = new MyFragment();
transaction.replace(R.id.fragment_container, newFragment);

// Add the transaction to the back stack (optional)
transaction.addToBackStack(null);

// Commit the transaction
transaction.commit();