Replace the top fragment on the back stack

Question

I'm having so much trouble with Android fragments... Suppose my back stack looks like this

[C]
[B]
[A]
---

Pressing the back button would pop Fragment C off, and leaving Fragment B on the top of the stack. Now, how do I swap Fragment C for Fragment D while maintaining the back stack? Note, Fragment B cannot be seen during the operation.

[C] <- [D]               [D]
[B]            ----->    [B]
[A]                      [A]
---                      ---

This way, pressing the back button would pop Fragment D off, and leaving Fragment B on top. Fragment C is completely removed off the stack.

I add each fragments to the stack like so

FragmentTransaction ft = manager.beginTransaction();
ft.replace(id, instance, getTag(instance));
ft.addToBackStack(getTag(instance));
ft.commit();

I thought this could be achieved by doing the same calls without addToBackStack, but it just made Fragment D and Fragment B overlapped.

Answer 1

Did you try to pop the back stack before you add fragment D:

FragmentManager fragmentManager = getFragmentManager();
fragmentManager.popBackStack(); // or popBackStackImmediate();
ft.addToBackStack(<fragmentD>);