I have a `HomeFragment` that has a button, which when clicked calls the following:

```
Fragment frag = new CustFragment();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.home_container, frag).commit();

```

Then in my `FragmentActivity` which is the fragments mentioned above, I have:

```
@Override
public void onBackPressed() {

    getFragmentManager().popBackStack();
    super.onBackPressed();

}

```

That's what I've tried, but if I'm on the `frag` fragment and I press the back button, it doesn't go back to the last fragment (the `HomeFragment`). Instead, it attempts to go back to the last Activity, but since there is none (i.e. the previous activity had `finish()` invoked on it), it just goes to the Android Home Screen.

What am I doing wrong?

PS: If I'm being unclear, just comment below and i'll try to clarify.