Q:

Android added Fragment to screen, but taps fall through new Fragment view to the previous one

I'm working with Fragments for the first time and running into a weird behavior. I have an activity with a Fragment covering the entire view. It contains a ListView. When I tap on an item in the ListView, I want to show a details fragment which contains information about that item.
This is how I'm presenting the new fragment view:
FragmentManager fragmentManager = this.getActivity().getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();

DetailsFragment fragment = new DetailsFragment();
transaction.add(R.id.viewRoot, fragment).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                .addToBackStack("Details").commit();

R.id.viewRoot is the id of the root layout in the first Fragment's layout xml, so the new Fragment fills the entire screen.
My Problem: When the new fragment is visible and covering the entire screen, any clicks or taps which land on the background (i.e. not hitting a button or textfield on the new fragment) appear to be going through the view and landing on the first fragment. So, I tap on a ListView item, which causes the DetailsFragment to get added to the screen. Then when I tap on the background of the DetailsFragment, that tap falls through and lands on the ListView causing another DetailsFragment to be added for whatever item I happened to hit behind the scenes.
Am I adding my new fragment incorrectly? Why are my clicks/taps falling through?
EDIT for caiuspb:
public class BaseFragment extends Fragment {

    public void pushNewFragment(Fragment fragment, String description) {
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();

        transaction.remove(this);
        transaction.add(R.id.viewRoot, fragment).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                        .addToBackStack(description).commit();
    }

}

All of my fragments extend my BaseFragment class.

A:

I experimented with the suggestions I received, but none of them worked. In the end, my solution was to add an OnTouchListener to the root view of my subfragments which discarded all touches.
View view = inflater.inflate(R.layout.mylayout, container, false);
view.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return true;
    }
});

