Android - addToBackStack() doesn't work?

Question

This is the function responsible for adding fragments to back stack:

public void populateContent(File f)
{

    ContentFragment cf = new ContentFragment(ctx, ac,         


        

Answer 1

It seems that calling addToBackStack() on fragment transaction is not enough, we have to handle the popping up of the back stack upon Back button pressed by ourselves. I added this to my activity and it worked as expected:

@Override
public void onBackPressed() {
    if (getFragmentManager().getBackStackEntryCount() > 0 ){
        getFragmentManager().popBackStack();
    } else {
        super.onBackPressed();
    }
}