In Fragment on back button pressed Activity is blank

Question

I have an Activity and many fragments inflated in same FrameLayout

Answer 1

Sorry for the late response.

You don't have to add ft.addToBackStack(null); while adding first fragment.

FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_frame, profileFragment);
// ft.addToBackStack(null); --remove this line.
ft.commit();
// ... rest of code