Replace fragments in FrameLayout layout

Question

I have tried every tutorial on the first google page about android fragments, but I can\'t get anything to work.

So I have one navigation bar activity, MainAct

Answer 1

I solved it!

Apparently, I had to use android.support.v4.app.Fragment; instead of android.app.Fragment;. This is the code I got it to work with:

protected void setFragment(Fragment fragment) {
    android.support.v4.app.FragmentTransaction t = getSupportFragmentManager().beginTransaction();
    t.replace(R.id.fragment_container, fragment);
    t.commit();
}

And to set it (from the nav bar onNavigationItemSelected(), you do this:

setFragment(new RoosterFragment());

I hope this helps others out with the same frustrating problem.