How do I add a Fragment to an Activity with a programmatically created content view

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I want to add a Fragment to an Activity that implements its layout programmatically. I looked over the Fragment documentation but there aren’t many examples describing what I need. Here is the type of code I tried to write:

public class DebugExampleTwo extends Activity {

    private ExampleTwoFragment mFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FrameLayout frame = new FrameLayout(this);
        if (savedInstanceState == null) {
            mFragment = new ExampleTwoFragment();
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.add(frame.getId(), mFragment).commit();
        }

        setContentView(frame);
    }
}

…

public class ExampleTwoFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, 
                             ViewGroup container, 
                             Bundle savedInstanceState) {
        Button button = new Button(getActivity());
        button.setText("Hello There");
        return button;
    }
}

This code compiles but crashes at start, probably because my FragmentTransaction.add() is incorrect. What is the correct way to do this?

8 Answers
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