我试图通过xml添加片段，并将从片段获取的数据打印到MainActivity，但是代码没有运行

<fragment
    android:name="com.example.MyFragment"
    android:id="@+id/myFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

public class MyFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_example, container, false);
        
        // 在这里进行相关操作，例如获取数据并打印到MainActivity
        String data = "Hello World";
        MainActivity mainActivity = (MainActivity) getActivity();
        mainActivity.printData(data);
        
        return view;
    }
}

public class MainActivity extends AppCompatActivity {
    // ...

    public void printData(String data) {
        Log.d("MainActivity", "Data from fragment: " + data);
    }

    // ...
}