How do you call the Android fragment framework?

The steps for invoking the Android fragment framework are as follows:

1. Create a subclass inherited from the Fragment class to manage and display the content of the fragment.

public class MyFragment extends Fragment {
    // ...
}

1. In Activity, you can manage and display fragments using FragmentManager. You can obtain FragmentManager by calling the getSupportFragmentManager() method.

FragmentManager fragmentManager = getSupportFragmentManager();

1. Add a Fragment container to the layout file of the Activity to display the content of the fragment.

<FrameLayout
    android:id="@+id/fragment_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

1. In the Activity, we can use FragmentTransaction to perform operations such as adding, removing, and replacing fragments.

FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

1. Use the methods of FragmentTransaction to perform the corresponding actions, such as adding a fragment to a container.

MyFragment myFragment = new MyFragment();
fragmentTransaction.add(R.id.fragment_container, myFragment);

1. Submit the transaction to make the operation take effect.

fragmentTransaction.commit();

By following the steps above, you can use the fragment framework in Android to manage and display the content of fragments.