Android:如何从碎片切换到主活动？

public class MyFragment extends Fragment {
    private OnFragmentInteractionListener mListener;

    // ...

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    // ...

    private void switchToMainActivity() {
        // 调用接口方法，通知主活动切换
        mListener.onSwitchToMainActivity();
    }

    // ...
}

public class MainActivity extends AppCompatActivity implements OnFragmentInteractionListener {

    // ...

    @Override
    public void onSwitchToMainActivity() {
        // 处理从碎片切换到主活动的逻辑
        // 可以更新UI或执行其他操作
    }

    // ...
}