在活动xml或newInstance()工厂方法中声明Android片段？

<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 {
    // 构造函数
    public MyFragment() {
        // Required empty public constructor
    }

    // 静态的newInstance()方法
    public static MyFragment newInstance(String param1, String param2) {
        MyFragment fragment = new MyFragment();
        Bundle args = new Bundle();
        args.putString("param1", param1);
        args.putString("param2", param2);
        fragment.setArguments(args);
        return fragment;
    }

    // 其他片段代码...
}

MyFragment fragment = MyFragment.newInstance("Hello", "World");
getSupportFragmentManager().beginTransaction()
    .add(R.id.fragment_container, fragment)
    .commit();