如何在导航抽屉的片段中添加片段

// 创建一个新的片段类
public class MyFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // 创建片段的布局
        View view = inflater.inflate(R.layout.fragment_my, container, false);
        
        // 添加视图元素到布局中
        
        return view;
    }
}

// 在主活动中添加片段
public class MainActivity extends AppCompatActivity {
    private DrawerLayout drawerLayout;
    private FrameLayout fragmentContainer;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // 找到导航抽屉的布局和片段容器
        drawerLayout = findViewById(R.id.drawer_layout);
        fragmentContainer = findViewById(R.id.fragment_container);
        
        // 创建片段事务
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        
        // 创建新的片段实例
        MyFragment myFragment = new MyFragment();
        
        // 将新的片段添加到片段容器中
        fragmentTransaction.add(R.id.fragment_container, myFragment);
        
        // 提交片段事务
        fragmentTransaction.commit();
    }
}