如何从使用onNagivationItemSelected的NavigationDrawer中打开片段

NavigationView navigationView = findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        // 在这里处理导航菜单项的点击事件
        int id = item.getItemId();
        switch (id) {
            case R.id.menu_item1:
                // 打开片段1
                openFragment(new Fragment1());
                break;
            case R.id.menu_item2:
                // 打开片段2
                openFragment(new Fragment2());
                break;
            // 添加更多的菜单项和相应的打开片段的逻辑
        }
        // 关闭导航菜单
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
});

private void openFragment(Fragment fragment) {
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.replace(R.id.fragment_container, fragment);
    transaction.commit();
}

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