java - 我需要扩展到fragment 还需要listactivity

Question

Android 工作室。所以基本上我的 MainActivity 我有 NavigationDrawer，我用它来转到 fragment 。当我打开这个 fragment 时，我需要它来显示 ListView 。问题是为了让 listview 工作，我需要扩展到 listactivity，但是为了从菜单打开 fragment ，我需要扩展到 Fragment。该怎么办？

这是我的 MainActivity 抽屉导航

@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    Fragment fragment = null;

    if (id == R.id.nav_main) {
        // Handle the camera action
        fragment = new WebListFragment();

    } else if (id == R.id.nav_add) {

        // Handle the camera action
        fragment = new AddFragment();

    } else if (id == R.id.nav_tut) {

    }

    if (fragment != null) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

这是我的 fragment

公共(public)类 WebListFragment 扩展 Fragment{

public WebListFragment() {}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    String[] links = {"Facebook", "Twitter", "StackOverflow"};
    ArrayAdapter<String> adapter= new ArrayAdapter<String>(getListView().getContext(), android.R.layout.simple_list_item_1, links);
    getListView().setAdapter(adapter);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_web_list, container, false);
}

Answer 1

您完全不必使用ListActivity，只需像平常一样创建ListView，然后设置适配器即可。然后就可以毫无问题地扩展Fragment了

ListView lvMain = (ListView) findViewById(R.id.lvMain);
lvMain.setAdapter(adapter);