我正在尝试使用该方法
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new MappingPage();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
我编写了一个名为 MappingPage() 的类，如果我尝试使用上述方法，我创建的片段是 MappingPage 类型，因为已扩展，因此在函数返回片段（不是 MappingPage 对象）时抛出错误
编辑：当我这样做时出现错误
Fragment fragment = new MappingPage();
Eclipse 告诉我需要将 fragment 更改为 MappingPage 类型，这意味着我必须更改函数的返回类型
两个问题 1）你应该如何把你的自定义片段放进去？
2) 为什么 dummySectionFrament 返回的是 Fragment 对象而不是 DummySectionFragment 对象？
提前致谢
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy,
container, false);
TextView dummyTextView = (TextView) rootView
.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(
ARG_SECTION_NUMBER)));
return rootView;
}
}
这是我的课
public class MappingPage extends Fragment
{
private MapView map;
private MapController myMapController;
public static final String ARG_SECTION_NUMBER = "1";
public MappingPage() {
}
public View onCreateView (LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Context context = new ContextThemeWrapper(getActivity(), R.style.fragment_theme);
//LayoutInflater Inflater = inflater.cloneInContext(context);
View view=inflater.inflate(R.layout.fragment_main_dummy, container, false);
return view;
}
@Override
public void onResume() {
map = (MapView)getActivity().findViewById(R.id.openmapview);
map.setBuiltInZoomControls(true);
myMapController = map.getController();
myMapController.setZoom(15);
super.onResume();
}
}