Question

我试图通过单击ListView中的项目来转到另一个片段（从AirportPostFragment到FinishPostFragment）。为什么这不起作用？

（getActivity（））用红色加下划线。

错误：（61,66）错误：类FinishPostFragment中的构造函数FinishPostFragment无法应用于给定类型; 必需：没有参数发现：活动原因：实际和正式的参数列表长度不同

代码：

public class AirportPostFragment extends Fragment {

String stringsList[];
ArrayAdapter<String> adapter;
private ListView listViewAirports;
private EditText editSearch;
Context mycontext;
XmlPullParser parser;
HashSet airport_list;
HashSet<String> list = new HashSet<>();
HashSet<String> newList = new HashSet<>();

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_airportpost, container, false);

    listViewAirports = (ListView) rootView.findViewById(R.id.listView_airports);
    editSearch = (EditText) rootView.findViewById(R.id.search_airport);
    adapter = new ArrayAdapter<>(getActivity(),android.R.layout.simple_list_item_1, stringsList);

    listViewAirports.setAdapter(adapter);


    listViewAirports.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                                long id) {
            FragmentManager fm = getActivity().getFragmentManager();
            fm.beginTransaction().replace(R.id.content_main, new FinishPostFragment(getActivity())).commit();
        }
    });




    searchAirport();

    return rootView;
}

这是我的FinishPostFragment代码：

public class FinishPostFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_finishpost, container, false);

        return rootView;
    }
}

这是我的FinishPostFragment代码：

public class FinishPostFragment extends Fragment {

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_finishpost, container, false);

    return rootView;
}

}

Answer 1

看起来问题是你没有FinishPostFragment的构造函数来获取Activity。由于您始终可以在片段中使用getActivity()，因此无需在构造函数中将其传递给Activity。

您可以将其更改为：

fm.beginTransaction().replace(R.id.content_main, new FinishPostFragment()).commit();

如何通过单击ListView中的项目来转到另一个片段？

1 个答案: