Question

我需要一些帮助，在event_filter.xml中定义我声明的Views。它是AbstractDetailListFragment的子项，并实现DatePicker和Spinner项。但我不知道如何在AbstractDetailFragment中访问它们。通过定义

  @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View theView = super.onCreateView(inflater, container, savedInstanceState);
    ImageButton searchEnterButton = (ImageButton)getNavigationFragment().getNavigationBar().getRightButton();
    View view = getView();
    final DatePicker datePicker = (DatePicker) container.findViewById(R.id.datePickerEvent);
    Spinner inSpinner = (Spinner) container.findViewById(R.id.category_list);
    spinner = inSpinner;
    downloadCategories();

变量视图，datePicker，inSpinner始终为null！

任何想法？非常感谢。

Answer 1

这是关于碎片的事情。我好几天都在寻找相同的错误，直到我读了一些片段（我很懒，我建议你不要跟随我的脚步）。我解决它的方法是重写onViewCreated和＆＃34;捕捉＆＃34;在那里观看：

 public class MyFragment extends Fragment {
    View rootView;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        rootView = inflater.inflate(R.layout.my_fragment, container,
                false);
        return rootView;

    }

//and you use rootView to call findViewById
    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        Button myButton = (Button) rootView.findViewById(R.id.mybutton);
        sendFeedback.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //do something
            }
        });
    }

}

检测正确的视图

1 个答案: