android - 非法参数异常 : No view found for id for fragment when trying to setView

Question

它说 IllegalArgumentException:当我尝试设置 View 时，找不到 fragment ID 的 View 。我知道问题出在第 3 行和第 4 行。它的News.java文件news是一个 fragment 。

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getActivity().setContentView(R.layout.fragment_news);
        listView = (ListView) getActivity().findViewById(R.id.list);

        feedItems = new ArrayList<FeedItem>();

        listAdapter = new FeedListAdapter(this, feedItems);
        listView.setAdapter(listAdapter);

Answer 1

Fragment.java 文件如下代码所示:

@Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view =  inflater.inflate(R.layout.fragment_news, container, false);
        //ButterKnife.bind(this, view);

       init(view);

        return view;
    }

之后在 init 方法中输入以下代码:

private void init(View view){

listView = (ListView) view.findViewById(R.id.list);

    feedItems = new ArrayList<FeedItem>();

    listAdapter = new FeedListAdapter(this, feedItems);
    listView.setAdapter(listAdapter);
    }

你也不要忘记extends Fragment