java - Fragment 中的自定义 listView。未找到布局

Question

我在 Fragment 中有一个 listView 并且工作正常。现在我正在尝试做一个自定义 listView 但我找不到。simple_list_item_1 工作正常，但列表项不起作用。

    @Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);

        ListView mListView = (ListView)getActivity().findViewById(R.id.list);
        //mArrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, android.R.id.text1, songs);
        mArrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.list_item, android.R.id.text1, songs);
        mListView.setAdapter(mArrayAdapter);

}

错误

error: cannot find symbol
    mArrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.list_item, android.R.id.text1, songs);
                                                                           ^

符号:变量list_item

Answer 1

try this if there is no crash and your list view in not creating,

重写onViewCreated()并在其中声明listview并使用view而不是getActivity()像这样

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

和

 mArrayAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.list_item, android.R.id.text1, songs);

将代码复制并粘贴到此处

  @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        ListView mListView = (ListView)view.findViewById(R.id.list);
        //mArrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, android.R.id.text1, songs);
        mArrayAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.list_item, android.R.id.text1, songs);
        mListView.setAdapter(mArrayAdapter);
    }