Question

我从主要活动中调用片段：

<fragment
        android:name="com.example.project.AdExample"
        android:id="@+id/button_fragment"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        tools:layout="@layout/ad_example"/>

AdExample.java 源代码：

public class AdExample extends Fragment {

    private ListView listView;

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

        // getting access to layout
        View view = inflater.inflate(R.layout.ad_example, container, false);
        listView = (ListView) view.findViewById(R.id.listView);

        MovieAdapter adapter = new MovieAdapter(getActivity(), initData());

        listView.setAdapter(adapter);

        return view;
    }

    private List<MovieItem> initData () {
        List<MovieItem> list = new ArrayList<MovieItem>();

        list.add(new MovieItem("Item1", "Desc1", 2014));
        list.add(new MovieItem("Item2", "Desc2", 2014));
        list.add(new MovieItem("Item3", "Desc3", 2014));

        return list;
    }
}

但结果我得到一个空白的ListView。我在上面的代码中遗漏了什么吗？

感谢。

UPD：

这是 MovieAdapter.java 源代码：

public class MovieAdapter extends BaseAdapter {

    private List<MovieItem> list;
    private LayoutInflater layoutInflater;

    public MovieAdapter(Context context, List<MovieItem> list) {
        this.list = list;
        layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }


    @Override
    public int getCount() {
        return 0;
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        if (view == null) {
            view = layoutInflater.inflate(R.layout.movie_item, parent, false);
        }

        TextView name = (TextView) view.findViewById(R.id.nameText);
        name.setText(getMovieItem(position).getName());

        return view;
    }

    private MovieItem getMovieItem(int position ) {
        return (MovieItem) getItem(position);
    }
}

Answer 1

您的获取计数返回0.
做：

@Override
public int getCount() {
    return list.size();
}

片段中未生成ListView

1 个答案: