如何用自定义适配器填充 ListView？列表视图为空（

Question

我有用于列表视图的自定义适配器。程序正常运行，但列表视图为空。

我的适配器看起来像：

public class CustomAdapter extends BaseAdapter implements Filterable {

private ArrayList<OItem> _data;
Context _c;

public CustomAdapter(ArrayList<OItem> data, Context c) {
    _data = data;
    _c = c;
}

public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    if (v == null)
    {
       LayoutInflater vi = (LayoutInflater)_c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       v = vi.inflate(R.layout.item, null);
    }

    OItem oItem = _data.get(position);

    TextView tvId = (TextView)v.findViewById(R.id.id);
    TextView tvName = (TextView)v.findViewById(R.id.name);
    TextView tvBatch = (TextView)v.findViewById(R.id.batch);

    tvId.setText(oItem.getId());
    tvName.setText(oItem.getName());
    tvBatch.setText(oItem.getBatch());

   return v;
}
}

活动中：

ArrayList<OItem> arrItems = new ArrayList<OItem>();
....
here I fill arrItens with the data
....
ListView lvSimple = (ListView) findViewById(R.id.lvContent);
lvSimple.setAdapter(new CustomAdapter(arrItems, this));

可能是什么问题？ 也许应该在适配器的 getView 方法中添加一些东西？

谢谢

Answer 1

我假设您尚未实现 getCount，请将其添加到您的 CustomAdapter 中

   public int getCount() {
    return null == _data ? 0 : _data.size();
}