android - getView 未在 baseAdapter 类上调用

Question

我有一个扩展 BaseAdapter 的类，我用它来为 listView 的每一行插入一个 icon 和一个 textView 在抽屉里

public class NavRightDrawerListAdapter extends BaseAdapter {

    private Context context;
    LinkedList<String> userNameUsedForListView;
    Map<String, Bitmap> urlUserImage;

    public NavRightDrawerListAdapter(Context context, LinkedList<String> userNameUsedForListView, Map<String, Bitmap> returnBitMapFromURL) {
        this.context = context;
        this.userNameUsedForListView = userNameUsedForListView;
        this.urlUserImage = returnBitMapFromURL;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        int count = 0;
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.drawer_list_of_action, null);
        }

        ImageView imgIcon = (ImageView) convertView.findViewById(R.id.icon);
        TextView txtTitle = (TextView) convertView.findViewById(R.id.title);

        imgIcon.setImageBitmap(urlUserImage.get(userNameUsedForListView.get(count)));
        txtTitle.setText(userNameUsedForListView.get(count));
        count++;
        return convertView;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }
}

在我的 Activity 中我这样做:

[...]
rightDrawerLinearLayout = (LinearLayout) findViewById(R.id.right_drawer_ll);
rightDrawerListForFollow = (ListView) findViewById(R.id.right_drawer);
NavRightDrawerListAdapter adapter = new NavRightDrawerListAdapter(getApplicationContext(), userNameUsedForListView,returnBitMapFromURL);
rightDrawerListForFollow.setAdapter(adapter);
[...]

我注意到没有调用 getView，有人可以解释为什么吗？

非常感谢。

Answer 1

在你的方法中

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return 0;
}

您将返回 0。因此您的方法未被调用。而是在 getCount 方法中返回 ListView 的大小。