我正在尝试构建一个包含行的自定义视图的列表,每行包含一个图像视图和两个文本视图.

为了做到这一点,我扩展了ArrayAdapter类(称为PostersArrayAdapter)并重写了getView()方法,以便在数据和行布局之间建立正确的连接.

但是,当我尝试使用一些PosterData类(我的实现)构造一个带有一些数据的PostersArrayAdapter时,结果是适配器为空,意味着getCount()返回零并且listView为空.

任何人都可以建议我做错了什么？
我依赖于我在这里找到的代码 – http://www.vogella.de/articles/AndroidListView/article.html

非常感谢你！

这里是相关的代码:( PosterData类只是一个有两个字符串字段的类)

public class PostersListActivity extends ListActivity {
final private int NUM_OF_PICS = 2;
private ContentGetter   cg;
private PosterData[]    posters;
private ListView        listView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    cg = new ContentGetter(NUM_OF_PICS);
    try 
    {
        posters = cg.parseIndexFile();
        int res = cg.DownloadPosterPics(1);

    } 
    catch (ClientProtocolException e) 
    {
        e.printStackTrace();
    } 
    catch (IOException e) 
    {
        e.printStackTrace();
    }

    // Use our own list adapter
    listView = (ListView)findViewById(android.R.id.list);
    //listView.setAdapter((ListAdapter) new ArrayAdapterlogo;
        public TextView  title;
        public TextView  names;
    }

    @Override
    public View getView(int position,View convertView,ViewGroup parent) {
        // ViewHolder will buffer the assess to the individual fields of the row
        // layout

        ViewHolder holder;
        // Recycle existing view if passed as parameter
        // This will save memory and time on Android
        // This only works if the base layout for all classes are the same
        View rowView = convertView;
        if (rowView == null) 
        {
            LayoutInflater inflater = context.getLayoutInflater();
            rowView = inflater.inflate(R.layout.list_item,null,true);
            holder = new ViewHolder();
            holder.title = (TextView) rowView.findViewById(R.id.title);
            holder.names = (TextView) rowView.findViewById(R.id.names);
            holder.logo = (ImageView) rowView.findViewById(R.id.logo);
            rowView.setTag(holder);
        } 
        else 
        {
            holder = (ViewHolder) rowView.getTag();
        }

        holder.title.setText(posters[position].getTitle());
        holder.names.setText(posters[position].getNames());
        holder.logo.setImageResource(R.drawable.icon);

        return rowView;
    }
}   
}

这是我正在使用的列表视图布局：

logo" 
            android:src="@drawable/icon" 
            android:layout_height="wrap_content"            
            android:layout_width="22px"
            android:layout_marginTop="4px" 
            android:layout_marginRight="4px"
            android:layout_marginLeft="4px">