Question

我正在尝试为listView创建自定义适配器。这是我的CustomAdapter课程 -

public class CustomAdapter extends ArrayAdapter<Custom>{
private ArrayList<Custom> entries;
private Activity activity;
private int height;

public CustomAdapter(int hei, Activity a, int textViewResourceId, ArrayList<Custom> entries) {
    super(a, textViewResourceId, entries);
    this.entries = entries;
    this.activity = a;
    this.height=hei;
}

public static class ViewHolder{
    public TextView item1;
    public ImageView image;

}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    ViewHolder holder;
    if (v == null) {
        LayoutInflater vi =
            (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.review_list_m, null);
        v.setMinimumHeight(height);
        holder = new ViewHolder();
        holder.item1 = (TextView) v.findViewById(R.id.name);
        holder.image = (ImageView) v.findViewById(R.id.posterView);
        v.setTag(holder);
    }
    else
        holder=(ViewHolder)v.getTag();

    final Custom custom = entries.get(position);
    if (custom != null) {
        String imgUrl=custom.getImage();
        Log.v("PATH",custom.getcustomBig()); 
        holder.item1.setText(custom.getcustomBig());

    }
    return v;
 }

}

然后我在customclass中只输入了两个值但以下行登录6次

Log.v("PATH",custom.getcustomBig());

如下所示

01-09 11:49:34.683: V/PATH(12629): Name 1
01-09 11:49:34.683: V/PATH(12629): Name 2
01-09 11:49:34.683: V/PATH(12629): Name 1
01-09 11:49:34.683: V/PATH(12629): Name 2
01-09 11:49:34.683: V/PATH(12629): Name 1
01-09 11:49:34.683: V/PATH(12629): Name 2

但是在listView中只显示了2个条目。

有什么奇怪的吗？因为我需要在listView上实现下载图像脚本。在那种情况下，该图像会被下载超过1次吗？

Answer 1

尝试以下代码:(不要将custom设为最终版，不要检查null）

    Custom custom = entries.get(position);
    String imgUrl=custom.getImage();
    Log.v("PATH",custom.getcustomBig()); 
    holder.item1.setText(custom.getcustomBig());

Answer 2

请查看您传递给构造函数的条目列表。将为条目列表中的项目数调用getView（）。您的条目列表可能包含6个值。

Android自定义适配器listView循环更多

2 个答案: