半径为top bottom的Android ListView

Question

当我滚动ListView时，任何人都知道如何使半径始终显示在顶部？

我正在使用BaseAdapter来实现第一个＆amp;最后一项背景。

这是适配器代码，

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if(this.dataset != null && !this.dataset.isEmpty() && this.dataset.size() > 0){
        if(convertView == null){
            convertView = inflater.inflate(R.layout.corner_list_item_layout, null);
        }

        ViewHolder holder = (ViewHolder) convertView.getTag();
        if(holder == null){
            holder = new ViewHolder();  
            holder.item = (RelativeLayout) convertView.findViewById(R.id.corner_list_item_relativelayout);
            holder.label = (TextView) convertView.findViewById(R.id.corner_list_item_label);
            convertView.setTag(holder);
        }           

        if (position == 0) {
            if (position == (this.getCount() - 1)) {
                holder.item.setBackgroundResource(R.drawable.app_list_corner_round_light);
            } else {
                holder.item.setBackgroundResource(R.drawable.app_list_corner_round_top_dark);
            }
        } else if (position == (this.getCount() - 1)) {
            if(position % 2 == 0){
                holder.item.setBackgroundResource(R.drawable.app_list_corner_round_bottom_dark);
            }else{
                holder.item.setBackgroundResource(R.drawable.app_list_corner_round_bottom_light);
            }

        } else {
            if(position % 2 == 0){
                holder.item.setBackgroundResource(R.drawable.app_list_corner_middle_dark);
            }else{
                holder.item.setBackgroundResource(R.drawable.app_list_corner_middle_light);
            }
        }

        String str = String.valueOf(this.dataset.get(position));        
        holder.label.setText(str);

    }
    return convertView;
}`

Answer 1

1. 将ListView放在任何布局中。
2. 准备9张边框图像，并将其作为背景布局。