使用填充重新定位ListView的滚动条

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;
    if (convertView == null) {
        convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
        viewHolder = new ViewHolder(convertView);
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

    // 添加填充
    int paddingTop = position == 0 ? 100 : 0; // 第一个item添加100dp的填充
    int paddingBottom = position == getCount() - 1 ? 100 : 0; // 最后一个item添加100dp的填充
    convertView.setPadding(0, paddingTop, 0, paddingBottom);

    // 绑定数据
    viewHolder.bindData(getItem(position));

    return convertView;
}

    android:id="@+id/list_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical" />

    android:id="@+id/list_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical"
    android:scrollbarThumbVertical="@drawable/scrollbar_thumb_vertical"
    android:scrollbarSize="10dp" />

    <solid android:color="#FF0000" />
    <corners android:radius="5dp" />
</shape>