自定义适配器要重写4个方法:
//返回数量 public int getCount() { return list.size(); } //返回position处的内容 public Object getItem(int position) { return list.get(position); } //返回position处的索引 public long getItemId(int position) { return position; } //返回具体布局 public View getView(int position, View convertView, ViewGroup parent) { return convertView; }