需求:

• list集合保存的对象中保存一个字段:

  • isTitle:boolean类型,区别对象的种类,根据标记,加载不同布局

• 代码:

    class MyAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return list.size();
        }
        @Override
        public AppInfo getItem(int position) {
            return list.get(position);
        }
        @Override
        public long getItemId(int position) {
            return position;
        }
        //重点!!!
        @Override
        public int getViewTypeCount() {
            return 2;
        }
        //重点!!!
        @Override
        public int getItemViewType(int position) {
            AppInfo info = list.get(position);        //获取每个条目的显示对象,返回每个条目的标志位
            if (info.isTitle) {
                return TYPE_TITLE;
            } else {
                return TYPE_NORMAL;
            }
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (getItemViewType(position) == TYPE_NORMAL) {
                ViewHolder holder;
                if (convertView == null) {     //加载一般布局
                    convertView = View.inflate(getApplicationContext(), R.layout.app_info_item, null);
                    holder = new ViewHolder(convertView);
                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }
                AppInfo info = getItem(position);
                holder.tvName.setText(info.name);
                holder.ivIcon.setImageDrawable(info.icon);
                holder.tvSize.setText(Formatter.formatFileSize(getApplicationContext(), info.size));
                holder.tvLocation.setText(info.isSdcard ? "外置存储卡" : "手机内存");
            } else {         //加载标题布局
                TextView tvTitle = null;
                if (convertView == null) {
                    convertView = View.inflate(getApplicationContext(), R.layout.app_title_item, null);
                }
                tvTitle = (TextView) convertView.findViewById(R.id.title_item);
                AppInfo info = getItem(position);
                if (position == 0) {
                    tvTitle.setText(info.title + "(" + userList.size() + ")");
                } else {
                    tvTitle.setText(info.title + "(" + systemList.size() + ")");
                }
            }
            return convertView;
        }
    }
  
    static class ViewHolder {
        @BindView(R.id.iv_icon)
        ImageView ivIcon;
        @BindView(R.id.tv_name)
        TextView tvName;
        @BindView(R.id.tv_location)
        TextView tvLocation;
        @BindView(R.id.tv_size)
        TextView tvSize;
  
        ViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }
  

• 加个多个不同布局时候,需要重写getItemViewType方法,根据返回值int类型,判断加载布局的类型

• 需要重写getViewTypeCount,返回值为填充布局种类的个数

• 自定义标志要从0开始

    private static final int TYPE_TITLE = 0; //标题栏类型
    private static final int TYPE_NORMAL = 1; //一般布局