Recycleview checkbox 复用出现混乱解决方法

来源：互联网发布：最强大脑小度知乎编辑：程序博客网时间：2024/05/16 15:26

今天在做项目的一个我的收藏页面时要实现这么一个效果：
这里写图片描述
每个item 前面都有一个checkbox ，主要布局是recycleview 。当我们选中某项时，继续往下滑动下面某个的checkbox也会变成选中状态。
解决方法一比较暴力 viewHolder.setIsRecyclable(false);
这样viewholder就不进行复用，也不存在checkbox 混乱选中的问题了，但是你滑动的时候卡的要死。

第二种就是在获取到的bean中设置一个标志位，但是需要修改bean 。虽然只是加个字段的问题，但是不建议。

第三种就是用个辅助list记录选中的item. 这还不够，还要配合viewholder的settag（）.

1.在绑定view的时候
viewHolder.checkBox.setTag(new Integer(position));//设置tag 否则划回来时选中消失

    if (checkPositionlist != null) {        ((MyViewHolder) holder).checkBox.setChecked((checkPositionlist.contains(new Integer(position)) ? true : false));    } else {        ((MyViewHolder) holder).checkBox.setChecked(false);    }

2.选中监听事件：

 viewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                MyCollectionBaseBean baseBean = data.getFavoritesList().get(position);                if (isChecked) {                    //Log.e("fangchao 1", viewHolder.checkBox.getTag() + "");                    if (!checkPositionlist.contains(viewHolder.checkBox.getTag())) {//这句要有 ，否则不复用了，但是你再滑动回去的时候，都成了为选中。这是因为你的item滑出可视范围时，就会触发oncheckchange事件，所以用第一步绑定的tag进行二次判断。防止选中的丢失                        checkeddata.add(baseBean);                        checkPositionlist.add(new Integer(position));                    }                } else {                    //Log.e("fangchao 2", viewHolder.checkBox.getTag() + "");                    if (checkPositionlist.contains(viewHolder.checkBox.getTag()))//这句同上，二次判断{                        checkeddata.remove(baseBean);                        checkPositionlist.remove(new Integer(position));                    }                }            }        });

完整代码，自己摘着看：

/** * Created By Fangchao On 2015/3/5 */public class CollectionAdapter extends FooterAdapter {    private MyCollectionListBean data;// 元数据    private List<MyCollectionBaseBean> checkeddata = new ArrayList<>();// 选中的数据    private ImageLoader mImageLoader;    private List<Integer> checkPositionlist;    public CollectionAdapter(MyCollectionListBean data) {        this.data = data;        mImageLoader = new ImageLoader(MyApplication.getInstance()                .getRequestQueue(), BitmapCache.getInstance());        checkPositionlist = new ArrayList<>();    }    public class MyViewHolder extends RecyclerView.ViewHolder {        public TextView txt_onsale, txt_mj, txt_present, goodsname, goods_describe;        public TextView price, mark_price, commentsnums;        CheckBox checkBox;        NetworkImageView goods_img;        public View v;        public MyViewHolder(View v) {            super(v);            this.v = v;            txt_onsale = (TextView) v.findViewById(R.id.txt_onsale);            txt_mj = (TextView) v.findViewById(R.id.txt_mj);            txt_present = (TextView) v.findViewById(R.id.txt_present);            goods_describe = (TextView) v.findViewById(R.id.tv_production_describ);            goodsname = (TextView) v.findViewById(R.id.tv_goods_name);            price = (TextView) v.findViewById(R.id.tv_goods_price);            mark_price = (TextView) v.findViewById(R.id.tv_goods_markprice);            commentsnums = (TextView) v.findViewById(R.id.tv_goods_commentsnums);            checkBox = (CheckBox) v.findViewById(R.id.collection_cb);            goods_img = (NetworkImageView) v.findViewById(R.id.mycollection_item_image);        }    }    @Override    public boolean useFooter() {        return true;    }    @Override    public RecyclerView.ViewHolder onCreateContentItemViewHolder(ViewGroup parent, int viewType) {        View v = LayoutInflater.from(parent.getContext())                .inflate(R.layout.item_collection, parent, false);        MyViewHolder vh = new MyViewHolder(v);        return vh;    }    @Override    public void onBindContentItemView(RecyclerView.ViewHolder holder, final int position) {        MyViewHolder viewHolder = (MyViewHolder) holder;        // viewHolder.setIsRecyclable(false);        viewHolder.goodsname.setText(data.getFavoritesList().get(position).getGoods().getGoodsName());        if (StringUtils.isBlank(data.getFavoritesList().get(position).getGoods().getGoodsSlogan())) {            viewHolder.goods_describe.setVisibility(View.GONE);        } else {            viewHolder.goods_describe.setVisibility(View.VISIBLE);            viewHolder.goods_describe.setText(data.getFavoritesList().get(position).getGoods().getGoodsSlogan());        }        viewHolder.price.setText(PriceTools.formatStr(data.getFavoritesList().get(position).getGoods().getShopPrice()));        viewHolder.price.setTextColor(Color.parseColor("#E5004B"));        viewHolder.mark_price.setText(PriceTools.formatStr(data.getFavoritesList().get(position).getGoods().getMarketPrice()));        viewHolder.mark_price.setBackgroundResource(0);        viewHolder.mark_price.getPaint().setFlags(                Paint.STRIKE_THRU_TEXT_FLAG | Paint.ANTI_ALIAS_FLAG); // 设置中划线并加清晰        viewHolder.commentsnums.setText(data.getFavoritesList().get(position).getGoods().getCommentCount());        viewHolder.checkBox.setTag(new Integer(position));//设置tag 否则划回来时选中消失        //checkbox  复用问题        if (checkPositionlist != null) {            ((MyViewHolder) holder).checkBox.setChecked((checkPositionlist.contains(new Integer(position)) ? true : false));        } else {            ((MyViewHolder) holder).checkBox.setChecked(false);        }        //Log.e("ffff",position+"");        viewHolder.goods_img.setDefaultImageResId(R.drawable.item_default_img);        viewHolder.goods_img.setErrorImageResId(R.drawable.item_default_img_err);        viewHolder.goods_img.setImageUrl(data.getFavoritesList().get(position).getGoods().getImgFile(), mImageLoader);        if (data.getFavoritesList().get(position).getGoods().getIsOnSale().equals("false")) {            //下架            viewHolder.price.setText("本商品已经下架");            viewHolder.price.setTextColor(Color.GRAY);            viewHolder.mark_price.setText("");        } else if (data.getFavoritesList().get(position).getGoods().isIsNoStock()) {            //缺货            viewHolder.mark_price.setBackgroundResource(R.drawable.ticket_is_outof_date_bg);            viewHolder.mark_price.setText(" 缺货 ");            viewHolder.price.setTextColor(Color.GRAY);            viewHolder.mark_price.getPaint().setFlags(0);        }        //cb 的选中事件        onchecked(viewHolder, position);    }    private void onchecked(final MyViewHolder viewHolder, final int position) {        viewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                MyCollectionBaseBean baseBean = data.getFavoritesList().get(position);                if (isChecked) {                    //Log.e("fcccc 1", viewHolder.checkBox.getTag() + "");                    if (!checkPositionlist.contains(viewHolder.checkBox.getTag())) {                        checkeddata.add(baseBean);                        checkPositionlist.add(new Integer(position));                    }                } else {                    //Log.e("fcccc 2", viewHolder.checkBox.getTag() + "");                    if (checkPositionlist.contains(viewHolder.checkBox.getTag())) {                        checkeddata.remove(baseBean);                        checkPositionlist.remove(new Integer(position));                    }                }            }        });    }    @Override    public int getContentItemCount() {        if (data != null)            return data.getFavoritesList().size();        else return 0;    }    @Override    public int getContentItemType(int position) {        return 0;    }    public void getdata(MycheckListener listener) {        listener.getcheckeddata(checkeddata);    }    public interface MycheckListener {        void getcheckeddata(List<MyCollectionBaseBean> listBean);    }}

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