Recycleview checkbox 复用出现混乱解决方法
栏目：综合技术时间：2015-04-08 08:16:37
今天在做项目的1个我的收藏页面时要实现这么1个效果：
每一个item 前面都有1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1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2种就是在获得到的bean中设置1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3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。这是由于你的item滑出可视范围时，就会触发oncheckchange事件，所以用第1步绑定的tag进行2次判断。避免选中的丢失
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，2次判断{
checkeddata.remove(baseBean);
checkPositionlist.remove(new Integer(position));
}
}
}
});完全代码，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);
}
}
------分隔线----------------------------
------分隔线----------------------------