RecyclerView 中的复选框选择重复 [英] Duplication in Checkbox selection in RecyclerView

问题描述

下面是我的代码.

holder.followDiseaseCheckBox.setOnClickListener(new View.OnClickListener() {
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        @Override
        public void onClick(View view) {

            if (holder.followDiseaseCheckBox.isChecked()) {

                holder.followDiseaseCheckBox.setChecked(true);

                checkBoxClicked++;
                holder.followDiseaseCheckBox.setChecked(true);
                // for Follow.
                if (isFollowOrUnFollow.equals("FOLLOW")) {

                    ((FollowActivity) context).diseaseListFromAdapter.add(String.valueOf(diseaseMap.get("id")));
                    ((FollowActivity) context).setFollowButton(true);

                }
                // for Unfollow.
                else if (isFollowOrUnFollow.equals("UN_FOLLOW")) {

                    ((FollowTwoActivity) context).unFollowedDiseaseListFromAdapter.add(String.valueOf(diseaseMap.get("id")));
                    ((FollowTwoActivity) context).setUnFollowDiseaseButton(true);
                }


            } else {

                holder.followDiseaseCheckBox.setChecked(false);

                checkBoxClicked--;
                holder.followDiseaseCheckBox.setChecked(false);
                // for Follow.
                if (isFollowOrUnFollow.equals("FOLLOW")) {
                    ((FollowActivity) context).diseaseListFromAdapter.remove(String.valueOf(diseaseMap.get("id")));
                }
                // for Unfollow.
                else if (isFollowOrUnFollow.equals("UN_FOLLOW")) {
                    ((FollowTwoActivity) context).unFollowedDiseaseListFromAdapter.remove(String.valueOf(diseaseMap.get("id")));
                }

                if (checkBoxClicked == 0) {

                    // for Follow.
                    if (isFollowOrUnFollow.equals("FOLLOW")) {
                        ((FollowActivity) context).setFollowButton(false);
                        ((FollowActivity) context).diseaseListFromAdapter.clear();
                    }
                    // for Unfollow.
                    else if (isFollowOrUnFollow.equals("UN_FOLLOW")) {

                        ((FollowTwoActivity) context).setUnFollowDiseaseButton(false);
                        ((FollowTwoActivity) context).unFollowedDiseaseListFromAdapter.clear();
                    }
                }
            }

        }
    });

问题 是当我选择一个 checkBox 包括 checkBox 其他一些 checkBox 在 RecyclerView 被检查.但是，当我签入 adapter 项目时，已正确添加但 checkBox 选择被重复.

Problem is When I select a checkBox including that checkBox some other checkBox in the RecyclerView gets checked. But when I check in adapter item got added properly but checkBox selection are getting duplicated.

例如:如果我检查了第一项 checkBox 并向下滚动第 16 项 checkBox 也将被选中.取消选中 checkBox 也会取消选中第一项.

Ex: If I checked first item checkBox and scroll down 16th items checkBox will also be checked. Unchecking that checkBox will uncheck the first item as well.

推荐答案

回收器视图回收 OnBindViewHolder 中的视图.因此，当单击项目时，它会反映在其他一些位置.创建一个全局 SparseBooleanArray 来存储点击位置.

The recycler view recycles the view in OnBindViewHolder. So when items are clicked it gets reflected in some other positions. To create a global SparseBooleanArray to store the clicked position.

private final SparseBooleanArray array=new SparseBooleanArray();

然后在最终视图中添加 clickListener 和 onClick 存储被点击项目的位置.

Then inside final viewholder add the clickListener and onClick store the position of the clicked item.

public class ViewHolder extends RecyclerView.ViewHolder {
    public YOURVIEW view;
    public ViewHolder(View v) {
        super(v);
        view = (YOURVIEW) v.findViewById(R.id.YOURVIEWID);
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                array.put(getAdapterPosition(),true);
                notifyDataSetChanged();
            }
        });
    }
}

在 OnBindViewHolder 内部，

And in inside OnBindViewHolder,

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    if(array.get(position)){
        holder.followDiseaseCheckBox.setChecked(true);
    }else{
        holder.followDiseaseCheckBox.setChecked(false);
    }
}

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