Question

我有切换视图的动态添加权限列表。在onBindViewHolder中我使用setOnCheckedChangeListener分别更新每个开关的已检查状态，但是当我离开适配器时，开关状态都被重置为未选中。

这是我的onCreateViewHolder和onBindViewHolder

@Override
public PermisssionViewHolder onCreateViewHolder(final ViewGroup parent, int viewType) {

    //Inflate view
    View view = LayoutInflater.from(RjioSettingsApplication.get()).inflate(R.layout.permission_info_layout, parent, false);
    final PermisssionViewHolder holder = new PermisssionViewHolder(view);

    holder.getRootView().setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (clickListener != null) {
                clickListener.onItemClicked(holder.getAdapterPosition());

                if (holder.getPermissisonSwitch().isChecked()) {
                    holder.getPermissisonSwitch().setChecked(false);
                } else {
                    holder.getPermissisonSwitch().setChecked(true);
                }
            }
        }
    });

    return holder;
}

@Override
public void onBindViewHolder(final PermisssionViewHolder holder, final int position) {
    super.onBindViewHolder(holder, position);
    final PermisssionItem permission = items.get(position);

    //Permission switch view
    holder.getPermissisonSwitch().setOnCheckedChangeListener(null);
    holder.getPermissisonSwitch().setChecked(items.get(position).isPermissionChecked());
    holder.getPermissisonSwitch().setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            if (isChecked) {
                items.get(position).setPermissionChecked(true);
            } else {
                items.get(position).setPermissionChecked(false);
            }

            System.out.println("################## IS CHECKED " + isChecked);
            notifyDataSetChanged();
        }
    });

    //Permission title
    holder.getTitle().setText(permission.getPermission());
}

Answer 1

在数据列表模型中创建变量 boolean 。

     private boolean isChecked;

     public boolean isChecked() {
            return isChecked;
        }
     public void setChecked(boolean checked) {
            isChecked = checked;
        }

然后将 RecyclerView 中的项目检查为

VHitem.checkIndividual.setOnCheckedChangeListener((compoundButton, checked) -> {
                        if (!onBind) {
                            selectIndividualCheckBox(checked, holder.getAdapterPosition());
                        }
                    });

private void selectIndividualCheckBox(boolean isChecked, int position) {
            Model model = model.get(position);
            model.setChecked(isChecked);
            notifyDataSetChanged();
        }

Android在recycler adaper中保存多个开关状态

1 个答案: