如果在水平回收视图中，则不检测不可见的项目值

Question

我有我的滚动视图项目，从周日到周六水平，带有复选框，在移动视图中，如果我滚动，它显示周日到周六，如果不滚动，它显示周日到周三，

当我更新我的订阅时，它需要从星期日到星期三的值，剩余的值不会出现它们作为空值出现我该怎么办？

这是我的 adapterclass 代码：

public class SubscriptionRecyclerViewAdapter extends RecyclerView.Adapter<SubscriptionRecyclerViewAdapter.MyViewHolder> {

private List<DaysOfDelivery> daysOfDeliveryList;
 public static String[] daylist;


public class MyViewHolder extends RecyclerView.ViewHolder {
    CheckBox checkBox;
    TextView textViewPrice;

    public MyViewHolder(View view) {
        super(view);
        checkBox = (CheckBox) view.findViewById(R.id.deliveryname_checkbox);
        textViewPrice = (TextView) view.findViewById(R.id.period_price);
    }
}


public SubscriptionRecyclerViewAdapter(List<DaysOfDelivery> daysDeliveryList) {
    this.daysOfDeliveryList = daysDeliveryList;
    daylist = new String[daysOfDeliveryList.size()];

}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.horizontal_listview_availability, parent, false);

    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    DaysOfDelivery days = daysOfDeliveryList.get(position);
    holder.checkBox.setText(days.getAvailabilityDays());
    holder.checkBox.setChecked(days.getCheckbox());
    holder.textViewPrice.setText(days.getPrice());
    if (days.getCheckbox())
        daylist[position]="1";
    else
        daylist[position]="0";

}

@Override
public int getItemCount() {
    return daysOfDeliveryList.size();
}

}

和我的 activity class 更新功能：

update1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String[] days= SubscriptionRecyclerViewAdapter.daylist;

            if(isConnected)
                new EditSubscription().execute();
            else
                Toast.makeText(Subscription.this, "No Internet Connection", Toast.LENGTH_LONG).show();
        }
    });

这几天我只得到星期天到星期三的值，剩下的不会来

Answer 1

在您的 activity/fragment 中维护 daylist 数组，当您想从适配器更新该列表时使用回调进行更新。

在屏幕中不可见的 recyclerView 视图，在进入屏幕之前不会被初始化。

或者在构造函数中也初始化该列表：

public SubscriptionRecyclerViewAdapter(List<DaysOfDelivery> daysDeliveryList) {
    this.daysOfDeliveryList = daysDeliveryList;
    daylist = new String[daysOfDeliveryList.size()];

    for (int i = 0; i < daysDeliveryList.size(); i++) {
        daylist[i] = daysDeliveryList.get(i).getCheckbox() ? "1" : "0";
    }

}

如果在水平回收视图中，则不检测不可见的项目值

Not detecting invisible item values if it is in horizontalrecyclerview

android

horizontal-recyclerview