RecyclerView 滚动时弄乱了数据 [英] RecyclerView messed up data when scrolling

问题描述

在向下和向上滚动后滚动 RecyclerView 时出现问题.这个想法是改变元素的颜色，但是当我向下滚动时，一切都很好，当滚动向上时 - 不应该被着色的元素正在改变颜色.

Having a problem when scrolling RecyclerView after scrolling down and up. The idea is to change elements color, but when I scroll down everything is great and when the scroll goes up - the elements, which are shouldn't be colored are changing color.

这是我的适配器:

public class NotificationsAdapter extends RecyclerView.Adapter<NotificationsAdapter.ViewHolder> {

private NotificationData notificationData;
private Context mContext;
private ArrayList<NotificationData> infromationList = new ArrayList<>();


public NotificationsAdapter(Context context, ArrayList<NotificationData> infromationList) {
    this.infromationList = infromationList;
    this.mContext = context;
}


@Override
public NotificationsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View itemLayoutView;
    ViewHolder viewHolder;

    itemLayoutView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.notification_single_item, parent, false);
    viewHolder = new ViewHolder(itemLayoutView, viewType);

    return viewHolder;
}

@Override
public void onBindViewHolder(NotificationsAdapter.ViewHolder holder, int position) {

    notificationData = infromationList.get(position);
    holder.notificationDate.setText(convertDate(notificationData.getDate()));
    holder.notificationStatus.setText(notificationData.getNotificationStatus());
    holder.orderDescription.setText(notificationData.getNotificationLabel());

    if ("true".equals(notificationData.getReadStatus())) {
        holder.root.setBackgroundColor(mContext.getResources().getColor(R.color.white));
        holder.notificationStatus.setTypeface(Typeface.create("sans-serif-light", Typeface.NORMAL));
    }

}

@Override
public int getItemCount() {
    return (null != infromationList ? infromationList.size() : 0);
}

public static class ViewHolder extends RecyclerView.ViewHolder {

    public TextView notificationDate;
    public TextView notificationStatus;
    public TextView orderDescription;
    public LinearLayout root;

    public ViewHolder(View itemView, int position) {
        super(itemView);

        notificationDate = (TextView) itemView.findViewById(R.id.notificationDate);
        notificationStatus = (TextView) itemView.findViewById(R.id.notificationStatus);
        orderDescription = (TextView) itemView.findViewById(R.id.orderDescription);
        root = (LinearLayout) itemView.findViewById(R.id.root);
    }

}

private String convertDate(String date) {
    String convertedDate;

    String[] parts = new String[2];
    parts = date.split("T");
    date = parts[0];

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");
    Date testDate = null;
    try {
        testDate = sdf.parse(date);
    }catch(Exception ex){
        ex.printStackTrace();
    }
    SimpleDateFormat formatter = new SimpleDateFormat("dd.mm.yyyy");
    convertedDate = formatter.format(testDate);

    return convertedDate;
}
}

推荐答案

我遇到了同样的问题，我找到的唯一解决方案是:

I had the same problem and the only solution I found for this is:

holder.setIsRecyclable(false);

您的回收器将不再回收，因此滚动时项目将相同，如果要删除某些项目不要使用notifyitemRemoved(position)，使用notifyDataSetChanged() 代替.

Your recycler will not recycle anymore so the items will be the same when you scroll, and if you want to delete some item do not use notifyitemRemoved(position), use notifyDataSetChanged() instead.

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