Question

我有一个包含很多物品的recyclerview。我使用适配器从服务器填充recyclerview，即名称，日期，时间等，它工作正常。

我遇到的唯一问题是当我尝试 根据布尔值 填充它时。当我尝试添加 图片星 （针对收藏夹选项）时，以及当我尝试设置 已关闭 时（对于有效选项），我总是使用“收藏夹图标”和“已关闭”消息获取所有项目。

例如，当工作时间返回活动为假时，我想要做的是这样：

if (!restaurant.getActive()) {
    holder.isClosed.setVisibility(View.VISIBLE);
}

当我从 RestaurantDescriptionActivity 设置它时，布尔工作得很好，它会在服务器上保存和更新，它也会返回正确的值，所以我不确定我的错误在哪里是

我在我的RestaurantModel中返回boolean的值：

@SerializedName("favourites")
private boolean isFavourite;
@SerializedName("active")
private boolean active;
----
public void writeToParcel(Parcel parcel, int i) {

    parcel.writeString(thumbnailUrl);
    parcel.writeString(dateTime);
    parcel.writeString(id);
    parcel.writeValue(comments_enabled);
    // I TRIED WRITING BOOLEAN TO PARCEL IN TWO WAYS, AS SHOWN BELOW
    parcel.writeValue(isFavourite);
    parcel.writeInt(active ? 1 : 0);
}

//// UPDATED PART
protected restaurant(Parcel in) {
   ...
    isFavourite = (Boolean) in.readValue(Boolean.class.getClassLoader());
    active = Boolean.parseBoolean(in.readString());   
}
//// UPDATED PART

public boolean getActive() {
    return active;
}

public void setActive(boolean active) {
    this.active = active;
}

适配器：

class restaurantsViewHolder extends RecyclerView.ViewHolder {
    public TextView restaurantName, date, time, isClosed;
    ImageView thumbNail, isFavourite;

    restaurantsViewHolder(View itemView) {
        super(itemView);

        thumbNail = itemView.findViewById(R.id.thumbnail);
        isFavourite = itemView.findViewById(R.id.imageViewIsFavourite);
        restaurantName= itemView.findViewById(R.id.restaurantNameIcon);
        date = itemView.findViewById(R.id.date);
        time = itemView.findViewById(R.id.time);
        isClosed= itemView.findViewById(R.id.restaurantIsClosed);
    }
}

public restaurantsAdapter(List<restaurant> restaurantList, Context context) {
    this.restaurantItems = restaurantList;
    this.context = context;
}

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

    return new restaurantsViewHolder(itemView);
}

@Override
public void onBindViewHolder(restaurantsAdapter.restaurantsViewHolder holder, int position) {
    // getting restaurant data for the row
    restaurant restaurant = restaurantItems.get(position);

    holder.restaurantName.setText(restaurant.getrestaurantName());
    LocalDateTime ldt = LocalDateTime.parse(restaurant.getDateTime(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
    String formattedDate = ldt.format(getLocalizedDateFormatter(Locale.getDefault()));

    holder.date.setText(formattedDate);
    //holder.date.setText(convertDate(restaurant.getDateTime())); //string dobiti u formatu, pretvoriti ga u localized i podijeliti na dva dijela
    holder.time.setText(convertTime(restaurant.getDateTime()));
    holder.isFavourite.clearColorFilter();
    if (!restaurant.getActive()) {
        holder.isClosed.setVisibility(View.GONE);
    }
    if (restaurant.getIsFavourite()) {
        holder.isFavourite.setImageResource(R.drawable.ic_icon_star_ppdcolor);
    }

}

Answer 1

您需要在RecyclerView项目内部编写其他部分，否则它将重新填充其先前的视图状态。

if (!restaurant.getActive()) {
    holder.isClosed.setVisibility(View.GONE);
} else{
    holder.isClosed.setVisibility(View.VISIBLE);
}

if (restaurant.getIsFavourite()) {
    holder.isFavourite.setImageResource(R.drawable.ic_icon_star_ppdcolor);
} else{
    holder.isFavourite.setImageResource(R.drawable.your_icon_when_not_favourite);
}

Answer 2

为喜欢的点击事件创建界面，并在代码...

下面的主要活动中将该记录值设置为true

onItemClickListner onItemClickListner;


public interface onItemClickListner{
    void onItemClick(restaurant restaurantobj); // you can pass or object or value to need to access in recycler view activity.
}
public void setOnItemClickListner(RecyclerViewAdpater.onItemClickListner onItemClickListner) {
    this.onItemClickListner = onItemClickListner;
}

@Override
public void onBindViewHolder(ItemViewHolder holder, int position) {
    if (!restaurant.getActive()) {
        holder.isClosed.setVisibility(View.GONE);
    } else{
        holder.isClosed.setVisibility(View.VISIBLE);
    }

    if (restaurant.getIsFavourite()) {
        holder.isFavourite.setImageResource(R.drawable.ic_icon_star_ppdcolor);
    } else{
        holder.isFavourite.setImageResource(R.drawable.your_icon_when_not_favourite);
    }
    holder.isFavourite.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            onItemClickListner.onItemClick(restaurant);
        }
    });
 }

以及在mainactivity中定义使用下面代码的适配器对象...

之后

adpater.setOnItemClickListner(new RecyclerViewAdpater.onItemClickListner() {
        @Override
        public void onItemClick(restaurant restaurantobj) {
            restaurantobj.setActive(true);
            restaurantList.add(restaurantobj);
            adpater.notifyDataSetChanged();
        }
    });

在recyclerview中显示值（基于布尔值）会为所有项返回相同的结果

2 个答案: