我的代码如下所示:
public class PopularItemsAdapter extends RecyclerView.Adapter<PopularItemsAdapter.MyViewHolder>
implements MyCartListener {
private Context mContext;
private List<FoodTruckItem> foodTruckItemList;
private boolean isClickable = false;
private OnItemClickListener listener;
private List<FoodtruckInfo> foodtruckInfoList = new ArrayList<>();
private List<FoodTruckItem> sessionItem = new ArrayList<>();
private boolean isConflictResolved = false;
public int position = -1;
@Override
public void itemUpdated(int quantity, String itemId) {
for (int i = 0; i < foodTruckItemList.size(); i++) {
if (itemId.equals(foodTruckItemList.get(i).getItemId())) {
foodTruckItemList.get(i).setItemQuantityOrdered(quantity);
// notifyDataSetChanged();
}
}
}
@Override
public void itemRemoved(String itemId) {
for (int j = 0; j < foodTruckItemList.size(); j++) {
if (itemId.equals(foodTruckItemList.get(j).getItemId())) {
foodTruckItemList.remove(j);
// notifyDataSetChanged();
}
}
}
public void addConflictItem(int position) {
isConflictResolved = true;
notifyItemChanged(position);
}
public interface OnItemClickListener {
void onItemClick(FoodTruckItem foodTruckItem, FoodtruckInfo foodtruckInfo);
void showSnackBar(int items, boolean added, int position);
void showRestaurentClosed();
void showWarningDialog(int position);
}
public void addFoodInfo(List<FoodtruckInfo> foodtruckInfos) {
foodtruckInfoList.addAll(foodtruckInfos);
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView itemName, foodPrice, addText, quantityText, addQuantity, removeQuantity;
public ImageView itemImage, itemTag;
public LinearLayout addLayout;
public MyViewHolder(View view) {
super(view);
itemTag = (ImageView) view.findViewById(R.id.itemTag);
itemImage = (ImageView) view.findViewById(R.id.itemImage);
itemName = (TextView) view.findViewById(R.id.itemName);
foodPrice = (TextView) view.findViewById(R.id.foodPrice);
addText = (TextView) view.findViewById(R.id.addText);
addLayout = (LinearLayout) view.findViewById(R.id.addLayout);
quantityText = (TextView) view.findViewById(R.id.quantityText);
addQuantity = (TextView) view.findViewById(R.id.addQuantity);
removeQuantity = (TextView) view.findViewById(R.id.removeQuantity);
view.setOnClickListener(this);
}
@Override
public void onClick(View view) {
FoodtruckInfo foodtruckInfo = new FoodtruckInfo();
//passing the clicked position to the parent class
for (FoodtruckInfo info : foodtruckInfoList) {
if (info.getItemId().equals(foodTruckItemList.get(getAdapterPosition()).getItemId())) {
foodtruckInfo = info;
}
}
listener.onItemClick(foodTruckItemList.get(getAdapterPosition()), foodtruckInfo);
}
}
public PopularItemsAdapter(Context mContext, List<FoodTruckItem> foodTruckItemList, OnItemClickListener listener) {
this.mContext = mContext;
this.foodTruckItemList = foodTruckItemList;
this.listener = listener;
MyCart.getInstance().addListener(this);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_view_popular_items, parent, false);
return new MyViewHolder(itemView);
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
final FoodTruckItem foodTruckItem = foodTruckItemList.get(position);
if (SessionManager.get(mContext).getFoodTruckItemList() != null) {
sessionItem = SessionManager.get(mContext).getFoodTruckItemList();
for (FoodTruckItem item : sessionItem) {
if (item.getItemId().equals(foodTruckItem.getItemId())) {
// holder.itemTag.setText("MY FAVOURITE");
holder.itemTag.setImageDrawable(ContextCompat.getDrawable(mContext, R.drawable.ic_favorite));
}
}
}
holder.itemName.setText(foodTruckItem.getItemName());
// holder.itemTag.setText(foodTruckItem.getSpecialTag());
holder.foodPrice.setText("$" + String.valueOf(foodTruckItem.getItemPrice()));
Picasso.Builder builder = new Picasso.Builder(mContext);
builder.listener(new Picasso.Listener() {
@Override
public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
exception.printStackTrace();
}
});
if (!TextUtils.isEmpty(foodTruckItem.getItemImg())) {
builder.build().load(foodTruckItem.getItemImg()).into(holder.itemImage);
}
holder.addText.setOnClickListener(new View.OnClickListener() {
FoodtruckInfo info = new FoodtruckInfo();
@Override
public void onClick(View v) {
for (int l = 0; l < foodtruckInfoList.size(); l++) {
if (foodtruckInfoList.get(l).getItemId().equals(foodTruckItem.getItemId())) {
if (foodtruckInfoList.get(l).getOrderStatus() == 0) {
isClickable = true;
} else {
isClickable = false;
}
}
}
if (isClickable) {
String foodTruckId = null;
if (MyCart.getInstance().getFoodTruckId() != null) {
foodTruckId = MyCart.getInstance().getFoodTruckId();
if (!foodTruckId.equals(foodtruckInfoList.get(position).getFoodTruckId())) {
listener.showWarningDialog(position);
} else {
addItem(holder, position, foodTruckItem);
}
} else {
isConflictResolved = false;
addItem(holder, position, foodTruckItem);
}
} else {
listener.showRestaurentClosed();
}
if (isConflictResolved) {
isConflictResolved = false;
addItem(holder, position, foodTruckItem);
}
}
});
holder.addQuantity.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int quantity = foodTruckItem.getItemQuantityOrdered();
quantity += 1;
holder.quantityText.setText(String.valueOf(quantity));
MyCart.getInstance().updateQuantity(quantity, foodTruckItem.getItemId(), false);
}
});
holder.removeQuantity.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int quantity = foodTruckItem.getItemQuantityOrdered();
quantity -= 1;
if (quantity == 0) {
MyCart.getInstance().removeItem(foodTruckItem.getItemId(), false);
holder.addLayout.setVisibility(View.INVISIBLE);
holder.addText.setVisibility(View.VISIBLE);
listener.showSnackBar(quantity, false, position);
} else {
holder.quantityText.setText(String.valueOf(quantity));
MyCart.getInstance().updateQuantity(quantity, foodTruckItem.getItemId(), false);
}
}
});
setFontStyle(holder);
}
private void addItem(MyViewHolder holder, int position, FoodTruckItem foodTruckItem) {
holder.addLayout.setVisibility(View.VISIBLE);
holder.addText.setVisibility(View.INVISIBLE);
foodTruckItem.setItemQuantityOrdered(1);
holder.quantityText.setText(String.valueOf(1));
MyCart.getInstance().addItem(foodTruckItem);
MyCart.getInstance().setFoodTruckId(foodtruckInfoList.get(position).getFoodTruckId());
listener.showSnackBar(MyCart.getInstance().getItemList(), true, position);
}
private void setFontStyle(MyViewHolder holder) {
holder.itemName.setTypeface(Typeface.createFromAsset(mContext.getAssets(), Consts.montserrat_bold));
// holder.itemTag.setTypeface(Typeface.createFromAsset(mContext.getAssets(), Consts.montserrat_bold));
holder.foodPrice.setTypeface(Typeface.createFromAsset(mContext.getAssets(), Consts.montserrat_bold));
holder.addText.setTypeface(Typeface.createFromAsset(mContext.getAssets(), Consts.montserrat_bold));
}
@Override
public int getItemCount() {
return foodTruckItemList.size();
}
}
在这里
addConflictItem()我已经写了notifyItemChanged，但是不知何故它没有调用onBindViewHolder，那么应用程序中是否缺少任何内容？ 最佳答案
我遇到了同样的问题，这对我有用，只需将这些行添加到您的recyclerview声明中，请参阅this Asnswer
DefaultItemAnimator animator = new DefaultItemAnimator() {
@Override
public boolean canReuseUpdatedViewHolder(RecyclerView.ViewHolder viewHolder) {
return true;
}
};
mRecyclerView.setItemAnimator(animator);
关于android - notifyItemChanged方法不会在recyclerview中调用onBindViewHolder，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/45665302/