我需要使用Picasso库将图像放入图像视图下面是我的代码
Picasso.get().load(mFilteredList.get(position).getViewProductImage()).into(holder.imageView);
但我得到的错误就像
java.lang.IllegalArgumentException：Target不能为null。 at com.squareup.picasso.RequestCreator.into（RequestCreator.java:682）at com.squareup.picasso.RequestCreator.into（RequestCreator.java:665）
任何人都可以告诉我如何将图像放入imagesView。下面是我的适配器类
public class ViewAllAdapter extends RecyclerView.Adapter<ViewAllAdapter.ViewAllViewHolder> {
List<String> listOfIds=new ArrayList<>();
ArrayList<ViewAllObject> data;
Context myContext;
private ImageView imageView;
private ArrayList<ViewAllObject> mFilteredList;
public ViewAllAdapter(List<ViewAllObject> data){
this.data= (ArrayList<ViewAllObject>) data;
this.mFilteredList = (ArrayList<ViewAllObject>) data;
}
@NonNull
@Override
public ViewAllViewHolder onCreateViewHolder(@NonNull final ViewGroup parent, int viewType) {
myContext = parent.getContext();
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.view_all_items,parent,false);
final TextView textView=(TextView)view.findViewById(R.id.view_all_product_vendor_name);
final TextView textView1=(TextView)view.findViewById(R.id.view_all_product_title);
return new ViewAllViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewAllViewHolder holder, int position) {
final ViewAllObject viewAllObject=data.get(position);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(myContext,DescriptionActivity.class);
i.putExtra("productname",viewAllObject.getVendorName());
i.putExtra("title",viewAllObject.getProductsTitle());
i.putExtra("description",viewAllObject.getProductDescription());
i.putStringArrayListExtra("imagesList", (ArrayList<String>) viewAllObject.getImagesList());
i.putExtra("productSet",viewAllObject.getProductSet());
i.putExtra("productQuantity",viewAllObject.getAvalibileQuantity());
i.putExtra("productId",viewAllObject.getProductId());
i.putExtra("productImage",viewAllObject.getViewProductImage());
i.putExtra("productType",viewAllObject.getViewAllProductType());
i.putExtra("productPrice",viewAllObject.getViewAllPrice());
myContext.startActivity(i);
}
});
LinearLayout addToCartIcon=(LinearLayout) holder.itemView.findViewById(R.id.view_all_items_cart_icon);
addToCartIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
List<Long> lisId=new ArrayList<>();
List<CartItemsTable> cartItems=Almirah.cartDB.MyDao().getCartItems();
for (CartItemsTable cartItemsTable1:cartItems) {
long productId = cartItemsTable1.getProductId();
lisId.add(productId);
}
boolean newItem = true;
for (int i=0;i<lisId.size();i++){
if (viewAllObject.getProductId() == lisId.get(i)){
newItem = false;
AlertDialog.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder = new AlertDialog.Builder(myContext, android.R.style.Theme_Material_Dialog_Alert);
} else {
builder = new AlertDialog.Builder(myContext);
}
builder.setMessage("Item Already In Cart")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
}
if (newItem) {
String date = new SimpleDateFormat("dd-MM-yyyy", Locale.getDefault()).format(new Date());
Gson gson = new Gson();
Type type = new TypeToken<List<String>>() {}.getType();
String imagesList = gson.toJson(viewAllObject.getImagesList(), type);
CartItemsTable cartItemsTable = new CartItemsTable();
cartItemsTable.setVendorName(viewAllObject.getVendorName());
cartItemsTable.setProductsTitle(viewAllObject.getProductsTitle());
cartItemsTable.setViewAllPrice(viewAllObject.getViewAllPrice());
cartItemsTable.setProductSet(viewAllObject.getProductSet());
cartItemsTable.setAvalibileQuantity(viewAllObject.getAvalibileQuantity());
cartItemsTable.setProductId(viewAllObject.getProductId());
cartItemsTable.setViewAllProductType(viewAllObject.getViewAllProductType());
cartItemsTable.setViewProductImage(viewAllObject.getViewProductImage());
cartItemsTable.setQuantity(1);
cartItemsTable.setDate(date);
cartItemsTable.setProductDescription(viewAllObject.getProductDescription());
cartItemsTable.setImagesList(imagesList);
ALmirah.cartDB.MyDao().addCartItems(cartItemsTable);
int cartCount=Integer.parseInt(ActivityForViewAll.countTextview.getText().toString());
ActivityForViewAll.countTextview.setText((cartCount+1)+"");
ActivityForViewAll.countTextview.setVisibility(View.VISIBLE);
Toast toast=Toast.makeText(myContext, viewAllObject.getProductsTitle() + " Added to cart", Toast.LENGTH_SHORT);
View view1 = toast.getView();
view1.getBackground().setColorFilter(Color.parseColor("#FFF7D3A5"), PorterDuff.Mode.SRC_IN);
toast.show();
}
}
});
// holder.bindItems(viewAllObject);
holder.viewAllProductVendorName.setText(mFilteredList.get(position).getVendorName());
holder.viewAllProductTitle.setText(mFilteredList.get(position).getProductsTitle());
holder.viewAllProductType.setText(mFilteredList.get(position).getViewAllProductType());
holder.viewAllProductPrice.setText(mFilteredList.get(position).getViewAllPrice()+"SR");
Picasso.get().load(mFilteredList.get(position).getViewProductImage()).into(holder.imageView); Picasso.get().load(viewAllObject.getViewProductImage()).into(imageView);
}
@Override
public int getItemCount() {
return mFilteredList.size();
}
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
mFilteredList = data;
} else {
ArrayList<ViewAllObject> filteredList = new ArrayList<>();
for (ViewAllObject viewAllObject : data) {
if (viewAllObject.getProductsTitle().toLowerCase().contains(charString) || viewAllObject.getViewAllProductType().toLowerCase().contains(charString) || viewAllObject.getViewAllPrice().toLowerCase().contains(charString)) {
filteredList.add(viewAllObject);
}
}
mFilteredList = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = mFilteredList;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
mFilteredList = (ArrayList<ViewAllObject>) filterResults.values;
notifyDataSetChanged();
}
};
}
public class ViewAllViewHolder extends RecyclerView.ViewHolder{
private TextView viewAllProductVendorName,viewAllProductTitle,viewAllProductType,viewAllProductPrice;
private ImageView imageView;
public ViewAllViewHolder(@NonNull View itemView) {
super(itemView);
viewAllProductVendorName=(TextView)itemView.findViewById(R.id.view_all_product_vendor_name);
ImageView imageView=(ImageView)itemView.findViewById(R.id.card_view_all_img);
viewAllProductTitle=(TextView)itemView.findViewById(R.id.view_all_product_title);
viewAllProductType=(TextView)itemView.findViewById(R.id.view_all_product_type);
viewAllProductPrice=(TextView)itemView.findViewById(R.id.view_all_product_price);
}
} }
更改
ImageView imageView = (ImageView) itemView.findViewById(R.id.card_view_all_img);
至
imageView = (ImageView) itemView.findViewById(R.id.card_view_all_img);