如何将背景传递给毕加索

Question

您好我正在尝试使用Picasso添加图像,但是当我使用以下视图持有者时,在适配器中获取Picasso的上下文时遇到问题:

这是我的适配器

               public class DataAdapter extends 
                  RecyclerView.Adapter<DataAdapter.ViewHolder> {
                            private ArrayList<String> 
                              al_prod_name,al_prod_price,al_prod_id,
                                 al_prod_image;

                    public DataAdapter(ArrayList<String> al_prod_id, 
                           ArrayList<String> al_prod_name,
                               ArrayList<String> al_prod_price, 
                                  ArrayList<String> al_prod_image) {
                                   this.al_prod_id = al_prod_id;
                                   this.al_prod_price = al_prod_price;
                                   this.al_prod_name = al_prod_name;
                                   this.al_prod_image = al_prod_image
                               }


                      public DataAdapter.ViewHolder 
                         onCreateViewHolder(ViewGroup viewGroup, int i) {
                              View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cardrow, viewGroup, 
                                    false);
                              return new ViewHolder(view);
                             }

                        public void onBindViewHolder(DataAdapter.ViewHolder 
                          viewHolder, int i) {

                             viewHolder.tv_prod_name.setText
                               (al_prod_name.get(i));
                             viewHolder.tv_prod_price.setText
                               (al_prod_price.get(i));

                        Picasso.with().load(al_prod_image.get(i))
                       .placeholder(R.drawable.floatingicon)
                       .error(R.drawable.floatingicon).
                       .into(viewHolder.img_prod);

                          }
                      public int getItemCount() {
                      return al_prod_id.size();
                      }

                   public class ViewHolder extends RecyclerView.ViewHolder{
                      private TextView tv_prod_name,tv_prod_price;
                      private ImageView img_prod;
                      public ViewHolder(View view) {
                      super(view);

                       tv_prod_name = (TextView)view
                       .findViewById(R.id.tv_prod_name);
                        tv_prod_price = (TextView)view
                       .findViewById(R.id.tv_prod_price);
                       img_prod = (ImageView)view
                       .findViewById(R.id.img_prod);
                       }
                       }
                       }

请帮助获取上下文.这是我设置适配器的方式:

                       RecyclerView.Adapter adapter = new 
                       DataAdapter(al_prod_id,al_prod_name,
                       al_prod_price,al_prod_image);

Answer 1

最简单的解决方案是使用viewHolder.itemView.getContext()

Picasso.with(viewHolder.itemView.getContext()).load(al_prod_image.get(i))
                   .placeholder(R.drawable.floatingicon)
                   .error(R.drawable.floatingicon).
                   .into(viewHolder.img_prod);