java - 错误错误: cannot find symbol class Picasso

Question

使用最新版本的 picasso 2.7 在 picasso 中出现此错误...并且使用了正确的方法，但仍然无法解决，请帮忙

import com.squareup.picasso.Picasso;

import java.util.ArrayList;

public class UserRecyclerAdapter extends 
  RecyclerView.Adapter<UserRecyclerAdapter.UserViewHolder> {

  public interface OnItemClickListener
  {
      void onItemClick(int position);
  }

OnItemClickListener listener;
Context context;
ArrayList<Movie> list;


public UserRecyclerAdapter(Context context, ArrayList<Movie> list , OnItemClickListener listener) {
    this.context = context;
    this.list = list;
    this.listener=listener;
}

@Override
public UserRecyclerAdapter.UserViewHolder onCreateViewHolder( ViewGroup parent, int viewType) {

    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View itemView = inflater.inflate(R.layout.single_row_layout,parent,false);
    UserViewHolder holder=new UserViewHolder(itemView);
    return holder;
}

@Override
public void onBindViewHolder(final UserRecyclerAdapter.UserViewHolder holder, int position) {

 Movie detail = list.get(position);

// holder.textview.setText(detail.getMovieName());


 holder.itemView.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {

         listener.onItemClick(holder.getAdapterPosition());
     }
 });
    Picasso.get().load("https://image.tmdb.org/t/p/w500"+detail.getPosterPath()).into(holder.imageview);

}

@Override
public int getItemCount()
{
    return list.size();
}

public class UserViewHolder extends RecyclerView.ViewHolder {

    View itemView;
   // TextView textview;
    ImageView imageview;

    public UserViewHolder(View itemView) {

        super(itemView);
       // textview = itemView.findViewById(R.id.textview);
        this.itemView = itemView;
        imageview = itemView.findViewById(R.id.imageview);
    }
  }
}

Answer 1

可能您没有在app.gradle文件中添加依赖项，

 implementation 'com.squareup.picasso:picasso:2.71828'

请检查一下。如果已添加，请尝试"file"->“将项目与 Gradle 文件同步”。

希望它能发挥作用。