尝试使用 picasso 显示来自 FirebaseFirestore 的图像时出错

Question

我正在尝试显示来自 firebasefirestore.The 的图像和文本文本显示良好，但我无法显示图像。显示图像的正确方法是什么，因为我所遵循的教程似乎不准确或者缺少某些内容我试着寻找一些答案，但没有真正得到足够的帮助下面是我的主要 activity 和模型类

主要Activity

package com.example.tutorscape;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.firebase.ui.firestore.FirestoreRecyclerAdapter;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import com.squareup.picasso.Picasso;

public class MainActivity extends AppCompatActivity {

    private RecyclerView mFirebaseList;
    private FirebaseFirestore firebaseFirestore;

    private FirestoreRecyclerAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        firebaseFirestore=FirebaseFirestore.getInstance();
        mFirebaseList= findViewById(R.id.recyclerView);


        Query query = firebaseFirestore.collection("Admin");


        FirestoreRecyclerOptions<Model> options = new FirestoreRecyclerOptions.Builder<Model>()
                .setQuery(query,Model.class)
                .build();
         adapter= new FirestoreRecyclerAdapter<Model, MyViewHolder>(options) {
            @NonNull
            @Override
            public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
               View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item,parent,false);

                return new MyViewHolder(view);
            }

            @Override
            protected void onBindViewHolder(@NonNull MyViewHolder holder, int position, @NonNull Model model) {


                 holder.list_name.setText(model.getName());
                 holder.list_title.setText(model.getTitle());
              //  Picasso.get().load(model.getImage()).into(imageView);


             }
        };


        mFirebaseList.setHasFixedSize(true);
        mFirebaseList.setLayoutManager(new LinearLayoutManager(this));
        mFirebaseList.setAdapter(adapter);

    }
    private class MyViewHolder extends RecyclerView.ViewHolder{

        private TextView list_name;
        private TextView list_title;
      //  private ImageView imageView;
        public MyViewHolder(@NonNull View itemView) {
            super(itemView);

            list_name=itemView.findViewById(R.id.textViewName);
            list_title=itemView.findViewById(R.id.textViewTitle);
       //     imageView=itemView.findViewById(R.id.imageView);

        }
    }


    @Override
    protected void onStart() {
        super.onStart();
        adapter.startListening();
    }

    @Override
    protected void onStop() {
        super.onStop();
        adapter.stopListening();
    }
}

型号Class

package com.example.tutorscape;

public class Model {
    private String name;
    private String title;

    private String image;
    private Model(){}

    public Model(String name, String title,String image) {
        this.name = name;
        this.title = title;
        this.image=image;
    }
    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

图片的url在浏览器中打开很好

Answer 1

我认为你必须这样调用 Picasso，

Picasso.get().load(model.getImage()).into(holder.imageView);

就像调用holder.list_name设置文本一样。

取消注释这些行，这是正确的。

private ImageView imageView;

imageView=itemView.findViewById(R.id.imageView);

希望它现在有效！

Answer 2

在此取消注释所有内容并将 imageView 移除至 holder.imageView Picasso.get().load(model.getImage()).into(imageView)

尝试使用 picasso 显示来自 FirebaseFirestore 的图像时出错

Error while trying to display images from FirebaseFirestore using picasso

android

viewmodel

picasso

google-cloud-firestore