提问者:小点点

尝试使用picasso从FirebaseFirestore显示图像时出错


我正在尝试从FireBaseFireStore中显示图像和文本,文本显示得很好,但是我在尝试显示图像时被卡住了。什么是正确的方式显示图像,因为它似乎是教程我正在遵循的是不是点或者是遗漏了一些我尝试了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();
    }
}

模型类

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;
    }
}

图像的URL在浏览器中可以很好地打开


共1个答案

匿名用户

我想你应该这样称呼毕加索

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

这就像调用holder.list_name来设置文本一样。

取消注释这些行,它是正确的。

private ImageView imageView;

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


希望它现在起作用!