无法将存储在 Firebase 数据库中的图像（静态）提取到我的应用程序中

Question

我正在尝试访问存储在 firebase 存储中的图像，但它没有显示在应用程序中。而是休息一下所有细节，如产品名称、产品描述和价格都可以完美看到，但图像不会显示，甚至 Logcat 中也没有错误。

我是 Android Studio 的初学者。

这是我的Java代号"KeyChainActivity.java"

 package com.example.giftngame;

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.Toast;


import com.example.giftngame.Model.Products;
import com.example.giftngame.ViewHolder.ProductViewHolder;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import com.squareup.picasso.Picasso;

public class KeyChainActivity extends AppCompatActivity
{
    private DatabaseReference ProductsRef;
    private RecyclerView recyclerView;
    RecyclerView.LayoutManager layoutManager;

    private String CategoryName;


    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_category);

        CategoryName=getIntent().getExtras().get("category").toString().toString();
        Toast.makeText(this,CategoryName,Toast.LENGTH_SHORT).show();

        ProductsRef= FirebaseDatabase.getInstance().getReference().child("Products");

        recyclerView=findViewById(R.id.recycler_menu);
        recyclerView.setHasFixedSize(true);
        layoutManager=new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);

    }

    @Override
    protected void onStart()
    {
        super.onStart();

        FirebaseRecyclerOptions<Products> options=
                new FirebaseRecyclerOptions.Builder<Products>()
                .setQuery(ProductsRef,Products.class)
                .build();


        FirebaseRecyclerAdapter<Products, ProductViewHolder> adapter=
                new FirebaseRecyclerAdapter<Products, ProductViewHolder>(options) {
                    @Override
                    protected void onBindViewHolder(@NonNull ProductViewHolder holder, int position, @NonNull Products model)
                    {

                        holder.txtProductName.setText(model.getPname());
                        holder.txtProductDescription.setText(model.getDescription());
                        holder.txtProductPrice.setText("Price= "+model.getPrice()+ " INR");
                        Picasso.get().load(model.getImage()).into(holder.imageView);



                    }

                    @NonNull
                    @Override
                    public ProductViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
                    {
                        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_key_chain,parent,false);
                        ProductViewHolder holder=new ProductViewHolder(view);
                        return holder;

                    }
                };

        recyclerView.setAdapter(adapter);
        adapter.startListening();


    }
}

这是另一个 java 代码，我在其中声明了名为 "Products.java"

的 Firebase 数据库内容

     package com.example.giftngame.Model;

public class Products
{
    private String pname,description,image,category,date,time;
    private long pid,price;

    public Products()
    {

    }

    public Products(String pname, String description, long price, String image, String category, long pid, String date, String time)
    {
        this.pname = pname;
        this.description = description;
        this.price = price;
        this.image = image;
        this.category = category;
        this.pid = pid;
        this.date = date;
        this.time = time;
    }

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public long getPrice() {
        return price;
    }

    public void setPrice(long price) {
        this.price = price;
    }

    public String  getImage() {
        return image;
    }

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

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public long getPid() {
        return pid;
    }

    public void setPid(long pid) {
        this.pid = pid;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }
}

This is the image of my Firebase DataBase

Answer 1

您的视图中没有显示任何内容，因为您的 image 属性 而不是 持有正确的图像 URL。您存储的内容：

gs://giftngame-ae160-appspot...

它实际上是您的图像在 Firebase 存储中的位置，而不是实际的 URL。要解决此问题，当您创建 Products class 的新对象时，按照我在以下 post 中的回答中的解释传递图像的下载 URL：

How to get the download url from Firebase Storage?

无法将存储在 Firebase 数据库中的图像（静态）提取到我的应用程序中

Cannot fetch the image stored in Firebase database (statically) into my application

java

android

picasso

firebase-realtime-database

firebase-storage