您如何修复 Firebase 存储异常？答案

【问题标题】：How do you fix firebase storage exceptions?您如何修复 Firebase 存储异常？
【发布时间】：2020-08-05 08:02:52
【问题描述】：

您好，我正在开发一个 Kotlin 应用程序，并且一直在使用 Firebase。但是，我遇到了这个错误：

2020-08-05 00:56:45.764 9163-9296/com.example.realtimechat E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2020-08-05 00:56:45.767 9163-9296/com.example.realtimechat E/StorageException: {  "error": {    "code": 404,    "message": "Not Found.  Could not get object",    "status": "GET_OBJECT"  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found.  Could not get object",    "status": "GET_OBJECT"  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(com.google.firebase:firebase-storage@@19.1.1:433)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(com.google.firebase:firebase-storage@@19.1.1:450)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(com.google.firebase:firebase-storage@@19.1.1:441)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(com.google.firebase:firebase-storage@@19.1.1:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(com.google.firebase:firebase-storage@@19.1.1:286)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(com.google.firebase:firebase-storage@@19.1.1:70)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(com.google.firebase:firebase-storage@@19.1.1:62)
        at com.google.firebase.storage.GetDownloadUrlTask.run(com.google.firebase:firebase-storage@@19.1.1:76)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)

我正在尝试从 Firebase 提取信息以在回收站视图中显示它们，但我不知道我做错了什么。

我的片段：

package com.example.realtimechat.findfriends

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.example.realtimechat.R
import com.example.realtimechat.common.Constants
import com.example.realtimechat.common.NodeNames
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseUser
import com.google.firebase.database.*

class FindFriendsFragment: Fragment() {

    private var rvFindFriends: RecyclerView? = null
    private var findFriendsAdapter: FindFriendAdapter? = null
    private var findFriendsModelList: MutableList<FindFriendModel> = ArrayList()
    private var tvEmptyFriendsList: TextView? = null

    private var databaseReference: DatabaseReference? = null
    private var currentUser: FirebaseUser? = null
    private var progressBar: View? = null

    private var databaseReferenceFriendRequests: DatabaseReference? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_find_friends, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        rvFindFriends = view.findViewById(R.id.rvFindFriends)
        tvEmptyFriendsList = view.findViewById(R.id.tvEmptyFriendsList)
        progressBar = view.findViewById(R.id.progressBar)

        rvFindFriends!!.layoutManager = LinearLayoutManager(activity)

        findFriendsModelList = ArrayList()
        findFriendsAdapter = FindFriendAdapter(activity!!, findFriendsModelList)
        rvFindFriends!!.adapter = findFriendsAdapter

        databaseReference = FirebaseDatabase.getInstance().reference.child(NodeNames.USERS);
        currentUser  = FirebaseAuth.getInstance().currentUser;

        databaseReferenceFriendRequests = FirebaseDatabase.getInstance().reference.child(NodeNames.FRIEND_REQUESTS).child(currentUser!!.uid);

        tvEmptyFriendsList!!.visibility = View.VISIBLE;
        progressBar!!.visibility = View.VISIBLE;

        val query: Query = databaseReference!!.orderByChild(NodeNames.USERNAME)
        query.addValueEventListener(object: ValueEventListener{
            override fun onDataChange(snapshot: DataSnapshot) {
                findFriendsModelList.clear()

                for(ds: DataSnapshot in snapshot.children){
                    val userId = ds.key
                    if(userId.equals(currentUser?.uid)){
                        continue
                    }

                    if(ds.child(NodeNames.USERNAME).value !=null){
                        val username = ds.child(NodeNames.USERNAME).value.toString()
                        val photoFileName = ds.child(NodeNames.PHOTO).value.toString()

                        databaseReferenceFriendRequests!!.child(userId!!).addListenerForSingleValueEvent(object: ValueEventListener{
                            override fun onDataChange(snapshot: DataSnapshot) {
                                if(snapshot.exists()){
                                    val requestType = snapshot.child(NodeNames.REQUEST_TYPE).value.toString()
                                    if(requestType == Constants.REQUEST_STATUS_SENT){
                                        findFriendsModelList.add(FindFriendModel(userId, photoFileName, username, true))
                                        findFriendsAdapter!!.notifyDataSetChanged()
                                    }
                                }else{
                                    findFriendsModelList.add(FindFriendModel(userId, photoFileName, username, false))
                                    findFriendsAdapter!!.notifyDataSetChanged()
                                }
                            }

                            override fun onCancelled(error: DatabaseError) {
                                progressBar?.visibility = View.GONE
                            }
                        })
                        progressBar?.visibility = View.GONE
                        tvEmptyFriendsList?.visibility = View.GONE
                    }
                }
            }

            override fun onCancelled(error: DatabaseError) {
                progressBar?.visibility = View.GONE
                Toast.makeText(context, "Failed to fetch friend list ${error.message}", Toast.LENGTH_SHORT).show()
            }
        })
    }
}

我的适配器：

package com.example.realtimechat.findfriends

import android.content.Context
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.*
import androidx.recyclerview.widget.RecyclerView
import com.bumptech.glide.Glide
import com.example.realtimechat.R
import com.example.realtimechat.common.Constants
import com.example.realtimechat.common.NodeNames
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseUser
import com.google.firebase.database.DatabaseReference
import com.google.firebase.database.FirebaseDatabase
import com.google.firebase.storage.FirebaseStorage


class FindFriendAdapter(private val context: Context,
                        private val findFriendModelList: List<FindFriendModel> = mutableListOf()) : RecyclerView.Adapter<FindFriendAdapter.FindFriendViewHolder>() {


    private var friendRequestDatabase: DatabaseReference? = null
    private var currentUser: FirebaseUser? = null
    private var userId: String? = null

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): FindFriendAdapter.FindFriendViewHolder {
        val view: View = LayoutInflater.from(context).inflate(R.layout.custom_find_friends_layout, parent, false)
        return FindFriendViewHolder(view)
    }

    override fun onBindViewHolder(holder: FindFriendAdapter.FindFriendViewHolder, position: Int) {
        val friendModel = findFriendModelList[position]
        holder.tvUsername.text = friendModel.username

        val fileRef = FirebaseStorage.getInstance().reference.child(Constants.IMAGES_FOLDER + "/" + friendModel.photoFileName)
        fileRef.downloadUrl.addOnSuccessListener { uri ->
            Glide.with(context)
                .load(uri)
                .placeholder(R.drawable.ic_profileicon)
                .error(R.drawable.ic_profileicon)
                .into(holder.ivProfile)
        }

        friendRequestDatabase = FirebaseDatabase.getInstance().reference.child(NodeNames.FRIEND_REQUESTS)
        currentUser = FirebaseAuth.getInstance().currentUser

        if(friendModel.requestSent!!){
            holder.btnSendRequest.visibility = View.GONE
            holder.pbRequest.visibility = View.VISIBLE
        }else{
            holder.btnSendRequest.visibility = View.VISIBLE
            holder.pbRequest.visibility = View.GONE
        }

        holder.btnSendRequest.setOnClickListener {
            holder.btnSendRequest.visibility = View.GONE
            holder.pbRequest.visibility = View.VISIBLE

            userId = friendModel.userId

            friendRequestDatabase!!.child(currentUser!!.uid).child(userId!!).child(NodeNames.REQUEST_TYPE)
                .setValue(Constants.REQUEST_STATUS_SENT)
                .addOnCompleteListener { task ->
                    if(task.isSuccessful){
                        friendRequestDatabase!!.child(userId!!).child(currentUser!!.uid).child(NodeNames.REQUEST_TYPE)
                            .setValue(Constants.REQUEST_STATUS_RECEIVED)
                            .addOnCompleteListener { task ->
                                if(task.isSuccessful){
                                    Toast.makeText(context, "Request sent successfully!", Toast.LENGTH_SHORT).show()

                                    holder.btnSendRequest.visibility = View.GONE
                                    holder.pbRequest.visibility = View.GONE
                                    holder.btnCancelRequest.visibility = View.VISIBLE
                                }
                            }.addOnFailureListener{ exception ->
                                Toast.makeText(context, "Failed to send request ${exception.localizedMessage}", Toast.LENGTH_SHORT).show()

                                holder.btnSendRequest.visibility = View.VISIBLE
                                holder.pbRequest.visibility = View.GONE
                                holder.btnCancelRequest.visibility = View.GONE
                            }
                    }
                }.addOnFailureListener{ exception ->
                    Toast.makeText(context, "Failed to send request ${exception.localizedMessage}", Toast.LENGTH_SHORT).show()

                    holder.btnSendRequest.visibility = View.VISIBLE
                    holder.pbRequest.visibility = View.GONE
                    holder.btnCancelRequest.visibility = View.GONE
                }
        }

        holder.btnCancelRequest.setOnClickListener {
            holder.btnCancelRequest.visibility = View.GONE
            holder.pbRequest.visibility = View.VISIBLE

            userId = friendModel.userId

            friendRequestDatabase!!.child(currentUser!!.uid).child(userId!!).child(NodeNames.REQUEST_TYPE)
                .setValue(null)
                .addOnCompleteListener { task ->
                    if(task.isSuccessful){
                        friendRequestDatabase!!.child(userId!!).child(currentUser!!.uid).child(NodeNames.REQUEST_TYPE)
                            .setValue(null)
                            .addOnCompleteListener { task ->
                                if(task.isSuccessful){
                                    Toast.makeText(context, "Request cancelled successfully!", Toast.LENGTH_SHORT).show()

                                    holder.btnSendRequest.visibility = View.VISIBLE
                                    holder.pbRequest.visibility = View.GONE
                                    holder.btnCancelRequest.visibility = View.GONE
                                }
                            }.addOnFailureListener{ exception ->
                                Toast.makeText(context, "Failed to cancel request ${exception.localizedMessage}", Toast.LENGTH_SHORT).show()

                                holder.btnSendRequest.visibility = View.GONE
                                holder.pbRequest.visibility = View.GONE
                                holder.btnCancelRequest.visibility = View.VISIBLE
                            }
                    }
                }.addOnFailureListener{ exception ->
                    Toast.makeText(context, "Failed to cancel request ${exception.localizedMessage}", Toast.LENGTH_SHORT).show()

                    holder.btnSendRequest.visibility = View.GONE
                    holder.pbRequest.visibility = View.GONE
                    holder.btnCancelRequest.visibility = View.VISIBLE
                }
        }
    }

    override fun getItemCount(): Int {
        return findFriendModelList.size
    }

    inner class FindFriendViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val ivProfile: ImageView = itemView.findViewById(R.id.ivProfilePic)
        val tvUsername: TextView = itemView.findViewById(R.id.tvUsername)
        val btnSendRequest: Button = itemView.findViewById(R.id.btnSendRequest)
        val btnCancelRequest: Button = itemView.findViewById(R.id.btnCancelRequest)
        val pbRequest: ProgressBar = itemView.findViewById(R.id.pbRequest)

    }
}

我的片段 XML 文件：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context=".findfriends.FindFriendsFragment"
    android:background="@android:color/white">

    <include
        android:id="@+id/progressBar"
        layout="@layout/custom_progressbar"
        android:visibility="gone"/>


    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rvFindFriends"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </androidx.recyclerview.widget.RecyclerView>

    <TextView
        android:id="@+id/tvEmptyFriendsList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="Friends list will appear here"
        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

任何帮助将不胜感激！

【问题讨论】：

此错误来自 firebase 存储而不是来自 firebase 数据库。请检查您尝试访问的对象是否存在于 Firebase 存储中
@HasnainSabir 是的，firebase 存储代码存在于我的适配器类中。你能看看那个并检查我的代码吗，因为我仍然不确定我做错了什么
sir 代码存在，但问题是您尝试访问的图像不可用或您遇到一些路径问题。
我明白了；但是，唯一的路径是“images/”和val fileRef = FirebaseStorage.getInstance().reference.child(Constants.IMAGES_FOLDER + "/" + friendModel.photoFileName)，我相信我正确地指向了那条路径。
做 yoo 记录图像名称并验证它。并检查图像格式是 .png 还是 .jpg 等

标签： android firebase kotlin firebase-realtime-database android-recyclerview

【解决方案1】：

您正面临404 network request 错误，这意味着您尝试访问的对象在服务器中不可用。

 val fileRef = FirebaseStorage.getInstance().reference.child(Constants.IMAGES_FOLDER + "/" + friendModel.photoFileName)

  //your firebase storage path is not available or exist please have a look on it.

【讨论】：

我觉得这很奇怪，因为在我的 Firebase 控制台（连接到这个应用程序）上，所有需要的材料都存在。
知道我刚才说的有什么建议吗？
您能否在您的 Firebase 存储控制台中验证此路径 (Constants.IMAGES_FOLDER + "/" +friendModel.photoFileName)
请在friendModel.photoFileName进行调试
能否附上您的 Firebase 存储控制台的屏幕截图。

【解决方案2】：

我已经解决了这个问题。

查看适配器文件（发生错误的位置），我发现friendModel.photoFileName 返回：

/v0/b/realtimechat-280e1.appspot.com/o/images/D7sZ9AdePTZIsniSGEIhlfSXbfD2.jpg

但是，存储中的文件名是：

D7sZ9AdePTZIsniSGEIhlfSXbfD2.jpg

因此，文件名不正确，无法显示图像。为了解决这个问题，/v0/b/realtimechat-280e1.appspot.com/o/images/ 应该从 /v0/b/realtimechat-280e1.appspot.com/o/images/D7sZ9AdePTZIsniSGEIhlfSXbfD2.jpg 所以只剩下D7sZ9AdePTZIsniSGEIhlfSXbfD2.jpg。所以我做了requestModel.photoFileName!!.substring(requestModel.photoFileName!!.lastIndexOf("/")+1)，这意味着我只保留String的部分在最后一个/，所以只剩下D7sZ9AdePTZIsniSGEIhlfSXbfD2.jpg。

最终代码： val fileRef = FirebaseStorage.getInstance().reference.child(Constants.IMAGES_FOLDER + "/" + friendModel.photoFileName!!.substring(friendModel.photoFileName!!.lastIndexOf("/")+1))

fileRef.downloadUrl.addOnSuccessListener {uri -> Glide.with(context).load(uri).placeholder(R.drawable.ic_profileicon).error(R.drawable.ic_profileicon).into(holder.ivProfile)}

我不确定此代码是否适用于所有情况，因此如果您对此有更好的解决方案，最好将其发布。谢谢

【讨论】：