Kotlin

Question

我很难从 firebase 存储中获取图像 URL，我从数据库中获取了照片 URL，但据我所知，Glide 无法从中获取图片link 像这样：com.google.firebase.storage.UploadTask@62873ce

这是我的存储和数据库参考资料：

 private fun StorageReference.uploadUserPhoto(uid: String, photo: Uri,
                                             onSuccess: (UploadTask.TaskSnapshot) -> Unit) {
    child("users/$uid/photo").putFile(mImageUri).addOnCompleteListener {
        if (it.isSuccessful) {
            mStorage.child("users/$uid/photo").downloadUrl.addOnCompleteListener { task ->
                if (it.isSuccessful) {
                    onSuccess(it.result!!)
                } else {
                    showToast(it.exception!!.message!!)
                }
            }
        }
    }
}


private fun DatabaseReference.updateUserPhoto(uid: String, photoUrl: String,
                                              onSuccess: () -> Unit){
    child("users/$uid/photo").setValue(photoUrl)
        .addOnCompleteListener {
            if (it.isSuccessful) {
                onSuccess()
            } else {
                showToast(it.exception!!.message!!)
            }
        }
}

函数如下：

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    if (requestCode == TAKE_PICTURE_REQUEST_CODE && resultCode == RESULT_OK) {
        val uid = mAuth.currentUser!!.uid
        mStorage.uploadUserPhoto(uid, mImageUri) {
            val photoUrl = it.task.toString()
            mDatabase.updateUserPhoto(uid, photoUrl) {
                mUser = mUser.copy(photo = photoUrl)
                profile_image.loadUserPhoto(mUser.photo)
            }
        }
    }
}

我尝试更改

val photoUrl = it.task.toString()

至

val photoUrl = it.downloadUrl.toString()

但它突出显示 'downloadUrl' 为未解决的引用

完整代码：

    package com.example.homeactivity.activities

import android.annotation.SuppressLint
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.os.Environment
import android.provider.MediaStore
import android.text.Editable
import android.util.Log
import android.widget.ImageView
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.FileProvider
import com.example.homeactivity.R
import com.example.homeactivity.models.User
import com.example.homeactivity.views.PasswordDialog
import com.google.firebase.auth.AuthCredential
import com.google.firebase.auth.EmailAuthProvider
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
import com.google.firebase.storage.StorageReference
import com.google.firebase.storage.UploadTask
import kotlinx.android.synthetic.main.activity_edit_profile.*
import java.io.File
import java.text.SimpleDateFormat
import java.util.*


class EditProfileActivity : AppCompatActivity(), PasswordDialog.Listener {

    private lateinit var mImageUri: Uri
    private lateinit var mStorage: StorageReference
    private val TAG = "EditProfileActivity"
    private lateinit var mUser: com.example.homeactivity.models.User
    private lateinit var mAuth: FirebaseAuth
    private lateinit var mDatabase: DatabaseReference
    private lateinit var mPendingUser: com.example.homeactivity.models.User
    private val TAKE_PICTURE_REQUEST_CODE = 1
    val simpleDateFormat = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US)


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_edit_profile)
        Log.d(TAG, "onCreate")

        close_image.setOnClickListener { finish() }
        save_image.setOnClickListener { updateProfile() }
        change_photo_text.setOnClickListener { takeCameraPicture() }

        mAuth = FirebaseAuth.getInstance()
        mDatabase = FirebaseDatabase.getInstance().reference
        mStorage = FirebaseStorage.getInstance().reference

        mDatabase.child("users").child(mAuth.currentUser!!.uid)
            .addListenerForSingleValueEvent(ValueEventListenerAdapter {
                mUser = it.getValue(com.example.homeactivity.models.User::class.java)!!
                name_input.setText(mUser.name, TextView.BufferType.EDITABLE)
                username_input.setText(mUser.username, TextView.BufferType.EDITABLE)
                website_input.setText(mUser.website, TextView.BufferType.EDITABLE)
                bio_input.setText(mUser.bio, TextView.BufferType.EDITABLE)
                email_input.setText(mUser.email, TextView.BufferType.EDITABLE)
                phone_input.setText(mUser.phone?.toString(), TextView.BufferType.EDITABLE)
                profile_image.loadUserPhoto(mUser.photo)
            })
    }

    private fun takeCameraPicture() {
        val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        if (intent.resolveActivity(packageManager) != null) {
            val imageFile = createImageFile()
            mImageUri = FileProvider.getUriForFile(
                this,
                "com.example.homeactivity.fileprovider",
                imageFile
            )
            intent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri)
            startActivityForResult(intent, TAKE_PICTURE_REQUEST_CODE)
        }
    }

    private fun createImageFile(): File {
        val storageDir: File? = getExternalFilesDir(Environment.DIRECTORY_PICTURES)
        return File.createTempFile(
            "JPEG_${simpleDateFormat.format(Date())}_",
            ".jpg",
            storageDir
        )
    }

    @SuppressLint("MissingSuperCall")
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (requestCode == TAKE_PICTURE_REQUEST_CODE && resultCode == RESULT_OK) {
            val uid = mAuth.currentUser!!.uid
            mStorage.uploadUserPhoto(uid, mImageUri) {
                val photoUrl = it.task.toString()
                mDatabase.updateUserPhoto(uid, photoUrl) {
                    mUser = mUser.copy(photo = photoUrl)
                    profile_image.loadUserPhoto(mUser.photo)
                }
            }
        }
    }


    private fun updateProfile() {
        mPendingUser = readInputs()
        val error = validate(mPendingUser)
        if (error == null) {
            if (mPendingUser.email == mUser.email) {
                updateUser(mPendingUser)
            } else {
                PasswordDialog().show(supportFragmentManager, "password_dialog")
            }
        } else {
            showToast(error)
        }
    }


    private fun readInputs(): User {
        return User(
            name = name_input.text.toString(),
            username = username_input.text.toString(),
            email = email_input.text.toString(),
            website = website_input.text.toStringOrNull(),
            bio = bio_input.text.toStringOrNull(),
            phone = phone_input.text.toStringOrNull()
        )
    }

    override fun onPasswordConfirm(password: String) {
        if (password.isNotEmpty()) {
            val credential = EmailAuthProvider.getCredential(mUser.email, password)
            mAuth.currentUser!!.reauthenticate(credential) {
                mAuth.currentUser!!.updateEmail(mPendingUser.email) {
                    updateUser(mPendingUser)
                }
            }
        } else {
            showToast("You must enter your password")
        }
    }

    private fun updateUser(user: com.example.homeactivity.models.User) {
        val updatesMap = mutableMapOf<String, Any?>()
        if (user.name != mUser.name) updatesMap["name"] = user.name
        if (user.username != mUser.username) updatesMap["username"] = user.username
        if (user.website != mUser.website) updatesMap["website"] = user.website
        if (user.bio != mUser.bio) updatesMap["bio"] = user.bio
        if (user.email != mUser.email) updatesMap["email"] = user.email
        if (user.phone != mUser.phone) updatesMap["phone"] = user.phone

        mDatabase.updateUser(mAuth.currentUser!!.uid, updatesMap) {
            showToast("Profile saved")
            finish()
        }
    }

    private fun validate(user: com.example.homeactivity.models.User): String? =
        when {
            user.name.isEmpty() -> "Please enter name"
            user.username.isEmpty() -> "Please enter username"
            user.email.isEmpty() -> "Please enter email"
            else -> null
        }

    private fun FirebaseUser.updateEmail(email: String, onSuccess: () -> Unit) {
        updateEmail(email).addOnCompleteListener {
            if (it.isSuccessful) {
                onSuccess()
            } else {
                showToast(it.exception!!.message!!)
            }
        }
    }

    private fun StorageReference.uploadUserPhoto(uid: String, photo: Uri,
                                                 onSuccess: (UploadTask.TaskSnapshot) -> Unit) {
        child("users/$uid/photo").putFile(mImageUri).addOnCompleteListener {
            if (it.isSuccessful) {
                mStorage.child("users/$uid/photo").downloadUrl.addOnCompleteListener { task ->
                    if (it.isSuccessful) {
                        onSuccess(it.result!!)
                    } else {
                        showToast(it.exception!!.message!!)
                    }
                }
            }
        }
    }


    private fun DatabaseReference.updateUserPhoto(uid: String, photoUrl: String,
                                                  onSuccess: () -> Unit){
        child("users/$uid/photo").setValue(photoUrl)
            .addOnCompleteListener {
                if (it.isSuccessful) {
                    onSuccess()
                } else {
                    showToast(it.exception!!.message!!)
                }
            }
    }

    private fun DatabaseReference.updateUser(
        uid: String, updates: Map<String, Any?>,
        onSuccess: () -> Unit
    ) {
        child("users").child(uid).updateChildren(updates)
            .addOnCompleteListener {
                if (it.isSuccessful) {
                    onSuccess()
                } else {
                    showToast(it.exception!!.message!!)
                }
            }
    }

    private fun FirebaseUser.reauthenticate(credential: AuthCredential, onSuccess: () -> Unit) {
        reauthenticate(credential).addOnCompleteListener {
            if (it.isSuccessful) {
                onSuccess()
            } else {
                showToast(it.exception!!.message!!)
            }
        }
    }
}

Answer 1

像这样更改您的 uploadUserPhoto 方法

    private fun StorageReference.uploadUserPhoto(uid: String, photo: Uri,
                                             onSuccess: (String) -> Unit) {
    val uTask = mStorage.child("users/$uid/photo").putFile(mImageUri)
    child("users/$uid/photo").putFile(mImageUri).addOnCompleteListener {
        if (it.isSuccessful) {
            uTask.continueWithTask { task ->
                mStorage.child("users/$uid/photo").downloadUrl
            }.addOnCompleteListener{
               if (it.isSuccessful && it.result != null) {
                    onSuccess(it.result!!.toString)
                } else {
                    showToast(it.exception!!.message!!)
                }
            }
        }
    }
}

在你的 onActivityResult 中使用 url like

 val photoUrl = it

Kotlin - Firebase 和 Glide - 获取图像 url 以便 glide 可以使用它

Kotlin - Firebase and Glide - get image url so glide can use it

android

firebase

firebase-storage

android-glide