Firebase存储数据库和存储图像

Question

我听说过要将图像存储到Firebase数据库，它需要先发送到Firebase存储。

因此，我已经开发了一些代码来将图像发送到Firebase存储并将URI映射到Firebase数据库。

    var selectedPhotoUri: Uri? = null

    //dev picture section storage
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)

    //Firebase Storage
    val storage = Firebase.storage//picture need to store in storage before sent to database with uri
    val storageRef = storage.reference
    val magesRef = storageRef.child("images")

    if (requestCode == 0 && resultCode == Activity.RESULT_OK && data != null){
        Log.d("MainActivity","Photo was selected")

        selectedPhotoUri = data.data
        val bitmap = MediaStore.Images.Media.getBitmap(contentResolver, selectedPhotoUri)
        val bitmapDrawable = BitmapDrawable(bitmap)
        addpicture.setBackgroundDrawable(bitmapDrawable)
        addpicture.alpha = 0f
    }
}

//dev picture section database
private fun uploadImageToFirebase(){
    if (selectedPhotoUri == null) return
    val database = Firebase.database
    val filename = addpicture.toString()
    val refphoto = database.getReference("/user/uid/images/$filename")

    //saved picture to the Firebase Database
    refphoto.setValue(filename)
        .addOnSuccessListener {
            Log.d("MainActivity", "Saved the diary picture to Firebase Database")
        }
}

任何人都可以确保该代码正常工作吗？

因为我无法将图像保存到我的Android虚拟设备中

Answer 1

我更改了您的代码。您可以尝试这样：

private fun uploadImageToFirebase(fileUri: Uri, uid : String) {
if (fileUri != null) {
    val fileName = UUID.randomUUID().toString() +".jpg"

    val database = FirebaseDatabase.getInstance()
    val refStorage = FirebaseStorage.getInstance().reference.child("images/$fileName")

    refStorage.putFile(fileUri)
        .addOnSuccessListener(
            OnSuccessListener<UploadTask.TaskSnapshot> { taskSnapshot ->
                taskSnapshot.storage.downloadUrl.addOnSuccessListener {
                    val refUser = database.getReference("users")
                    val imagesId = refUser.push().key!!
                    val imageModel = ImageModel(fileName, it.toString())
                    refUser.child(uid).child("images").child(imagesId).setValue(imageModel)
                }
            })

        ?.addOnFailureListener(OnFailureListener { e ->
            print(e.message)
        })
    }
}

data class ImageModel(
  var name: String? = "",
  var url : String = ""
)