Question 119487 in Firebase Question posted in
An extensive official documentation can be found here.

Firebase – Kotlin database if child is null

I want to call a function where drawableprofile is binding as a profile icon. I want to call it when "imageUrl" child doesn’t exist.

val uid = firebaseAuth.currentUser?.uid

if (uid != null) {
    database.child(uid).get().addOnSuccessListener {
        if (it.exists()) {
            val fetchimg = it.child("imageUrl").value
            Glide.with(this).load(fetchimg).into(binding.profileIcon)
        } else if {
            database.child(uid).child("imageUrl")
            val drawableprofile = resources.getDrawable(R.drawable.ic_person)
           
            Glide.with(this).load(drawableprofile).into(binding.profileIcon)
        }
    }
}

I can’t find any .isNull function etc. Thanks for help

Tags:

2

Answers


  1. 0

    According to your last comment:

    I need to do a placeholder until a user chooses his own profile image.

    Since you’re using Glide for Android to display your images, then you can simply call Glide#placeholder() like this:

    Glide
    .with(this)
    .load(fetchimg) //👈
    .centerCrop()
    .placeholder(R.drawable.ic_person)
    .into(binding.profileIcon);
    Login or Signup to reply.
  2. 0

    Replace your code with the following:

    val uid = firebaseAuth.currentUser?.uid
if (uid != null) {
    val valueEventListener = object : ValueEventListener {
        override fun onDataChange(snapshot: DataSnapshot) {
            if (snapshot.exists()) {
                val imageUrl = snapshot.getValue<String>()
                if (imageUrl != null) {
                    Glide.with(this).load(imageUrl).placeholder(R.drawable.ic_person).into(binding.profileIcon)
                    return
                }
                Glide.with(this).load(R.drawable.ic_profile).into(binding.profileIcon)
            }

            override fun onCancelled(error: DatabaseError) {
                Log.d("TAG", "onCancelled: ${error.message}")
            }
        }
        database.child(uid).addValueEventListener(valueEventListener)
    }
}
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search