Java Mga boss pahelp naman kung pano maretrieve ang nagenerate na id or key ng push kotlin firebase

[flinch1209]

btnSyncing.setOnClickListener
val user = FirebaseAuth.getInstance().currentUser
val userid = user!!.uid
database = FirebaseDatabase.getInstance()
reference = database.getReference("Profile")
val key = database.key
val timeTextView = findViewById<TextView>(R.id.txtTime)
val dateTextView = findViewById<TextView>(R.id.txtDate)
val txtdate = findViewById<TextView>(R.id.date)
val inputDate = txtdate.text.toString()
reference.child(userid).child("Delivery Details").child().orderByChild("Date").equalTo(inputDate).addListenerForSingleValueEvent(object:
ValueEventListener {
override fun onDataChange(dataSnapshot: DataSnapshot) {
val time = dataSnapshot.child("Time").value as String?
val date = dataSnapshot.child("Details").value as String?

timeTextView.text = time
dateTextView.text = date
}

override fun onCancelled(error: DatabaseError) {
Toast.makeText(baseContext, "Something wrong happened!", Toast.LENGTH_LONG)
.show()
}

})}