Kotlin Property items should be initialized before get

Question

 var items: Int by Delegates.notNull<Int>() db.collection("Testdatabase").get().addOnSuccessListener{ snap-> items=snap.size() } Log.i("items",items.toString())

and it says

Property items should be initialized before get

I have to use 'items' variable as a size of the snapshot. I searched some google but I can't figure out.. Can any one help please?

You must assign some value to items before you use them inside the Log. Remember that the Log statement will be executed first due to synchronous execution and then the items=snap.size() line So you must assign some value to items — gtxtreme
– gtxtreme, Commented Sep 8, 2021 at 12:15

Dwane13 · Accepted Answer · 2021-09-08 12:37:28Z

1

That happens because your addOnSuccessListener takes some time to get data. So in this example, you need to put your log statement inside addOnSuccessListener and you will be fine

answered Sep 8, 2021 at 12:37

Dwane13

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sooyeon Over a year ago

Thank you Thank you for telling me the reason!!

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