How to read array data from the firestore using kotlin?

Question

I am new in android development and when I read array data from firestore using following code

val variable = arrayOf(document.get("restaurant"))

and then loop over the variable using code

varibale.forEach {
    Log.d("someTag", ${it.toString()} + " is your data")
}

I get the result with square brackets at log as following
[somedata, somedata2] is your data

my problem is that forEach loop runs only once and I am not able to get the result (without square brackets) as following

somedata is your data
somedata2 is your data

I have 2 elements in my restaurant array in firestore I will be very thankfull to any one who will help me.

Please edit your question and add your database structure as a screenshot. — Alex Mamo
– Alex Mamo, Commented Aug 5, 2020 at 14:22

Luiz Rodrigo · Accepted Answer · 2020-08-05 14:26:47Z

1

You are actually wrapping an array/list into another array when using arrayOf, that's why you see those brackets. Instead, try casting your document.get("restaurant") and then looping directly through it.

answered Aug 5, 2020 at 14:26

Luiz Rodrigo

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1 Comment

imnishchhal Over a year ago

Thanks a lot friend.. some more info document.get("restaurant") was a ArrayList so I have to cast into ArrayList as follows "val variable = document.get("restaurant") as ArrayList<String>"

Doug Stevenson · Accepted Answer · 2020-08-05 15:40:06Z

0

arrayOf doesn't parse an array. It creates a new array using the elements you pass to it. That's not what you want. You should instead cast document.get("restaurant") to the type that you expect to get from Firestore.

If a field is an array of strings, then the SDK will give you a List<*>, and you will need to make sure each item in the list is a String, if that's what you stored in the array.

val variable = document.get("restaurant") as List<*>
// Iterate variable here, make sure to check or convert items to strings

answered Aug 5, 2020 at 15:40

Doug Stevenson

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