Why documentt.data.getValue() gives empty string?

Asked Jul 18 '22 at 22:14

Active Jul 19 '22 at 15:12

Viewed 36 times

Please help my to get a value from Firestore

I have a Firestore database where "adminData" collection but only single value is essential. I will like to retrieve it from the firebase database and store it in string. I made a Data class Admin for getting values Can you please help me with the implementation in android studio using Kotlin?

 val db = FirebaseFirestore.getInstance()
        db.collection("adminData").get()
            .addOnCompleteListener { it ->
                if (it.isSuccessful) {
                    for (documentt in it.result!!) {
                        val users = documentt.toObject(Admin::class.java)
                         str2 = StringBuilder().apply {
                            append(users.payqiwi)
                        }.toString()

Why str2 is empty when return it?

picture of debugging

edited Jul 19 '22 at 15:12

asked Jul 18 '22 at 22:14

артем Карпиков

2

Please show how you are determining that the string is still empty. – Tenfour04 Jul 18 '22 at 23:13
I added another image for you – артем Карпиков Jul 19 '22 at 05:11
Please edit your question and add your database structure as a screenshot. Please respond with @AlexMamo – Alex Mamo Jul 19 '22 at 07:08
@AlexMamo Please have a look to my question – артем Карпиков Jul 19 '22 at 15:05
There is no way you can return `str2` as a result of a method. Firebase API is asynchronous. So please check the duplicate to see how can you solve this using a callback. You might also be interested in reading this [resource](https://medium.com/firebase-tips-tricks/how-to-read-data-from-cloud-firestore-using-get-bf03b6ee4953). – Alex Mamo Jul 19 '22 at 15:23

Why documentt.data.getValue() gives empty string?

0 Answers0