Read a numerical data with many decimal places from Cloud Firestore in Kotlin - kotlin

Question

I am trying to read a numeric data from Cloud Firestore. This number contains many decimals and from Kotlin I only get the first whole number. I have tried to fix it with BigDecimal, but it still doesn't work. Can you help me? Thank you.
fun obtenerDatosBD() {
var readBTC:Int
if (email != null) {
db.collection("users").document(email).get().addOnSuccessListener {
if(it.exists()){
readBTC = it.getDouble("BTC")?.toInt()!!
val test = BigDecimal(readBTC)
println("DATOS: $test")
}else{
//No existen datos
db.collection("users").document(email).set(
hashMapOf(
"Saldo" to "0,00",
"BTC" to 0.000000,
"Provider" to provider
)
)
}
}
}
}

Answer 1

You are losing all the decimal points here:
it.getDouble("BTC")?.toInt()!!
You are reading it as Double and then making it an Int. Instead you should try and read it as a String and give that to the BigDecimal constructor.
fun obtenerDatosBD() {
var readBTC: String //Int has no decimal places
if (email != null) {
db.collection("users").document(email).get().addOnSuccessListener {
if (it.exists()) {
readBTC = it.getString("BTC") //or `it.get("BTC") as? String?` or something, I don't know what type of object `it` is
//something to do if readBTC is null, like a return, or have the non existence message in another fun and call it from here as well.
val test = BigDecimal(readBTC)
println("DATOS: $test")
} else {
//No existen datos
db.collection("users").document(email).set(
hashMapOf(
"Saldo" to "0,00",
"BTC" to 0.000000,
"Provider" to provider
)
)
}
}
}
}

Answer 2

fun obtenerDatosBD() {
var readBTC:String
if (email != null) {
db.collection("users").document(email).get().addOnSuccessListener {
if(it.exists()){
readBTC = it.getString("BTC").toString()
val test = BigDecimal(readBTC)
val testInt: Double = test.toDouble()
println("DATOS: $test + $testInt")
}else{
//No existen datos
db.collection("users").document(email).set(
hashMapOf(
"Saldo" to "0,00",
"BTC" to "0.000000",
"Provider" to provider
)
)
}
}
}
}