How to declare a constructor without arguments?

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How to declare a constructor without arguments?

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#1 by (1 votes)

1

I'm trying to get all the documents from firebase and convert them directly into an object but I jump with the following error:

java.lang.RuntimeException: Could not deserialize object. Class com.chdzma.changeproject.objects.Food does not define a no-argument constructor. If you are using ProGuard, make sure these constructors are not stripped

And this is the class:

class Food(name:String, description: String, calories: Int, carbo: Int, fats: Int, proteins: Int, sodium: Int, sugar: Int) : Item{

    val name = name
    val description = description
    val calories = calories
    val carbo = carbo
    val fats = fats
    val proteins = proteins
    val sodium = sodium
    val sugar = sugar

    override fun getViewType(): Int {
        return 1
    }

}

firebase constructor kotlin

asked by chdzma 20.05.2018 в 22:27

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1 answer

oracle 18c on Ubuntu16 concurrency java threads

score 1 · Accepted Answer

only defines an empty constructor, this is necessary to capture data from firebase

class Food(){

 }

class Food(name:String, description: String, calories: Int, carbo: Int, fats: Int, proteins: Int, sodium: Int, sugar: Int) : Item{

    val name = name
    val description = description
    val calories = calories
    val carbo = carbo
    val fats = fats
    val proteins = proteins
    val sodium = sodium
    val sugar = sugar

    override fun getViewType(): Int {
        return 1
    }