Kotlin initializing an object

Question

I have a base class that I am extending, but want to inflate a view where the normal Java constructor would be.

class TextView(context: Context?) : ViewAbstractClass(context) 

I am not sure how to do this in Kotlin. What are the constructs are there Kotlin that allow you to do complex initialisation of objects?

Answer 1

https://kotlinlang.org/docs/reference/classes.html#constructors

class Customer(name: String) {
    init {
        logger.info("Customer initialized with value ${name}")
    }
}

Answer 2

There are a couple ways this can be done, however this is what I've been doing in my app.

class TextView : ViewAbstractClass {

    constructor(context: Context) : super(context)
    constructor(context: Context, attributeSet: AttributeSet) : super(context, attributeSet)
    constructor(context: Context, attributeSet: AttributeSet, defStyleAttr: Int) : super(context, attributeSet, defStyleAttr) {
        // custom init code for this constructor.
    }
    constructor(context: Context, attributeSet: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attributeSet, defStyleAttr, defStyleRes)

    init {
        // Common init code
    }

}

Notice that you don't actually use () in the class signature, but instead provide all the constructors explicitly.

You can learn more about secondary constructors here: https://kotlinlang.org/docs/reference/classes.html