Multiple Constructors In Kotlin

June 05, 2018 , 0 Comments

In some cases when we need to use a class with different objects as its constructor argument. In such case we have to create multiple constructors. In Kotlin there is a predefined constructor called primary constructor which can either be an empty or with arguments.

Primary Constructor or Default Constructor

This is normal way in which we create a constructor. In this case SampleClass expects only one type of argument.

class SampleClass(context: Context) {
var mContext = context

//Rest of the code in the class

Multiple Constructors

In this case we have two constructors with different types of arguments. Let’s see how we define them.

class SampleClass() {

var mApp: Application? = null
lateinit var mContext: Context

constructor (app: Application) : this() {
mApp = app
mContext = app.applicationContext

constructor(context: Context) : this() {
mContext = context

//Rest of the code in the class

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