Singleton with parameter in Kotlin

Question

I am trying to convert an Android app from Java to Kotlin. There are a few singletons in the app. I used a companion object for the singletons without constructor parameters

Answer 1

Singletons

Singletons are used often enough for a simpler way of creating them to exist. Instead of the usual static instance, getInstance() method and a private constructor, Kotlin uses the object notation. For consistency, object notation is also used to define static methods.

 object CommonApiConfig {
private var commonApiConfig: CommonApiConfig? = null
fun getInstance(): CommonApiConfig {
    if (null == commonApiConfig) {
        commonApiConfig = CommonApiConfig
       }
    return CommonApiConfig.commonApiConfig!!
   }
}