Kotlin Blueprints

Dealing with constants

Constants objects or variables are something where the value never changes throughout the life of an application. Do not make a mistake considering any val as constants. val are not constants, but they are immutable objects where a value once assigned cannot be changed, more like final objects in Java.

Companion objects do define constants that can be accessed in a static way. But the best way to define constants in Android is using a top-level file and dumping all your constants there.

To come to the conclusion of the previous line we did various experiments.

We started by using a simple companion object:

    class Constants {      companion object {        val TWITTER_SUCCESS = 140      }    }

Decompiling the preceding code results in the ...