How to define a public static Boolean in Kotlin

Question

I wanted to know how I define a static variable in Kotlin that can be used in other classes that do not final. Because the data is changing.

Example Java:

public static Boolean ActivityIsRuning = false;

Answer 1

There are three ways to achieve this:

1) Top-level / global declaration

Declare a variable outside of any class or function and it will be accessible from anywhere:

var activityIsRunning = false

2) object (an out of the box singleton)

object StaticData {
    var activityIsRunning = false
}

Accessable like this:

StaticData.activityIsRunning

3) Class with companion object (as Todd already suggested)

class Config {
    companion object {
        var activityIsRunning = false
    }
}

Accessable like this:

Config.activityIsRunning