Does the library or framework support a type that allows null value for Any type?

In Android (and Kotlin), the type Any is the base type for all objects and by default does not allow null values. To permit null, the nullable version of the type — Any? — is used.

Example:

var value: Any = "Hello"  // cannot be null
var nullableValue: Any? = null  // can be null

Thus, if you need a variable that can hold any type or null, you should use Any?.