Android(Kotlin) Toast using Elvis Operator to use a Default String value when value from intent/arguments is Null

Question

I have this kind of implementation

Toast.makeText(activity,arguments?.get("message") as String, Toast.LENGTH_SHORT).show()

So, the thing is I want to make the use of Elvis Operator(?:) here, so as to use some default String, when the value to show inside toast is Null. I could not implement it properly. So, How do I implement it in the same line of code ??. Also, what will be the better way to do it ?? Thanks.

Answer 1

Simply put elvis operator after the nullable get call:

Toast.makeText(activity, arguments?.get("message") ?: "Default value", Toast.LENGTH_SHORT).show()

Here's some observations:

• null ?: "default" evaluates to default
• "valid str" ?: "default" evaluates to valid str