How I can use callback in Kotlin?

Question

I have View and one CircleShape , which should show toast in this View. And I use it in main Activity. This is my interface

interface OnClickListenerInterfa         


        

Answer 1

Have you tried to use a lambda expression? For example in your case:

mCircleShape.setOnClickListener( 
    { _ -> ToastUtils.showSuccessMessage(context,"pressed") }
)

Or if you want to make it more kotlin style:

mCircleShape.listener = ( 
    { _ -> ToastUtils.showSuccessMessage(context,"pressed") }
)