How to pass and get value from fragment and activity

Question

How to pass and get value from fragment and activity?

Answer 1

There is the companion object for that (https://kotlinlang.org/docs/reference/object-declarations.html#companion-objects )

Define your fragment as usual, and declare the companion that acts as the static newInstance() equivalent in Java :

class ViewStackListFragment : Fragment() {
  companion object {
        fun newInstance(position: Int): ViewStackListFragment {
            val fragment = ViewStackListFragment()
            val args = Bundle()
            args.putInt("position", position)
            fragment.setArguments(args)
            return fragment
        }
    }
}

And simply call it like in Java :

val fragment = ViewStackListFragment.newInstance(4)