How to pass and get value from fragment and activity

Question

How to pass and get value from fragment and activity?

Answer 1

use this to send arguments to fragment

fun newInstance(index: Int): MyFragment {
    val f = MyFragment ()
    // Pass index input as an argument.
    val args = Bundle()
    args.putInt("index", index)
    f.setArguments(args)
    return f
}

And get those arguments like this

val args = arguments
val index = args.getInt("index", 0)