How to pass and get value from fragment and activity?
Here is the Android Studio proposed solution (= when you create a Blank-Fragment with File -> New -> Fragment -> Fragment(Blank) and you check "include fragment factory methods").
Put this in your Fragment:
class MyFragment: Fragment {
...
companion object {
@JvmStatic
fun newInstance(isMyBoolean: Boolean) = MyFragment().apply {
arguments = Bundle().apply {
putBoolean("REPLACE WITH A STRING CONSTANT", isMyBoolean)
}
}
}
}
.apply
is a nice trick to set data when an object is created, or as they state here:
Calls the specified function [block] with
this
value as its receiver and returnsthis
value.
Then in your Activity or Fragment do:
val fragment = MyFragment.newInstance(false)
... // transaction stuff happening here
and read the Arguments in your Fragment such as:
private var isMyBoolean = false
override fun onAttach(context: Context?) {
super.onAttach(context)
arguments?.getBoolean("REPLACE WITH A STRING CONSTANT")?.let {
isMyBoolean = it
}
}
Enjoy the magic of Kotlin!