lloydblv / backpresshandle Goto Github PK
View Code? Open in Web Editor NEWDemonstration of back press event handling in fragments
Demonstration of back press event handling in fragments
Fragment:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
requiredActivity().onBackPressedDispatcher.addCallback(
this,
object : OnBackPressedCallback(true) {
override fun handleOnBackPressed() {
when (bottomSheet.state) {
BottomSheetBehavior.STATE_HALF_EXPANDED -> {
closeBottomSheet()
}
else -> {
requiredActivity().onBackPressed()
}
}
})
}
For the first time that the bottom sheet is expanded, when I press the back button, it closes the bottom sheet. Then, I want to leave the fragment and activity that host this fragment. So, I press the back button again but, it gets into a loop; Checking the when
clause, going through else
and again and again.
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