Everytime fragment instance is created and reloading when you press back.
How to overcome this issue?
Inability of having proper backstack in nav controller is a huge productivity issue. Hope it's a missing feature or a work-around made on purpose... IMO this is a must-have and has to be introduced sooner rather than later (however: https://issuetracker.google.com/issues/109856764 says We won't be allowing customization of the transaction type (such as hiding/showing, etc) for the foreseeable future.) :(
Nav-Framework is nice, however, it create fragment's view every time
Does anyone has solution?
My code is to navigate using Navigation
object NavigationHelper : Navigational {
override fun moveDownWithPop(view: View,id: Int,popStackId: Int) {
Navigation.findNavController(view).navigate(id,
null,
NavOptions.Builder()
.setPopUpTo(popStackId,
true).build()
)
}
override fun moveDownWithDataPop(view: View,id: Int,popStackId: Int,bundle : Bundle) {
Navigation.findNavController(view).navigate(id,
bundle,
NavOptions.Builder()
.setPopUpTo(popStackId,
true).build()
)
}
override fun moveUp(view: View) {
Navigation.findNavController(view).navigateUp()
}
override fun moveDown(view: View,id: Int) {
Navigation.findNavController(view).navigate(id)
}
override fun moveDown(view: View,id: Int,args : Bundle) {
Navigation.findNavController(view).navigate(id,args)
}
fun navigateGraph(graphId : Int,context : Context){
var finalHost: NavHostFragment? = NavHostFragment.create(graphId)
(context as MainActivity).supportFragmentManager.beginTransaction()
.replace(com.admision.R.id.content,finalHost!!)
.setPrimaryNavigationFragment(finalHost) // this is the equivalent to app:defaultNavHost="true"
.commit()
}
}
i found some blog Why I Will Not Use Architecture Navigation Component
I did like this, but still I am waiting for resolution from google.
Here we did but still waiting for better approch
if (manageEventViewModel == null) {
manageEventViewModel = ViewModelProviders.of(activity!!).get(ManageEventViewModel::class.java)
manageEventViewModel!!.setBinder(binding!!,context!!,listingType)
loadAdvertisement(binding!!.advertise.imgAdvertisement,binding!!.advertise.tvAdvertisement,binding!!.advertise.llAdvertisement)
}
Full code
class ManageEventsFragment : BaseFragment() {
private var binding: FragmentFindEventsBinding? = null
private var manageEventViewModel: ManageEventViewModel? = null
override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View? {
if (binding == null)
binding = DataBindingUtil.inflate(inflater,R.layout.fragment_find_events,container,false)
var listingType: String? = null
if (arguments != null) {
listingType = arguments!!.getString(Constant.LISTINGTYPE)
/*if (listingType != null && listingType.equals(Constant.SEARCHLIST)) {
val data = arguments!!.getString(Constant.SEARCHEVENTMODEL)
val managetEventDataModel = com.admision.manageevents.utils.Utils.getManageEventDataModel(data)
manageEventViewModel!!.setSearchDataModel(managetEventDataModel!!)
}*/
}
val sharedViewModel = ViewModelProviders.of(activity!!).get(SharedViewModel::class.java)
sharedViewModel!!.dataToShare.observe(this,Observer<ManageEventsDataModel> { managetEventDataModel ->
listingType = Constant.SEARCHLIST
manageEventViewModel!!.setSearchDataModel(managetEventDataModel!!)
})
if (manageEventViewModel == null) {
manageEventViewModel = ViewModelProviders.of(activity!!).get(ManageEventViewModel::class.java)
manageEventViewModel!!.setBinder(binding!!,context!!,listingType)
loadAdvertisement(binding!!.advertise.imgAdvertisement,binding!!.advertise.tvAdvertisement,binding!!.advertise.llAdvertisement)
}
return binding!!.root
}
}