I want to open my dialogfragment class from a fragment and want to return the data from the dialog fragment. I am a uni student and had an example app where it was done from the main activity with a callback implementation but when I try to open the dialog from a fragment it still directs it to the main activity not the fragment I opened it from. Can I do this with the callback implementation or do I have to do something else?
I have code from the example project which works when it is launched from the main activity. I searched for it online and found that it can be done with navigation arguments too but wanted to do this way if possible. If not I would appreciate what do I have to change to do with the navigation arguments because I didn’t quite understand it.
class MenuFragment : Fragment(), PlanAdapter.PlanItemClickListener, PlanItemDialogFragment.NewPlanItemDialogListener {
private lateinit var binding : FragmentMenuBinding
private lateinit var database: PlanListDatabase
private lateinit var adapter: PlanAdapter
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
binding = FragmentMenuBinding.inflate(inflater, container, false)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
database = PlanListDatabase.getDatabase(requireActivity().applicationContext)
binding.fab.setOnClickListener{
PlanItemDialogFragment().show(
childFragmentManager,
PlanItemDialogFragment.TAG
)
}
}
class PlanItemDialogFragment : DialogFragment() {
interface NewPlanItemDialogListener {
fun onPlanItemCreated(newItem: PlanItem)
}
private lateinit var listener: NewPlanItemDialogListener
private lateinit var binding: DialogNewItemBinding
override fun onAttach(context: Context) {
super.onAttach(context)
listener = context as? NewPlanItemDialogListener
?: throw RuntimeException("Activity must implement the NewPlanItemDialogListener interface!")
}
override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
binding = DialogNewItemBinding.inflate(LayoutInflater.from(context))
return AlertDialog.Builder(requireContext())
.setTitle(hu.bme.aut.android.mobil_hf.R.string.new_plan_item)
.setView(binding.root)
.setPositiveButton(hu.bme.aut.android.mobil_hf.R.string.button_ok) { dialogInterface, i ->
if (isValid()) {
listener.onPlanItemCreated(getPlanItem())
}
}
.setNegativeButton(hu.bme.aut.android.mobil_hf.R.string.button_cancel, null)
.create()
}