CODEWITHSUNDEEP
androidkotlinandroid-recyclerviewandroid-viewholder
Angel
Angel

Reputation: 35

How can I get the details of a recyclerview item without the adapterPosition?

I have a recyclerView in my kotlin app that shows a list of items, when i click on one my app navigates to other fragment that shows the details of that recyclerview item, my problem is when I filter the results, it uses the adapterPosition that in this case, its different from the position of the data in the json.

When I filter the data with searchView, I submit to the adapter the new list with the filters applied.

Fragment where the recyclerview is: (Here i would like to send as a string one of the fields shown in the recyclerview item i click)

private var museumsListAdapter=MuseumsListAdapter{ it ->
        val bundle = Bundle().apply {
            putInt(INDICE,it)
        }
        findNavController().navigate(R.id.action_ListMuseumsFragment_to_detailsMuseumFragment, bundle)
    }

Adapter of the recyclerView:

class MuseumsListAdapter(private val onMuseumSelected: (Int) -> Unit):
    ListAdapter<MuseumsFieldsItem, MuseumsListViewHolder>(MuseumsFieldsItem.DIFF_CALLBACK) {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MuseumsListViewHolder {
        val itemView=MuseumListItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return MuseumsListViewHolder(itemView.root){
            onMuseumSelected(it)
        }
    }

    override fun onBindViewHolder(holder: MuseumsListViewHolder, position: Int) {
        holder.bind(getItem(position))
    }
}

ViewHolder of the recyclerview:

lass MuseumsListViewHolder(itemView: View, private val onItemClicked: (Int) ->Unit) : RecyclerView.ViewHolder(itemView) {
    val itemBinding=MuseumListItemBinding.bind(itemView)

    init {
        itemView.setOnClickListener{
            onItemClicked(adapterPosition)
        }
    }

And in the other fragment (details one) I get the value "INDICE" of the bundle.

Upvotes: 0

Views: 188

Answers (1)

a_local_nobody
a_local_nobody

Reputation: 8191

class MuseumsListAdapter(private val onMuseumSelected: (Int) -> Unit):

this is a callback which takes in an int, so just don't use int :)

class MuseumsListAdapter(private val onMuseumSelected: (Foo) -> Unit):

where Foo represents whatever you model is, make use of Museum in your case

inside your:

itemView.setOnClickListener{
        onMuseumSelected(adapterPosition)
}

you now need an instance of your Museum class.

by using private val onMuseumSelected: (Foo) -> Unit you'll get back a complete model to your fragment/activity, so you can use whatever field you need

Upvotes: 2

Related Questions