How can I pass data from a recycler view button to fragment? [ kotlin or java]-CodePudding

I have a Bottom sheet fragment that has two fragments and one of the fragments has a recycler view with a button inside it. What I need is that if a user clicks that button it will swipe to the second fragment and pass the title of the text view with it. everything is working great but I don't know how to use my idea of coding if that's possible. I tried looking for answers, but none of them worked for me.

What I need is

Open a fragment from a button that's inside of a recycler view
When the other fragment gets open, I need to show a title that I passed from recycler view

Any help would be appreciated / Please use java or kotlin

My recycler view adapter

    class tvTitleAdapter (val context: Context,val TITLE_LIST : ArrayList<TvTitlesViewModel>)
    :  RecyclerView.Adapter<tvTitleAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.tv_titles_design, parent, false)
        return ViewHolder(view)
    }

    override fun getItemCount(): Int {
        return TITLE_LIST.size
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {

        val tvShow: TvTitlesViewModel = TITLE_LIST[position]
        holder.titleShow.text = tvShow.title
        holder.description.text = tvShow.description
        holder.showImage.setImageResource(tvShow.title_image)
        holder.tvTitleExpand.setOnClickListener {
            holder.description.visibility = View.VISIBLE
            holder.showImage.visibility = View.VISIBLE
            holder.tvTitleButton.visibility = View.VISIBLE

        }
        holder.tvTitleButton.setOnClickListener {
            when(position){
                0->{
                    // I need to swipe to the other fragment and pass data to it from here if 
                     that's possible 
                }
            }
        }
    }
    class ViewHolder(Itemview : View): RecyclerView.ViewHolder(Itemview){

        val titleShow = itemView.findViewById<TextView>(R.id.tvTitle)
        val description = itemView.findViewById<TextView>(R.id.tvDesription)
        val showImage = itemView.findViewById<ImageView>(R.id.tvImage)
        var tvTitleExpand = itemView.findViewById<CardView>(R.id.tvTitleExpand)
        val tvTitleButton = itemView.findViewById<Button>(R.id.tvTitleButton) // this is a button inside a recycler view
    }
}

My fragment

class TvTitlesFragment : Fragment() {

val TV_TITLE : ArrayList<TvTitlesViewModel> = ArrayList()

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

}

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_tv_titles, container, false)
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)

    val adapter = tvTitleAdapter(context!!,TV_TITLE)
    tvTitles.layoutManager = LinearLayoutManager(context, RecyclerView.VERTICAL, false)
    tvTitles.setHasFixedSize(true)
    tvTitles.adapter = adapter
    tvShowTitles()
}
private fun tvShowTitles(){
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))
    TV_TITLE.add(TvTitlesViewModel(R.drawable.abdelbasset_abdessamad, "برنامج على مائدة الأفطار", "برنامج على مائدة الافطار من تقديم الشيخ علي الطنطاوي رحمه الله, تم بث أول حلقة منه في عام 1960 م واستمر الى عام1992 م"))

}

P.C. I didn't add any codes in my second fragment

Here is a pic of my recycler view

If the user clicks the button I need to pass the title value and swipe to the second fragment

my second fragment pic

CodePudding user response：

With kotlin, you can use High Order function to call callback instead of creating interface like java.

Create a high order function in the Adapter's constructor. Then when you set click then you invoke and get that invoked data in view. As follows:

// You should change the class name to uppercase. Like `TvTitleAdapter`
class tvTitleAdapter (
    val context: Context, 
    val TITLE_LIST : ArrayList<TvTitlesViewModel>,
    private val onClick: ((tvTitleName: String) -> Unit)? = null // Pass the param you want. Here I try to pass String with name tvTitleName.
) : RecyclerView.Adapter<tvTitleAdapter.ViewHolder>() {

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        ...
        holder.tvTitleButton.setOnClickListener {
            when(position){
                0 -> {
                    onClick?.invoke(`your title`) // Pass your title in invoke.
                }
                else -> return@setOnClickListener
            }
        }
    }
}

In the initialization of TvTitleAdapter, you declare the onClick param. It will listen to the callback when you call invoke().

class TvTitlesFragment : Fragment() {
    
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        ...
        val adapter = tvTitleAdapter(
            requireContext(), 
            TV_TITLE,
            onClick = { tvTitleName ->
                // This code opens the `Second Fragment` with `tvTitleName` passed by the `newInstance()` function.
                requireActivity().supportFragmentManager
                    .beginTransaction()
                    .replace(R.id.your_fragment_container, SecondFragment.newInstance(tvTitleName))
                    .commit()
            } 
        )
    }
}

class SecondFragment : Fragment() {
    
    ...
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        ...
        // Get data from `TvTitlesFragment`
        val tvTitleName = argument?.getString(KEY_TV_TITLE_NAME)
        
        // Set data to your title
        binding.tvTitle.text = tvTitleName
    }

    companion object {
        private const val KEY_TV_TITLE_NAME = "KEY_TV_TITLE_NAME"

        // Create `SecondFragment` with bundle so you can send data from certain fragment to `SecondFragment`.
        fun newInstance(tvTitleName: String) : SecondFragment = SecondFragment().apply {
            val bundle = bundleOf(KEY_TV_TITLE_NAME to tvTitleName)
            arguments = bundle
        }
    }
}