pass data class between two fragments

Question

I think I'm doing it wrong but this is my situation.
I'm getting json data inside a fragment then process it with Gson to a data class and display it. What I need is to use this data again inside another fragment in a custom spinner adapter which is ready.

As much as I understand it's impossible to pass objects so how can I do this !? I have tried to use bundle and it didn't work

the onResponse method (First fragment)

            override fun onResponse(call: Call?, response: Response?) {
            val jsonString = response?.body()?.string()
            val gson = GsonBuilder().create()
            val data = gson.fromJson(jsonString,currancyModel::class.java)
            countryData = data
            activity?.runOnUiThread {
                rootView.recyclerView.adapter = CountryAdapter(data)
                }
        }

the data class

data class currancyModel(val items: List<Item>)
data class Item(val countray :String,val rate:String)

the getView in the custom spinner adapter inside the second fragment (I need my data here)

    override fun getView(p0: Int, p1: View?, p2: ViewGroup?): View {
    val view    = inflater.inflate(R.layout.custome_spinner,null)
    val img = view.findViewById<View>(R.id.spinner_image) as ImageView
    val countary_name     = view.findViewById<View>(R.id.spinner_country) as TextView
    img.setImageResource(R.drawable.us)
    countary_name.setText(country!![p0].countray)
    return view
}

Answer 1

1. Do you display two fragments in your Activity simultaneously? If so, you can pass the data through it. Or implement some interface/observable/livedata to pass the data between the fragments.

2. If Fragment A fetches the data and then you change Fragment A to Fragment B, make your data classes Parcelable and then pass it as arguments when creating Fragment B:

companion object {
    fun newInstance(yourData : DataClass) = FragmentB().apply { arguments = Bundle().apply {  putParcelable("dataKey",yourData) }
}

Note: you can annotate your data class with @Parcelize. Compiler will then generate all Parcelable methods and factory class for you.

After you passed the data to Fragment B on creation, retrieve it with, for example:

val data: YourData by lazy { arguments?.getParcelable("dataKey") as YourData }

Answer 2

Indeed it is possible to pass objects from one fragment to another given your object class should implement Parcelable. And passing the object through the bundle by calling putParcelable on the bundle object.

1. class CurrancyModel : Parcelable {
  //Implement Parcelable 
}

And pass it between the fragments via Bundle.

2.var fragment = YourFragment().apply {
   arguments = Bundle().apply{ putParcelable("dataKey",yourData) }
}