Apps get error kotlin null pointer exception when switching fragment

[anwartan]

I have given the error section with an underscore


import android.app.SearchManager
import android.content.Context
import android.os.Bundle
import android.util.Log
import android.view.*
import androidx.appcompat.widget.SearchView
import androidx.core.content.getSystemService
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout

import com.example.paduma.R
import com.example.paduma.model.DataApi
import com.example.paduma.model.Paritta
import com.example.paduma.network.ParittaApi
import com.example.paduma.network.RetrofitClientInstance
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response
import java.io.IOException

// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private const val ARG_PARAM1 = "param1"
private const val ARG_PARAM2 = "param2"

/**
* A simple [Fragment] subclass.
*
*/
class ParittaFragment : Fragment() {

companion object {
val INSTANCE_STATE = "INSTANCE_STATE"
}

override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
setHasOptionsMenu(true)
Log.d("life","createview")
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_paritta, container, false)
}

private lateinit var swipeRefreshLayout: SwipeRefreshLayout
private lateinit var recyclerView: RecyclerView
private lateinit var linearLayoutManager: LinearLayoutManager
private lateinit var parittaApi: ParittaApi
private lateinit var adapterParitta: AdapterParitta
private var dataParitta: ArrayList<Paritta.DataParitta>? = ArrayList()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
// if(savedInstanceState!=null) {
// if (savedInstanceState.getParcelableArrayList<Paritta.DataParitta>(INSTANCE_STATE) != null) {
// dataParitta = savedInstanceState.getParcelableArrayList(INSTANCE_STATE)!!
// setDataRecycler(dataParitta)
// }
// }else{
// loadRecyclerViewData()
//
// }
init(view)
Log.d("life","viewcreated")


}

override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
Log.d("life","activityCreated")

loadData()
}

private fun init(view: View) {
swipeRefreshLayout = view.findViewById(R.id.swipeLayout)
parittaApi = RetrofitClientInstance().getRetrofitInstance().create(ParittaApi::class.java)
recyclerView = view.findViewById(R.id.recycler_paritta)
linearLayoutManager = LinearLayoutManager(view.context)
recyclerView.layoutManager = linearLayoutManager


}


private fun loadData() {
swipeRefreshLayout.isRefreshing=true
val call = parittaApi.getAllParitta()
call.enqueue(object : Callback<Paritta> {
override fun onFailure(call: Call<Paritta>, t: Throwable) {

}

override fun onResponse(call: Call<Paritta>, response: Response<Paritta>) {
if (!response.isSuccessful) {
return
}
dataParitta = response.body()!!.data

adapterParitta =
AdapterParitta(dataParitta as ArrayList<DataApi>, R.layout.recycler_paritta, context!!)
recyclerView.adapter = adapterParitta
swipeRefreshLayout.isRefreshing=true

}

})
}

override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
inflater.inflate(R.menu.main_menu, menu)
val searchView = menu.findItem(R.id.action_search).actionView as SearchView
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String?): Boolean {
return false
}

override fun onQueryTextChange(newText: String?): Boolean {
adapterParitta.filter.filter(newText)
return false
}

})
super.onCreateOptionsMenu(menu, inflater)
}


// override fun onSaveInstanceState(outState: Bundle) {
// super.onSaveInstanceState(outState)
// outState.putParcelableArrayList(INSTANCE_STATE,dataParitta)
// }


}