DataState.ordinal()' on a null object reference - kotlin

Question

I get null on object reference. I have a default value set(not sure if this has an effect). My DataState is in a Arraylist which is shown in a Recyclerview. Datastate is changed when a button is clicked and reflect on a textview.
My datestate class:
enum class DataState {
Unselected,
Success,
Failure
}
My Arraylist:
class Tripsheetlist (var videos: ArrayList<DataModel>)
class DataModel(
var Tripsheet: Int,
var WOrder: Int,
var DElNote: Int,
var name: String,
var Weight: Int,
var tvdone: String,
var Drivers: String,
var state: DataState = DataState.Unselected
)
My Adapter:
if ( rowPos != 0){
val modal = tripsheetlist.videos[rowPos -1]
holder.txttvdone.apply {
setBackgroundResource(when (modal.state) {
DataState.Unselected -> android.R.color.transparent
DataState.Success -> R.color.green
DataState.Failure -> R.color.orange
})
text = when (modal.state) {
DataState.Unselected -> ""
DataState.Success -> "✓"
DataState.Failure -> "x"
//this is where I add code to export data through api maybe add it in the datastate set where it is success and Failure
}
}
holder.apply {
txtbutton1.setOnClickListener {
Log.e("Clicked", "Successful delivery")
//this is where I add code to export data through api
modal.state = DataState.Success
notifyDataSetChanged()
}
txtbutton2.setOnClickListener {
Log.e("Clicked", "Exception on delivery")
modal.state = DataState.Failure
notifyDataSetChanged()
}
}}
I get the error on the line setBackgroundResource(when (modal.state) {
Error :
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.dispatch.tripsheet, PID: 12935
java.lang.NullPointerException: Attempt to invoke virtual method 'int com.dispatch.tripsheet.DataState.ordinal()' on a null object reference
at com.dispatch.tripsheet.TableViewAdapter.onBindViewHolder(TableViewAdapter.kt:162)
at com.dispatch.tripsheet.TableViewAdapter.onBindViewHolder(TableViewAdapter.kt:12)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7254)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7337)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6194)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6460)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6300)
Below will be my full adapter and Main class.
Adapter:
package com.dispatch.tripsheet
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.*
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.table_list_item.view.*
class TableViewAdapter(
var tripsheetlist: Tripsheetlist,
val driver: String,
var tvHeader: TextView,
val spnDriver: Spinner,
var adapter: ArrayAdapter<String>,
) : RecyclerView.Adapter<TableViewAdapter.RowViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RowViewHolder {
val itemView = LayoutInflater.from(parent.context).inflate(R.layout.table_list_item, parent, false)
var i: Int = 0
var totT: Int = 1
var a: Int = 0
var b: Int = 0
var c: Int = 0
var l: Int = tripsheetlist.videos.size -1
while (i <= l){
if (driver == tripsheetlist.videos[i].Drivers) {
if (a == 0){
a = tripsheetlist.videos[i].Tripsheet}
totT = totT
if(a != tripsheetlist.videos[i].Tripsheet) {
if (b == 0){
b = tripsheetlist.videos[i].Tripsheet}
if ( totT != 3){
totT = 2}
if(b != tripsheetlist.videos[i].Tripsheet) {
c = tripsheetlist.videos[i].Tripsheet
totT = 3
}
}
}
i++
}
when (totT)
{
1 -> tvHeader.setText("Vulcan Steel Trip Sheet: " +a)
2-> tvHeader.setText("Vulcan Steel Trip Sheet: " + a + " & " + b )
3-> tvHeader.setText("Vulcan Steel Trip Sheet: " + a + " & " + b + " & " + c)
else -> tvHeader.setText("Vulcan Steel Trip Sheets")
}
var h =0
// val driverList = tripsheetlist?.videos.distinctBy { it.Drivers }
// while (h <= driverList.size){
// adapter.add(driverList[h].Drivers.toString())
// h++
// }
//used for testing until we have driver data
while (h <= 4){
adapter.add("driverList[h].Drivers.toString()"+h)
h++
}
spnDriver.adapter = adapter
return RowViewHolder(itemView) }
private fun updateData(data: ArrayList<DataModel>) {
tripsheetlist.videos = data
notifyDataSetChanged()
}
override fun getItemCount(): Int { return tripsheetlist.videos.size + 1 // one more to add header row
}
override fun onBindViewHolder(holder: RowViewHolder, position: Int) {
val rowPos = holder.adapterPosition
if (rowPos == 0) {
holder.itemView.apply {
setHeaderBg(txtWOrder)
setHeaderBg(txtDElNote)
setHeaderBg(txtCompany)
setHeaderBg(txtWeight)
setHeaderBg(txttvdone)
txtWOrder.text = "WOrder"
txtDElNote.text = "DElNote"
txtCompany.text = "Compan"
txtWeight.text = "Weight"
txttvdone.text = "?"
}
} else {
val modal = tripsheetlist.videos[rowPos -1]
holder.itemView.apply {
setContentBg(txtWOrder)
setContentBg(txtDElNote)
setContentBg(txtCompany)
setContentBg(txtWeight)
txtWOrder.text = modal.WOrder.toString()
txtDElNote.text = modal.DElNote.toString()
txtCompany.text = modal.name //company
txtWeight.text = modal.Weight.toString()
// used when we have driver data
// if (modal.Drivers == driver) {
// txtWOrder.text = modal.WOrder.toString()
// txtDElNote.text = modal.DElNote.toString()
// txtCompany.text = modal.name
// txtWeight.text = modal.Weight.toString()
//
// }
}
}
//used for testing to look in concsole for responeses - all return null
// println(tripsheetlist.videos[rowPos ].name) //name needs to be chagned to company
// println("where we need to see the state")
// println("-1")
// println(tripsheetlist.videos[rowPos ].state)
// println("0")
// println(tripsheetlist.videos[0].state)
// println("+1")
// println(tripsheetlist.videos[1 ].state)
var p = tripsheetlist.videos[1].state
println("state")
println(p)
if ( rowPos != 0){
val modal = tripsheetlist.videos[rowPos -1]
holder.txttvdone.apply {
setBackgroundResource(when (modal.state) {
DataState.Unselected -> android.R.color.transparent
DataState.Success -> R.color.green
DataState.Failure -> R.color.orange
})
text = when (modal.state) {
DataState.Unselected -> ""
DataState.Success -> "✓"
DataState.Failure -> "x"
//this is where I add code to export data through api maybe add it in the datastate set where it is success and Failure
}
}
holder.apply {
txtbutton1.setOnClickListener {
Log.e("Clicked", "Successful delivery")
//this is where I add code to export data through api
modal.state = DataState.Success
notifyDataSetChanged()
}
txtbutton2.setOnClickListener {
Log.e("Clicked", "Exception on delivery")
modal.state = DataState.Failure
notifyDataSetChanged()
}
}}
}
class RowViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView){
val txttvdone:TextView = itemView.findViewById<TextView>(R.id.txttvdone)
val txtbutton1:Button = itemView.findViewById<Button>(R.id.txtbutton1)
val txtbutton2:Button = itemView.findViewById<Button>(R.id.txtbutton2)
}
private fun setHeaderBg(view: View) {
view.setBackgroundResource(R.drawable.table_header_cell_bg)
}
private fun setContentBg(view: View) {
view.setBackgroundResource(R.drawable.table_content_cell_bg)
}
}
Main class:
package com.dispatch.tripsheet
import android.os.Bundle
import android.view.View
import android.widget.*
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import com.google.gson.GsonBuilder
import kotlinx.android.synthetic.main.activity_main.*
import okhttp3.*
import java.io.IOException
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
recyclerViewTripsheetlist.layoutManager = LinearLayoutManager(this)
val spnDriver: Spinner = findViewById(R.id.spnDriver)
var adapter = ArrayAdapter<String>(this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item)
fetchJson( adapter, spnDriver)
}
private fun fetchJson(adapter: ArrayAdapter<String>, spnDriver: Spinner){
println("Attempting to Fetch JSON")
val url = "https://api.letsbuildthatapp.com/youtube/home_feed"
val request = Request.Builder().url(url).build()
val client = OkHttpClient()
client.newCall(request).enqueue(object: Callback {
override fun onFailure(call: Call, e: IOException) {
println("Failed to execute request") }
override fun onResponse(call: Call, response: Response) {
val body = response.body?.string()
println(body)
val gson = GsonBuilder().create()
val tripsheetlist = gson.fromJson(body, Tripsheetlist::class.java)
//remove the following later
tripsheetlist.videos.apply {
add(DataModel(190617, 182832, 1, "100",20, "Delivery not done",""))
add(DataModel(190616, 182833, 2, "100",10, "Exceptions",""))
add(DataModel(190616, 182832, 3, "100",100, "50%",""))
}
weightsum(tvTotalweight, tripsheetlist)
totaldelNotes(tvTotaldelv,tripsheetlist)
var driver : String = Spinner(tripsheetlist, adapter)
runOnUiThread {
recyclerViewTripsheetlist.adapter = TableViewAdapter(tripsheetlist, driver, tvHeader, spnDriver, adapter)
}
}
})
}
private fun Spinner(tripsheetlist: Tripsheetlist, adapter: ArrayAdapter<String>): String {
var driver : String = ""
var item : String = ""
var rowTot : Int = tripsheetlist?.videos.size
spnDriver.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{
override fun onItemSelected(p0: AdapterView<*>?, p1: View?, p2: Int, p3: Long) {
var rowPos : Int = 0
while (rowPos != rowTot){
//check which one of the following works
// item = tripsheetlist.videos[p2].Drivers.toString()
item = p2.toString()
rowPos = rowTot
}
Toast.makeText(this#MainActivity, "Driver $item selected", Toast.LENGTH_SHORT).show()
driver = item
}
override fun onNothingSelected(p0: AdapterView<*>?) {
driver = ""
//empty
}
}
return driver
}
private fun totaldelNotes(tvTotaldelv: TextView, tripsheetlist: Tripsheetlist) {
var totnotes :Int = tripsheetlist.videos.size
tvTotaldelv.setText("Total Delivery Notes: " +totnotes) }
private fun weightsum(tvTotalweight: TextView, tripsheetlist: Tripsheetlist) {
var totweight: Int = 0
var sum: Int = 0
for (i in 0 until tripsheetlist.videos.size) {
sum += tripsheetlist.videos[i].Weight }
totweight = sum
tvTotalweight.setText("Total Weight: " + totweight + "kg")
}
//not used
fun limitDropDownHeight(spinner: Spinner){
val popup = Spinner::class.java.getDeclaredField( "mPopup")
popup.isAccessible = true
val popupWindow = popup.get(spinner)as ListPopupWindow
popupWindow.height = (200 * resources.displayMetrics.density).toInt()
}
}