"lateinit property has not been initialized" exception when setting a list adapter-CodePudding

class MainActivity() : AppCompatActivity() {

   lateinit var tumBurcBilgileri: ArrayList<Burc>


    override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)

         var myBaseAdapter = BurclarBaseAdapter(this, tumBurcBilgileri)
         ListBurclar.adapter = myBaseAdapter
     }
     private fun veriKaynagiHazirla(){
         tumBurcBilgileri=ArrayList<Burc>(12)

         var burclar = resources.getStringArray(R.array.Burc)
         var BurcTarihleri = resources.getStringArray(R.array.burcTarih)
         var BurcResimleri = arrayOf(R.drawable.koc1, R.drawable.boga2, R.drawable.ikizler3,
             R.drawable.yengec4, R.drawable.aslan5,
             R.drawable.basak6,   R.drawable.terazi7, R.drawable.akrep8,
             R.drawable.yay9, R.drawable.oglak10, R.drawable.kova11,
             R.drawable.balik12)
        var BüyükBurcResim = arrayOf(R.drawable.koc_buyuk1, R.drawable.boga_buyuk2,
            R.drawable.ikizler_buyuk3, R.drawable.yengec_buyuk4, R.drawable.aslan_buyuk5,
            R.drawable.basak_buyuk6, R.drawable.terazi_buyuk7, R.drawable.akrep_buyuk8, R.drawable.yay_buyuk9,
            R.drawable.oglak_buyuk10, R.drawable.kova_buyuk11, R.drawable.balik_buyuk12)

         var burcGenelÖzellikler = resources.getStringArray(R.array.burcGenelOzellikler)

         for (i in 0..11){
             var arayListeAtanacakBurc=Burc(burclar[i], BurcTarihleri[i], BurcResimleri[i], BüyükBurcResim[i],
                 burcGenelÖzellikler[i])
             tumBurcBilgileri.add(arayListeAtanacakBurc)
         }
     }
 }

Logcat Log:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.burlar/com.example.burlar.MainActivity}: kotlin.UninitializedPropertyAccessException: lateinit property tumBurcBilgileri has not been initialized

CodePudding user response：

You are getting the error because you have to intitialise the tumBurcBilgileri in onCreate() method as you have used lateinit for the variable. You can put this:-

tumBurcBilgileri=ArrayList<Burc>(12)

in onCreate() method

CodePudding user response：

You are trying to access a lateinit properly before initializing it. Prepare the tumBurcBilgileri ArrayList before setting the adapter.

override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     setContentView(R.layout.activity_main)
 }
 private fun veriKaynagiHazirla(){
     tumBurcBilgileri=ArrayList<Burc>(12)

     var burclar = resources.getStringArray(R.array.Burc)
     var BurcTarihleri = resources.getStringArray(R.array.burcTarih)
     var BurcResimleri = arrayOf(R.drawable.koc1, R.drawable.boga2, R.drawable.ikizler3,
         R.drawable.yengec4, R.drawable.aslan5,
         R.drawable.basak6,   R.drawable.terazi7, R.drawable.akrep8,
         R.drawable.yay9, R.drawable.oglak10, R.drawable.kova11,
         R.drawable.balik12)
    var BüyükBurcResim = arrayOf(R.drawable.koc_buyuk1, R.drawable.boga_buyuk2,
        R.drawable.ikizler_buyuk3, R.drawable.yengec_buyuk4, R.drawable.aslan_buyuk5,
        R.drawable.basak_buyuk6, R.drawable.terazi_buyuk7, R.drawable.akrep_buyuk8, R.drawable.yay_buyuk9,
        R.drawable.oglak_buyuk10, R.drawable.kova_buyuk11, R.drawable.balik_buyuk12)

     var burcGenelÖzellikler = resources.getStringArray(R.array.burcGenelOzellikler)

     for (i in 0..11){
         var arayListeAtanacakBurc=Burc(burclar[i], BurcTarihleri[i], BurcResimleri[i], BüyükBurcResim[i],
             burcGenelÖzellikler[i])
         tumBurcBilgileri.add(arayListeAtanacakBurc)
     }
     
     // set the adapter after the **tumBurcBilgileri** ArrayList is ready.
     var myBaseAdapter = BurclarBaseAdapter(this, tumBurcBilgileri)
     ListBurclar.adapter = myBaseAdapter
 }

CodePudding user response：

You are not calling the function in the onCreate where the initialization of the lateinit variable is called.

In a lateinit variable you have to assign a value to it before you use it


lateinit var tumBurcBilgileri: ArrayList<Burc>


    override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         veriKaynagiHazirla() // call the function here
         var myBaseAdapter = BurclarBaseAdapter(this, tumBurcBilgileri)
         ListBurclar.adapter = myBaseAdapter
     }