IAP error NullReferenceException: Object reference not set to an instance of an object

Question

using System; using System.Collections.Generic; using UnityEngine; using UnityEngine.Purchasing;

public class IapManager : MonoBehaviour, IStoreListener { public static IapManager Instance { set; get; } public main gameMgrs; private static IStoreController m_StoreController; private static IExtensionProvider m_StoreExtensionProvider;

 public const string productId10 = "marble_10_kor";
 void Start()
 {
     if (m_StoreController == null)
     {
         InitializePurchasing();
     }
 }

 public void InitializePurchasing()
 {
     if (IsInitialized())
     {
         return;
     }
     var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());

     builder.AddProduct(productId10, ProductType.Consumable);
  
     UnityPurchasing.Initialize(this, builder);
 }


 private bool IsInitialized()
 {
     return m_StoreController != null && m_StoreExtensionProvider != null;
 }


 public void Buy1()
 {
     BuyProductID(productId10);
 }
 
 public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs args)
 {
     Debug.Log(string.Format("ProcessPurchase: PASS. Product: '{0}'", args.purchasedProduct.definition.id));

     switch (args.purchasedProduct.definition.id)
     {
         case productId10:

             Debug.Log("10개 구매완료");
             gameMgrs.cash1();
             break;
     }

     return PurchaseProcessingResult.Complete;
 }

public void buy1() { Debug.Log(1); IapManager.Instance.Buy1(); Debug.Log(2); } Debug 1

I want use IAP. but have some error
NullReferenceException: Object reference not set to an instance of an object

Did I do something wrong?

Answer 1

Answer by JimmyHo · May 19, 2017 at 02:48 PM

I also encounter this problem on android. My unity version is 5.5.0f3.. Anyone help?

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caox · May 21, 2017 at 12:41 PM 0

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I find sollution!!

void Awake() { Instance = this; } plus this code

Answer 2

Answer by tangyinglin0228 · Apr 09, 2020 at 04:21 PM

The tutorial is confusing. I just came into the same problem today. After researching and looking around the whole day. I could finally figure out what's wrong. m_StoreController is indeed not initialized until the IStoreListener method returns it.

     public void OnInitialized(IStoreController controller, IExtensionProvider extensions) {
        m_StoreController = controller;
       }

These 3 lines of code should be put into awake as well or they would never be called and thus m_StoreController will never get initialized.

  var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());
  builder.AddProduct(productId10, ProductType.Consumable);
  UnityPurchasing.Initialize(this, builder);

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IAP error NullReferenceException: Object reference not set to an instance of an object

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