此函数如何生成Java.Lang.NullPointerException?

这是Google Play报道的崩溃:

java.lang.NullPointerException异常:


3.访问com.raptisoft.SB.GameThread.run(未知)ource:2)

下面是它崩溃的函数:

Bundle mOwnedItems; // Filled elsewhere

private boolean IsPurchased(String theData)
{
    if (theData==null) return false;
    boolean aResult=false;
    if (mOwnedItems.size()>0) if (mOwnedItems.containsKey("RESPONSE_CODE"))
    {
        int response = mOwnedItems.getInt("RESPONSE_CODE");
        if (response == 0 && mOwnedItems.containsKey("INAPP_PURCHASE_ITEM_LIST"))
        {
            ArrayList<String> ownedSkus = new ArrayList<String>();
            ownedSkus = mOwnedItems.getStringArrayList("INAPP_PURCHASE_ITEM_LIST");
            if (ownedSkus!=null) {
                for (int i = 0; i < ownedSkus.size(); ++i) {
                    String sku = ownedSkus.get(i);
                    if (sku.equals(theData)) {
                        aResult = true;
                        break;
                    }
                }
            }
        }
    }
    return aResult;
}

…然后在本机代码中从该函数调用:

bool ToJava::IsPurchased(char* theData)
{
    if (theData==NULL) return false;

    JNIEnv* threadEnv=GetEnv();
    jstring aPassString = threadEnv->NewStringUTF(theData);
    jboolean aResult=threadEnv->CallBooleanMethod(g_theGlobalRefToActivityInstance,gIsPurchasedBridge,aPassString);
    threadEnv->DeleteLocalRef(aPassString);

    return (aResult!=0);
}

两周来,我一直在关注这个崩溃,为函数添加了越来越多的保护措施——但它仍然在发生。我只是在java中,因为我喜欢的语言是C++。有人能告诉我这个函数中什么是空的吗?