Return a List

[Pavitra]

I am using Anjlab's In App Billing library and was implementing this instruction to get details of multiple product IDs.

When I compile this extension, there is always an error saying the List<String> cannot be converted to YailList. Please help me how to make it work? I don't know how to return a YailList.

The error that has been shown 

error: incompatible types: List<String> cannot be converted to YailList
    [javac]               GotProductDetails(listOfProductDetails);

This is method that returns a List via an event.

 @SimpleFunction(description="Get Product Details.")
  public void ProductDetails(ArrayList<String> listOfProductIds) {  
    List<SkuDetails> sku = bp.getPurchaseListingDetails(listOfProductIds);
 
  if (sku != null) {
  List<String> listOfProductDetails = new ArrayList<String>();
   for(SkuDetails item : sku) {
 listOfProductDetails.add(item.productId + "," + item.title + "," + item.description + "," + item.priceText);
 }


  GotProductDetails(listOfProductDetails);
 }
// Log.d(LOG_TAG, "ProductDetails: " + productId);
  }

And the event code is

  @SimpleEvent(description = "Got Product Details")
  public void GotProductDetails(List<String> details){
    EventDispatcher.dispatchEvent(this, "GotProductDetails", details);
  }

[Pavitra]

But this code works

@Override
            public void onPurchaseHistoryRestored() {
 List<String> ownedProducts = new ArrayList<String>();
 List<String> ownedSubscriptions = new ArrayList<String>();
 
                if (bp.listOwnedProducts() != null) {
 for(String sku : bp.listOwnedProducts()) {
 ownedProducts.add(sku);
 }
 }
 
 if (bp.listOwnedSubscriptions() != null) {
                for(String subs : bp.listOwnedSubscriptions()) {
 ownedSubscriptions.add(subs);
 }
 }
 
 GotOwnedPurchases(ownedProducts, ownedSubscriptions);
            }

And its event code

@SimpleEvent(description = "Got Owned Purchases")
  public void GotOwnedPurchases(List<String> ownedProducts, List<String> ownedSubscriptions){
    EventDispatcher.dispatchEvent(this, "GotOwnedPurchases", ownedProducts, ownedSubscriptions);
  }

[Hal Abelson]

Look at appinventor/components/runtime/util/YailList.java and the MakeList method at line 70.