How to correctly use querySkuDetailsAsync?

Question

I am trying to use the billing library and I am getting info from the official Android Developer site here. But I am finding a lot of trouble. Mainly compiling problems. It looks like that documentation is not completed. When I started following step by step I had to search for a lot of extra information. Now I am stuck trying to do querySkuDetailsAsync() This is my code:

    billingClient = BillingClient.newBuilder(this).enablePendingPurchases().setListener(this).build();
    billingClient.startConnection(new BillingClientStateListener() {
        @Override
        public void onBillingSetupFinished(BillingResult billingResult) {
            if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK) {
                // The BillingClient is ready. You can query purchases here.
                List<String> skuList = new ArrayList<> ();
                skuList.add("sp_hide_ads_year_01");
                SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
                params.setSkusList(skuList).setType(BillingClient.SkuType.SUBS);

                billingClient.querySkuDetailsAsync(params.build(),
                        new SkuDetailsResponseListener() {
                            @Override
                            public void onSkuDetailsResponse(BillingResult billingResult, List<SkuDetails> skuDetailsList) {
                                //*** I want to Continue here ***
                            }
                        });
            }
        }
        @Override
        public void onBillingServiceDisconnected() {
            // Try to restart the connection on the next request to
            // Google Play by calling the startConnection() method.
        }
    });

The compiler (Android Studio) says:

'onSkuDetailsResponse(BillingResult, List)' in 'Anonymous class derived from com.android.billingclient.api.SkuDetailsResponseListener' clashes with 'onSkuDetailsResponse(BillingResult, List)' in 'com.android.billingclient.api.SkuDetailsResponseListener'; both methods have erasure, yet neither overrides the other

I have no idea what this means. any help here?

By the way, I use

implementation 'com.android.billingclient:billing:2.1.0'

Answer 1

I changed the line:

public void onSkuDetailsResponse(BillingResult billingResult, List<SkuDetails> skuDetailsList) 

for this one, and everything compiled:

public void onSkuDetailsResponse(BillingResult billingResult, List<com.android.billingclient.api.SkuDetails> skuDetailsList)