إضافة خدمة الشراء داخل التطبيق باستخدام مكتبة com.android.billingclient:billing:$billing_version

استعملت هاذ المكتبة

ِimplementation "com.android.billingclient:billing:$billing_version

هاذي هي الاكواد التي استعملت

billingClient=BillingClient.newBuilder(this)
                .enablePendingPurchases()
                .setListener(new PurchasesUpdatedListener() {
                    @Override
                    public void onPurchasesUpdated(@NonNull BillingResult billingResult, @Nullable List<Purchase> list) {
                        if(billingResult.getResponseCode()==BillingClient.BillingResponseCode.OK&&list!=null){
                            for (Purchase purchase:list){
                                if (purchase.getPurchaseState()==Purchase.PurchaseState.PURCHASED&&
                                !purchase.isAcknowledged()){


                                }
                            }
                        }
                    }
                }).build();
        connectToGooglePlayBilling();

private void connectToGooglePlayBilling(){
        billingClient.startConnection(
                new BillingClientStateListener() {
                    @Override
                    public void onBillingServiceDisconnected() {
                        connectToGooglePlayBilling();
                    }

                    @Override
                    public void onBillingSetupFinished(@NonNull BillingResult billingResult) {
                        if (billingResult.getResponseCode()==BillingClient.BillingResponseCode.OK){
                            getProductDetails();
                            
                            
                        }
                    }
                }
        );
    }

    private void getProductDetails(){
        List<String> productId=new ArrayList<>();
        productId.add("by_product");

        SkuDetailsParams getProductDetailsQuery=SkuDetailsParams
                .newBuilder()
                .setSkusList(productId)
                .setType(BillingClient.SkuType.INAPP)
                .build();
        Activity activity=this;
        billingClient.querySkuDetailsAsync(
                getProductDetailsQuery, new SkuDetailsResponseListener() {
                    @Override
                    public void onSkuDetailsResponse(@NonNull BillingResult billingResult, @Nullable List<SkuDetails> list) {
                        if(billingResult.getResponseCode()==BillingClient.BillingResponseCode.OK&&
                        list!=null){
                            TextView itemNameTextView =findViewById(R.id.tv_shop);
                            Button itemPriceButton =findViewById(R.id.btn_shop);
                            SkuDetails itemInfo=list.get(0);
                            itemNameTextView.setText(itemInfo.getTitle());
                            itemPriceButton.setText(itemInfo.getPrice());
                            itemPriceButton.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View view) {
                                    billingClient.launchBillingFlow(
                                            activity, BillingFlowParams.newBuilder().setSkuDetails(itemInfo).build()
                                    );
                                }
                            });

                            
                        }
                    }
                }
        );
    }

ماهي الخطوات الناقصة مثل تاكيد المبيعة وكيف استخدم العنصر المسترى