[android] Addded PurchaiseDetials class and callback

android/src/com/mapswithme/maps/purchase/Factory.java

@@ -4,6 +4,10 @@ import android.app.Activity;
 import android.support.annotation.NonNull;
 
 import com.android.billingclient.api.BillingClient;
+import com.android.billingclient.api.SkuDetails;
+
+import java.util.ArrayList;
+import java.util.List;
 
 public enum Factory
 {
@@ -29,4 +33,13 @@ public enum Factory
 
   @NonNull
   public abstract BillingManager createBillingManager(@NonNull Activity activity, @NonNull String productId);
+
+  @NonNull
+  static List<PurchaseDetails> createPurchaseDetailsFrom(@NonNull List<SkuDetails> skuDetails)
+  {
+    List<PurchaseDetails> details = new ArrayList<>(skuDetails.size());
+    for (SkuDetails skuDetail : skuDetails)
+      details.add(new PurchaseDetails(skuDetail));
+    return details;
+  }
 }

android/src/com/mapswithme/maps/purchase/PlayStoreBillingManager.java

@@ -159,8 +159,23 @@ public class PlayStoreBillingManager implements BillingManager<PlayStoreBillingC
     private void onSkuDetailsResponseInternal(@BillingResponse int responseCode,
                                               @Nullable List<SkuDetails> skuDetails)
     {
-      LOGGER.i(TAG, "Product details response, code: " + responseCode + ", " +
-                    "details: " + skuDetails);
+      LOGGER.i(TAG, "Purchase details response code: " + responseCode
+                    + ". Type: " + mProductType);
+      if (responseCode != BillingResponse.OK)
+      {
+        LOGGER.w(TAG, "Unsuccessful request");
+        return;
+      }
+
+      if (skuDetails == null || skuDetails.isEmpty())
+      {
+        LOGGER.w(TAG, "Purchase details not found");
+        return;
+      }
+
+      LOGGER.i(TAG, "Purchase details obtained: " + skuDetails);
+      if (mCallback != null)
+        mCallback.onPurchaseDetailsLoaded(Factory.createPurchaseDetailsFrom(skuDetails));
     }
   }
 }

android/src/com/mapswithme/maps/purchase/PurchaseDetails.java

@@ -1,5 +1,16 @@
 package com.mapswithme.maps.purchase;
 
-public class PurchaseDetails
+import android.support.annotation.NonNull;
+
+import com.android.billingclient.api.SkuDetails;
+
+class PurchaseDetails
 {
+  @NonNull
+  private final SkuDetails mDetails;
+
+  PurchaseDetails(@NonNull SkuDetails details)
+  {
+    mDetails = details;
+  }
 }