// Products can be instrumented as an array of items that can be added to prescribed ecommerce events. 
 
//Log add_payment_info when a user submits their payment information. If applicable, include payment_type with this event for the chosen method of payment.
 
// A pair of jeggings (product1)
Bundle itemJeggings = new Bundle();
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_ID, "SKU_123");                     //Item ID (context-specific) (String). 
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_NAME, "jeggings");                  //Item Name (context-specific) (String). 
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_CATEGORY, "pants");                 //Item category (context-specific) (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_CATEGORY2, "sub-cat1");             //Item sub-category (context-specific) (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_CATEGORY3, "sub-cat2");             //Item sub-category (context-specific) (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_CATEGORY4, "sub-cat3");             //Item sub-category (context-specific) (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_CATEGORY5, "sub-cat4");             //Item sub-category (context-specific) (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_VARIANT, "black");                  //Item variant (String).
itemJeggings.putString(FirebaseAnalytics.Param.ITEM_BRAND, "Google");                   //Item brand. The parameter expects a string value
itemJeggings.putDouble(FirebaseAnalytics.Param.PRICE, 9.99);                            //Product price (double). Expecting a double value

// Prepare payment params
Bundle addPaymentParams = new Bundle();
addPaymentParams.putString(FirebaseAnalytics.Param.CURRENCY, "USD");
addPaymentParams.putDouble(FirebaseAnalytics.Param.VALUE, 14.98);
addPaymentParams.putString(FirebaseAnalytics.Param.COUPON, "SUMMER_FUN");
addPaymentParams.putString(FirebaseAnalytics.Param.PAYMENT_TYPE, "Visa");				//The chosen method of payment for example Visa, Payment on Delivery etc (String)

// Add items
addPaymentParams.putParcelableArray(FirebaseAnalytics.Param.ITEMS,
        new Parcelable[]{ itemJeggingsCart });

// Log added payment info event
analytics.logEvent(FirebaseAnalytics.Event.ADD_PAYMENT_INFO, addPaymentParams);