In-app events

Overview

For an introduction to in-app events for developers, see In-app events.

Before you begin

Logging in-app events

The SDK lets you log user actions happening in the context of your app. These are commonly referred to as in-app events.

The `logEvent` method

The logEvent method lets you log in-app events and send them to AppsFlyer for processing.

To access the logEvent method, import AppsFlyerLib:

import com.appsflyer.AppsFlyerLib;

import com.appsflyer.AppsFlyerLib

To access predefined event constants, import AFInAppEventType and AFInAppEventParameterName:

import com.appsflyer.AFInAppEventType; // Predefined event names
import com.appsflyer.AFInAppEventParameterName; // Predefined parameter names

import com.appsflyer.AFInAppEventType // Predefined event names
import com.appsflyer.AFInAppEventParameterName // Predefined parameter names

logEvent takes 4 arguments:

void logEvent(Context context,
              java.lang.String eventName,
              java.util.Map<java.lang.String,java.lang.Object> eventValues,
              AppsFlyerRequestListener listener)

The first argument (context) is the Application/Activity Context
The second argument (eventName) is the In-app event name
The third argument (eventValues) is the event parameters Map
The fourth argument (listener) is an optional AppsFlyerRequestListener (useful for Handling event submission success/failure)

Example: Send "add to wishlist" event

For example, to log that a user added an item to their wishlist:

Map<String, Object> eventValues = new HashMap<String, Object>();
eventValues.put(AFInAppEventParameterName.PRICE, 1234.56);
eventValues.put(AFInAppEventParameterName.CONTENT_ID,"1234567");

AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    AFInAppEventType.ADD_TO_WISHLIST , eventValues);

val eventValues = HashMap<String, Any>() 
eventValues.put(AFInAppEventParameterName.PRICE, 1234.56)
eventValues.put(AFInAppEventParameterName.CONTENT_ID,"1234567")

AppsFlyerLib.getInstance().logEvent(getApplicationContext() ,
                                    AFInAppEventType.ADD_TO_WISHLIST , eventValues)

In the above logEvent invocation:

The event name is AFInAppEventType.ADD_TO_WISHLIST
The event value is a Map containing these event parameters:
- AFInAppEventParameterName.PRICE: The price that's associated with the event
- AFInAppEventParameterName.CONTENT_ID: The identifier of the added item

Implementing event structure definitions

Based on the example definition provided in Understanding event structure definitions, the event should be implemented as follows:

Map<String, Object> eventValues = new HashMap<String, Object>();
eventValues.put(AFInAppEventParameterName.PRICE, <ITEM_PRICE>);
eventValues.put(AFInAppEventParameterName.CONTENT_TYPE, <ITEM_TYPE>);
eventValues.put(AFInAppEventParameterName.CONTENT_ID, <ITEM_SKU>);

AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    AFInAppEventType.CONTENT_VIEW, eventValues);

val eventValues = HashMap<String, Any>() 
eventValues.put(AFInAppEventParameterName.PRICE, <ITEM_PRICE>)
eventValues.put(AFInAppEventParameterName.CONTENT_TYPE, <ITEM_TYPE>)
eventValues.put(AFInAppEventParameterName.CONTENT_ID, <ITEM_SKU>)

AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    AFInAppEventType.CONTENT_VIEW, eventValues)

Handling event submission success and failure

You can provide logEvent with a AppsFlyerRequestListener object when recording in-app events. The handler allows you to define logic for two scenarios:

An in-app event is recorded successfully
An error occurred when recording the in-app event

AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    AFInAppEventType.PURCHASE,
                                    eventValues,
                                    new AppsFlyerRequestListener() {
                    @Override
                    public void onSuccess() {
                        Log.d(LOG_TAG, "Event sent successfully");
                    }
                    @Override
                    public void onError(int i, @NonNull String s) {
                        Log.d(LOG_TAG, "Event failed to be sent:\n" +
                                "Error code: " + i + "\n"
                                + "Error description: " + s);
                    }
                });

AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    AFInAppEventType.PURCHASE,
                                    eventValues,
                                    object : AppsFlyerRequestListener {
            override fun onSuccess() {
                Log.d(LOG_TAG, "Event sent successfully")
            }
            override fun onError(errorCode: Int, errorDesc: String) {
                Log.d(LOG_TAG, "Event failed to be sent:\n" +
                        "Error code: " + errorCode + "\n"
                        + "Error description: " + errorDesc)
            }
        })

In the event that an error occurs when recording the in-app event, an error code and string description are provided, as indicated in the table that follows.

Error code	Description (NSError)
`10`	"Event timeout. Check 'minTimeBetweenSessions' param"
`11`	"Skipping event because 'isStopTracking' enabled"
`40`	Network error: Error description comes from Android
`41`	"No dev key"
`50`	"Status code failure" + actual response code from the server

Recording offline events

The SDK can record events that occur when no internet connection is available. See Offline in-app events for details.

Logging events before calling `start`

If you initialized the SDK but didn't call start, the SDK will cache in-app events until start is invoked.

If there are multiple events in the cache, they are sent to the server one after another (unbatched, one network request per event).

Logging revenue

You can send revenue with any in-app event. Use the AFInAppEventParameterName.REVENUE event parameter to include revenue in the in-app event. You can populate it with any numeric value, positive or negative.

The revenue value should not contain comma separators, currency signs, or text. A revenue event should be similar to 1234.56, for example.

Example: Purchase event with revenue

Map<String, Object> eventValues = new HashMap<String, Object>();
eventValues.put(AFInAppEventParameterName.CONTENT_ID, <ITEM_SKU>);
eventValues.put(AFInAppEventParameterName.CONTENT_TYPE, <ITEM_TYPE>);
eventValues.put(AFInAppEventParameterName.REVENUE, 200);

AppsFlyerLib.getInstance().logEvent(getApplicationContext(), 
                                    AFInAppEventType.PURCHASE, eventValues);

val eventValues = HashMap<String, Any>() 
eventValues.put(AFInAppEventParameterName.CONTENT_ID, <ITEM_SKU>)
eventValues.put(AFInAppEventParameterName.CONTENT_TYPE, <ITEM_TYPE>)
eventValues.put(AFInAppEventParameterName.REVENUE, 200)

AppsFlyerLib.getInstance().logEvent(getApplicationContext(), 
                                    AFInAppEventType.PURCHASE, eventValues)

The purchase event above has $200 in revenue, appearing as revenue in the dashboard.

📘
Note
Do not add currency symbols to the revenue value.

Configuring revenue currency

You can set the currency code for an event's revenue by using the af_currency predefined event parameter:

Map<String, Object> eventValues = new HashMap<String, Object>();
eventValues.put(AFInAppEventParameterName.CURRENCY, "USD");
eventValues.put(AFInAppEventParameterName.REVENUE, <TRANSACTION_REVENUE>);
AppsFlyerLib.getInstance().logEvent(getApplicationContext(), 
                                    AFInAppEventType.PURCHASE, eventValues);

val eventValues = HashMap<String, Any>() 
eventValues.put(AFInAppEventParameterName.REVENUE, <TRANSACTION_REVENUE>)
eventValues.put(AFInAppEventParameterName.CURRENCY,"USD")
AppsFlyerLib.getInstance().logEvent(getApplicationContext() , AFInAppEventType.PURCHASE , eventValues)

The currency code should be a 3 character ISO 4217 code
The default currency is USD

To learn about currency settings, display, and currency conversion, see our guide on revenue currency.

Logging negative revenue

There may be situations where you want to record negative revenue. For example, a user receives a refund or cancels a subscription.

To log negative revenue:

Map<String, Object> eventValues = new HashMap<String, Object>();
eventValues.put(AFInAppEventParameterName.REVENUE, -1234.56);
eventValues.put(AFInAppEventParameterName.CONTENT_ID,"1234567");
AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    "cancel_purchase",
                                    eventValues);

val eventValues = HashMap<String, Any>() 
eventValues.put(AFInAppEventParameterName.REVENUE, -1234.56)
eventValues.put(AFInAppEventParameterName.CONTENT_ID,"1234567")
AppsFlyerLib.getInstance().logEvent(getApplicationContext(),
                                    "cancel_purchase",
                                    eventValues)

📘
Note
Notice the following in the code above:

The revenue value is preceded by a minus sign

The event name is a custom event name called "cancel_purchase" - it helps you easily identify negative revenue events in the dashboard and raw data reports

Validating purchases

AppsFlyer provides server verification for in-app purchases. The validateAndLogInAppPurchase method takes care of validating and logging the purchase event.

📘
Note
The legacy function validateAndLogInAppPurchase can be replaced by the newer and fully automatic purchase SDK connector. To learn how to integrate the connector, see in Github Android purchase SDK connector

The `validateAndLogInAppPurchase` method

validateAndLogInAppPurchase is exposed via AppsFlyerLib.

validateAndLognInAppPurchase takes these arguments:

validateAndLogInAppPurchase(Context context,
                            java.lang.String publicKey,
                            java.lang.String signature,
                            java.lang.String purchaseData,
                            java.lang.String price, java.lang.String currency,
                            java.util.Map<java.lang.String,java.lang.String> additionalParameters)

context: Application / Activity context
publicKey: License Key obtained from the Google Play Console
signature: data.INAPP_DATA_SIGNATURE from onActivityResult
purchaseData: data.INAPP_PURCHASE_DATA from onActivityResult
price: Purchase price, should be derived from skuDetails.getStringArrayList("DETAILS_LIST")
currency: Purchase currency, should be derived from skuDetails.getStringArrayList("DETAILS_LIST")
additionalParameters - Additional event parameters to log

If the validation is successful, an af_purchase event is logged with the values provided to validateAndLogInAppPurchase.

📘
Note
validateAndLogInAppPurchase generates an af_purchase in-app event upon successful validation. Sending this event yourself will cause duplicate event reporting.

Example: Validate an in-app purchase

// Purchase object is returned by Google API in onPurchasesUpdated() callback
private void handlePurchase(Purchase purchase) {
    Log.d(LOG_TAG, "Purchase successful!");
    Map<String, String> eventValues = new HashMap<>();
    eventValues.put("some_parameter", "some_value");
    AppsFlyerLib.getInstance().validateAndLogInAppPurchase(getApplicationContext(),
                                                           PUBLIC_KEY,
                                                           purchase.getSignature(),
                                                           purchase.getOriginalJson(),
                                                           "10",
                                                           "USD",
                                                           eventValues);
}

// Purchase object is returned by Google API in onPurchasesUpdated() callback
private fun handlePurchase(Purchase purchase) {
   Log.d(LOG_TAG, "Purchase successful!")
   val eventValues = HashMap<String, String>()
   eventValues.put("some_parameter", "some_value")
   AppsFlyerLib.getInstance().validateAndLogInAppPurchase(this,
                                                          PUBLIC_KEY,
                                                          purchase.getSignature(),
                                                          purchase.getOriginalJson(),
                                                          "10",
                                                          "USD",
                                                          eventValues)
}

Handling purchase validation success/failure

use AppsFlyerInAppPurchaseValidatorListener to subscribe to purchase validation successes/failures and registerValidatorListener to register it in your Application class.

registerValidatorListener is exposed via AppsFlyerLib. To use AppsFlyerInAppPurchaseValidatorListener, import it:

import com.appsflyer.AppsFlyerInAppPurchaseValidatorListener;

import com.appsflyer.AppsFlyerInAppPurchaseValidatorListener

AppsFlyerInAppPurchaseValidatorListener has two callbacks:

onValidateInApp: Triggered upon successful purchase validation
onValidateInAppFailure: Triggered upon failed purchase validations

registerValidatorListener takes 2 arguments:

context: The Application Context
validationListener: The AppsFlyerInAppPurchaseValidatorListener object you wish to register

AppsFlyerLib.getInstance().registerValidatorListener(this,new
   AppsFlyerInAppPurchaseValidatorListener() {
     public void onValidateInApp() {
       Log.d(TAG, "Purchase validated successfully");
     }
     public void onValidateInAppFailure(String error) {
       Log.d(TAG, "onValidateInAppFailure called: " + error);
     }
});

AppsFlyerLib.getInstance().registerValidatorListener(this, object : AppsFlyerInAppPurchaseValidatorListener {
    override fun onValidateInApp() {
       	Log.d(LOG_TAG, "Purchase validated successfully")
    }

    override fun onValidateInAppFailure(error: String) {
        Log.d(LOG_TAG, "onValidateInAppFailure called: $error")
   }
})

Validating an in-app purchase automatically sends an in-app purchase event to AppsFlyer. See the following sample data that is passed in the event_value parameter:

{
   "some_parameter": "some_value", // from additional_event_values
   "af_currency": "USD", // from currency
   "af_content_id" :"test_id", // from purchase
   "af_revenue": "10", // from revenue
   "af_quantity": "1", // from purchase
   "af_validated": true // flag that AF verified the purchase
}

Event constants

Predefined event names

To use the following constants, import com.appsflyer.AFInAppEventType:

import com.appsflyer.AFInAppEventType;

import com.appsflyer.AFInAppEventType

Predefined event name constants follow a AFInAppEventType.EVENT_NAME naming convention. For example, AFInAppEventType.ADD_TO_CART

Event name	Android constant name
`"af_level_achieved"`	`AFInAppEventType.LEVEL_ACHIEVED`
`"af_add_payment_info"`	`AFInAppEventType.ADD_PAYMENT_INFO`
`"af_add_to_cart"`	`AFInAppEventType.ADD_TO_CART`
`"af_add_to_wishlist"`	`AFInAppEventType.ADD_TO_WISHLIST`
`"af_complete_registration"`	`AFInAppEventType.COMPLETE_REGISTRATION`
`"af_tutorial_completion"`	`AFInAppEventType.TUTORIAL_COMPLETION`
`"af_initiated_checkout"`	`AFInAppEventType.INITIATED_CHECKOUT`
`"af_purchase"`	`AFInAppEventType.PURCHASE`
`"af_rate"`	`AFInAppEventType.RATE`
`"af_search"`	`AFInAppEventType.SEARCH`
`"af_spent_credits"`	`AFInAppEventType.SPENT_CREDITS`
`"af_achievement_unlocked"`	`AFInAppEventType.ACHIEVEMENT_UNLOCKED`
`"af_content_view"`	`AFInAppEventType.CONTENT_VIEW`
`"af_list_view"`	`AFInAppEventType.LIST_VIEW`
`"af_travel_booking"`	`AFInAppEventType.TRAVEL_BOOKING`
`"af_share"`	`AFInAppEventType.SHARE`
`"af_invite"`	`AFInAppEventType.INVITE`
`"af_login"`	`AFInAppEventType.LOGIN`
`"af_re_engage"`	`AFInAppEventType.RE_ENGAGE`
`"af_update"`	`AFInAppEventType.UPDATE`
`"af_location_coordinates"`	`AFInAppEventType.LOCATION_COORDINATES`
`"af_customer_segment"`	`AFInAppEventType.CUSTOMER_SEGMENT`
`"af_subscribe"`	`AFInAppEventType.SUBSCRIBE`
`"af_start_trial"`	`AFInAppEventType.START_TRIAL`
`"af_ad_click"`	`AFInAppEventType.AD_CLICK`
`"af_ad_view"`	`AFInAppEventType.AD_VIEW`
`"af_opened_from_push_notification"`	`AFInAppEventType.OPENED_FROM_PUSH_NOTIFICATION`

Predefined event parameters

To use the following constants, import AFInAppEventParameterName:

import com.appsflyer.AFInAppEventParameterName;

import com.appsflyer.AFInAppEventParameterName

Predefined event parameter constants follow a AFInAppEventParameterName.PARAMETER_NAME naming convention. For example, AFInAppEventParameterName.CURRENCY

Event parameter name	Android constant name	Type
`"af_content"`	`CONTENT`	`String[]`
`"af_achievement_id"`	`ACHIEVEMENT_ID`	`String`
`"af_level"`	`LEVEL`	`String`
`"af_score"`	`SCORE`	`String`
`"af_success"`	`SUCCESS`	`String`
`"af_price"`	`PRICE`	`float`
`"af_content_type"`	`CONTENT_TYPE`	`String`
`"af_content_id"`	`CONTENT_ID`	`String`
`"af_content_list"`	`CONTENT_LIST`	`String[]`
`"af_currency"`	`CURRENCY`	`String`
`"af_quantity"`	`QUANTITY`	`int`
`"af_registration_method"`	`REGISTRATION_METHOD`	`String`
`"af_payment_info_available"`	`PAYMENT_INFO_AVAILABLE`	`String`
`"af_max_rating_value"`	`MAX_RATING_VALUE`	`String`
`"af_rating_value"`	`RATING_VALUE`	`String`
`"af_search_string"`	`SEARCH_STRING`	`String`
`"af_date_a"`	`DATE_A`	`String`
`"af_date_b"`	`DATE_B`	`String`
`"af_destination_a"`	`DESTINATION_A`	`String`
`"af_destination_b"`	`DESTINATION_B`	`String`
`"af_description"`	`DESCRIPTION`	`String`
`"af_class"`	`CLASS`	`String`
`"af_event_start"`	`EVENT_START`	`String`
`"af_event_end"`	`EVENT_END`	`String`
`"af_lat"`	`LAT`	`String`
`"af_long"`	`LONG`	`String`
`"af_customer_user_id"`	`CUSTOMER_USER_ID`	`String`
`"af_validated"`	`VALIDATED`	`boolean`
`"af_revenue"`	`REVENUE`	`float`
`"af_projected_revenue"`	`PROJECTED_REVENUE`	`float`
`"af_receipt_id"`	`RECEIPT_ID`	`String`
`"af_tutorial_id"`	`TUTORIAL_ID`	`String`
`"af_virtual_currency_name"`	`VIRTUAL_CURRENCY_NAME`	`String`
`"af_deep_link"`	`DEEP_LINK`	`String`
`"af_old_version"`	`OLD_VERSION`	`String`
`"af_new_version"`	`NEW_VERSION`	`String`
`"af_review_text"`	`REVIEW_TEXT`	`String`
`"af_coupon_code"`	`COUPON_CODE`	`String`
`"af_order_id"`	`ORDER_ID`	`String`
`"af_param_1"`	`PARAM_1`	`String`
`"af_param_2"`	`PARAM_2`	`String`
`"af_param_3"`	`PARAM_3`	`String`
`"af_param_4"`	`PARAM_4`	`String`
`"af_param_5"`	`PARAM_5`	`String`
`"af_param_6"`	`PARAM_6`	`String`
`"af_param_7"`	`PARAM_7`	`String`
`"af_param_8"`	`PARAM_8`	`String`
`"af_param_9"`	`PARAM_9`	`String`
`"af_param_10"`	`PARAM_10`	`String`
`"af_departing_departure_date"`	`DEPARTING_DEPARTURE_DATE`	`String`
`"af_returning_departure_date"`	`RETURNING_DEPARTURE_DATE`	`String`
`"af_destination_list"`	`DESTINATION_LIST`	`String[]`
`"af_city"`	`CITY`	`String`
`"af_region"`	`REGION`	`String`
`"af_country"`	`COUNTRY`	`String`
`"af_departing_arrival_date"`	`DEPARTING_ARRIVAL_DATE`	`String`
`"af_returning_arrival_date"`	`RETURNING_ARRIVAL_DATE`	`String`
`"af_suggested_destinations"`	`SUGGESTED_DESTINATIONS`	`String[]`
`"af_travel_start"`	`TRAVEL_START`	`String`
`"af_travel_end"`	`TRAVEL_END`	`String`
`"af_num_adults"`	`NUM_ADULTS`	`String`
`"af_num_children"`	`NUM_CHILDREN`	`String`
`"af_num_infants"`	`NUM_INFANTS`	`String`
`"af_suggested_hotels"`	`SUGGESTED_HOTELS`	`String[]`
`"af_user_score"`	`USER_SCORE`	`String`
`"af_hotel_score"`	`HOTEL_SCORE`	`String`
`"af_purchase_currency"`	`PURCHASE_CURRENCY`	`String`
`"af_preferred_neighborhoods"`	`PREFERRED_NEIGHBORHOODS`	`String[]`
`"af_preferred_num_stops"`	`PREFERRED_NUM_STOPS`	`String`
`"af_adrev_ad_type"`	`AD_REVENUE_AD_TYPE`	`String`
`"af_adrev_network_name"`	`AD_REVENUE_NETWORK_NAME`	`String`
`"af_adrev_placement_id"`	`AD_REVENUE_PLACEMENT_ID`	`String`
`"af_adrev_ad_size"`	`AD_REVENUE_AD_SIZE`	`String`
`"af_adrev_mediated_network_name"`	`AD_REVENUE_MEDIATED_NETWORK_NAME`	`String`
`"af_preferred_price_range"`	`PREFERRED_PRICE_RANGE`	`String`, int tuple formatted as `(min,max)`
`"af_preferred_star_ratings"`	`PREFERRED_STAR_RATINGS`	`String`, int tuple formatted as `(min,max)`

Overview

Before you begin

Logging in-app events

The logEvent method

Example: Send "add to wishlist" event

Implementing event structure definitions

Handling event submission success and failure

Recording offline events

Logging events before calling start

Logging revenue

Example: Purchase event with revenue

Configuring revenue currency

Logging negative revenue

Validating purchases

The validateAndLogInAppPurchase method

Example: Validate an in-app purchase

Handling purchase validation success/failure

Event constants

Predefined event names

Predefined event parameters

The `logEvent` method

Logging events before calling `start`

The `validateAndLogInAppPurchase` method