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Send event information

The Adjust SDK provides an AdjustEvent object which can be used to structure and send event information from your app to Adjust’s servers.

Instantiate an AdjustEvent object

Method signature
AdjustEvent(string eventToken)

To send event information with the Adjust SDK, you need to instantiate an AdjustEvent object. This object contains variables that are sent to Adjust when an event occurs in your app.

To instantiate an event object, create a new AdjustEvent instance and pass the following parameters:

AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
Adjust.trackEvent(myAdjustEvent);

Send an event

Method signature
static void trackEvent(AdjustEvent event)

You can associate your Adjust event tokens to actions in your app to record them. To record an event:

  • Create a new Adjust event instance and pass your event token as a string argument.
  • Call the trackEvent method with your event instance as an argument.
AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
Adjust.trackEvent(myAdjustEvent);

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button.

util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_SIMPLE = 'g3mfiw';


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent myAdjustEvent() {
      return new AdjustEvent(EVENT_TOKEN_SIMPLE);
   }
}


// main.dart
import 'util.dart';


Util.buildCupertinoButton('Track Simple Event',
   () => Adjust.trackEvent(Util.myAdjustEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  android_uuid     781f17d5-5048-4fae-a4e5-77b58bab62b9
  api_level        34
41 collapsed lines
  app_token        2fm9gkqubvpc
  app_version      1.0
  attribution_deeplink 1
  callback_params  {"key":"value","foo":"bar"}
  connectivity_type 1
  country          US
  cpu_type         arm64-v8a
  created_at       2024-01-25T14:13:16.151Z+0100
  currency         EUR
  device_manufacturer Google
  device_name      sdk_gphone64_arm64
  device_type      phone
  display_height   2205
  display_width    1080
  environment      sandbox
  event_buffering_enabled 0
  event_count      3
  event_token      g3mfiw
  gps_adid         5962dfc1-3a53-4692-850b-22c4bf4311a5
  gps_adid_attempt 2
  gps_adid_src     service
  hardware_name    UE1A.230829.036
  language         en
  mcc              310
  mnc              260
  needs_response_details 1
  os_build         UE1A.230829.036
  os_name          android
  os_version       14
  package_name     com.adjust.examples
  partner_params   {"key":"value","foo":"bar"}
  revenue          0.25
  screen_density   high
  screen_format    long
  screen_size      normal
  session_count    2
  session_length   23
  subsession_count 1
  time_spent       23
  tracking_enabled 1
  ui_mode          1

Record event revenue

Method signature
void setRevenue(Num revenue, String currency)

You can record revenue associated with an event by setting the revenue and currency properties on your event instance. Use this feature to record revenue-generating actions in your app.

To set these properties, call the setRevenue method and pass the following arguments:

  • revenue (num): The amount of revenue generated by the event
  • currency (String): The ISO 4217 code of the event currency.
AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
adjustEvent.setRevenue(0.01, 'EUR');
//...
Adjust.trackEvent(myAdjustEvent);

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button. The function sets the revenue property of this event to 0.25 and the currency property to EUR.

util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_REVENUE = 'g3mfiw';


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent myAdjustEvent() {
      AdjustEvent event = new AdjustEvent(EVENT_TOKEN_REVENUE);
      event.setRevenue(0.25, 'EUR');
      return event;
   }


}


// main.dart
import 'util.dart';


// Send revenue event button.
Util.buildCupertinoButton('Send Revenue Event',
   () => Adjust.trackEvent(Util.myAdjustEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  environment      sandbox
  event_count      3
  event_token      abc123
  revenue          0.25
  currency         EUR

Deduplicate revenue events

Property declaration
String? transactionId;

You can pass an optional identifier to avoid recording duplicate events. The SDK stores the last ten identifiers and skips revenue events with duplicate transaction IDs.

To set the identifier, assign your transaction ID to the setTransactionId property of your event instance.

AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
myAdjustEvent.transactionId = '{TransactionId}';
//...
Adjust.trackEvent(myAdjustEvent);

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button. The function sets the uniqueId to 5e85484b-1ebc-4141-aab7-25b869e54c49 using the setTransactionId method.

util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_REVENUE = 'g3mfiw';
   static const String UNIQUE_ID = '5e85484b-1ebc-4141-aab7-25b869e54c49';


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent myAdjustEvent() {
      AdjustEvent event = new AdjustEvent(EVENT_TOKEN_REVENUE);
      event.transactionId = UNIQUE_ID;
      return event;
   }


}


// main.dart
import 'util.dart';


// Send revenue event button.
Util.buildCupertinoButton('Send Revenue Event',
   () => Adjust.trackEvent(Util.myAdjustEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  environment      sandbox
  event_count      3
  event_token      abc123
  transaction_id   5e85484b-1ebc-4141-aab7-25b869e54c49

Add callback parameters

Method signature
void addCallbackParameter(String key, String value)

If you register a callback URL in the Adjust dashboard, the SDK sends a GET request to your callback URL when it records an event.

You can configure callback parameters to send to your servers. Once you configure parameters on an event, the SDK appends them to your callback URL. You can use this information to analyze your users’ in-app behavior with your BI system.

Add callback parameters to your event by calling the addCallbackParameter method with String key-value arguments. You can add multiple parameters by calling this method multiple times.

AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
adjustEvent.addCallbackParameter('key', 'value');
//...
Adjust.trackEvent(myAdjustEvent);

The Adjust SDK measures the event and sends a request to your URL with the callback parameters. For example, if you register the URL https://www.mydomain.com/callback, your callback looks like this:

https://www.mydomain.com/callback?key=value&foo=bar

If you’re using CSV uploads, make sure to add the parameters to your CSV definition.

Adjust supports many placeholders which you can use to pass information from the SDK to your URL. For example, the {idfa} placeholder for iOS and the {gps_adid} placeholder for Android. The {publisher_parameter} placeholder presents all callback parameters in a single string.

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button. The following callback parameters are added:

  • The event_token
  • The revenue_amount generated by the event

The resulting callback URL looks like this:

http://www.mydomain.com/callback?event_token=g3mfiw&revenue_amount=0.05
util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_CALLBACK = 'g3mfiw';


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent buildCallbackEvent() {
      AdjustEvent event = new AdjustEvent(EVENT_TOKEN_CALLBACK);
         event.addCallbackParameter('event_token', EVENT_TOKEN_CALLBACK);
         event.addCallbackParameter('revenue_amount', '0.05');
   return event;
   }


}


// main.dart
import 'util.dart';


// Send callback event button.
Util.buildCupertinoButton('Send Callback Event',
   () => Adjust.trackEvent(Util.buildCallbackEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  callback_params  {"event_token":"g3mfiw","revenue_amount":"0.05"}
  environment      sandbox
  event_count      1
  event_token      g3mfiw

Add partner parameters

Method signature
void addPartnerParameter(String key, String value)

You can send extra information to your network partners by adding partner parameters.

Adjust sends partner parameters to external partners you have set up. This information is useful for more granular analysis and retargeting purposes. Adjust’s servers forward these parameters once you have set them up and enabled them for a partner.

Add partner parameters to your event by calling the addPartnerParameter method with String key-value arguments. You can add multiple parameters by calling this method multiple times.

AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
adjustEvent.addPartnerParameter('key', 'value');
//...
Adjust.trackEvent(myAdjustEvent);

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button. The following partner parameters are added:

  • The product_id of the associated product
  • The user_id of the user who triggered the event
util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_PARTNER = 'g3mfiw';


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent buildPartnerEvent() {
      AdjustEvent event = new AdjustEvent(EVENT_TOKEN_PARTNER);
      event.addPartnerParameter('product_id', '29');
      event.addPartnerParameter('user_id', '835');
      return event;
   }


}


// main.dart
import 'util.dart';


// Send partner event button.
Util.buildCupertinoButton('Send Partner Event',
   () => Adjust.trackEvent(Util.buildPartnerEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  partner_params  {"product_id":"29","user_id":"835"}
  environment      sandbox
  event_count      1
  event_token      g3mfiw

Add a callback identifier

Property declaration
String? callbackId;

You can add a custom string identifier to each event you want to measure. Adjust’s servers can report on this identifier in event callbacks. This enables you to keep track of which events have been successfully measured.

Set up this identifier by assigning your ID to the callbackId property on your event instance.

AdjustEvent myAdjustEvent = new AdjustEvent('abc123');
//...
myAdjustEvent.callbackId = '{your_callback_id}';
//...
Adjust.trackEvent(myAdjustEvent);

Example

This example shows how to record an event with the token g3mfiw whenever a user interacts with a button. In this example, the callbackId is set to f2e728d8-271b-49ab-80ea-27830a215147.

util.dart
import 'package:adjust_sdk/adjust_event.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';


class Util {
   static const String EVENT_TOKEN_SIMPLE = 'g3mfiw';
   static const String CALLBACK_ID = "f2e728d8-271b-49ab-80ea-27830a215147"


   static Widget buildCupertinoButton(String text, Function action) {
      return new CupertinoButton(
         child: Text(text),
         color: CupertinoColors.activeBlue,
         padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 30.0),
         onPressed: action as void Function()?,
      );
   }


   static AdjustEvent myAdjustEvent() {
      AdjustEvent event = new AdjustEvent(EVENT_TOKEN_SIMPLE);
      event.callbackId = CALLBACK_ID;
      return event;
}


// main.dart
import 'util.dart';


Util.buildCupertinoButton('Send Callback Event',
   () => Adjust.trackEvent(Util.myAdjustEvent())),
const Padding(padding: const EdgeInsets.all(7.0))
Event log
Path:      /event
ClientSdk: flutter4.38.1
Parameters:
  environment      sandbox
  event_count      3
  event_token      g3mfiw
  callback_id      f2e728d8-271b-49ab-80ea-27830a215147