Lifecycle

In version 4 of the iOS SDK, this implementation was completed automatically.

The Experience Platform SDK will not automatically collect Lifecycle metrics. To continue collecting Lifecycle metrics, you must add code to your app. For more information, see Manual Lifecycle Implementation.

Sessions contain information about the app's current lifecycle, such as the device information, the application install or upgrade information, the session start and pause times, the number of application launches, and additional context data that is provided by the developer through the LifecycleStart API. Session data is persisted, so it is available across application launches.

Add Lifecycle to your app

Android
iOS
React Native
Flutter
Android
  1. Import the library:

import com.adobe.marketing.mobile.*;
iOS

Objective-C

  1. Import the library:

#import "ACPLifecycle.h"
#import "ACPCore.h"

Swift

  1. In Swift, importing ACPCore also imports the necessary Lifecycle APIs:

import ACPCore
React Native

JavaScript

Import the Lifecycle extension

import {ACPLifecycle} from '@adobe/react-native-acpcore';
Flutter

Dart

Import the Lifecycle extension

import 'package:flutter_acpcore/flutter_acplifecycle.dart';

Register Lifecycle with Mobile Core and add appropriate Start/Pause calls

Android
iOS
React Native
Android
  1. Register the Lifecycle extension:

    public class TargetApp extends Application {
    @Override
    public void onCreate() {
    super.onCreate();
    MobileCore.setApplication(this);
    try {
    Lifecycle.registerExtension();
    } catch (Exception e) {
    //Log the exception
    }
    }
    }
  2. In the onResume function, start the lifecycle data collection:

    @Override
    public void onResume() {
    MobileCore.setApplication(getApplication());
    MobileCore.lifecycleStart(null);
    }

    Setting the application is only necessary on activities that are entry points for your application. However, setting the application on each Activity has no negative impact and ensures that the SDK always has the necessary reference to your application. We recommend that you call setApplicationin each of your activities.

  3. In the onPause function, pause the lifecycle data collection:

    @Override
    public void onPause() {
    MobileCore.lifecyclePause();
    }

    To ensure accurate session and crash reporting, this call must be added to every activity.

iOS
  1. Register the Lifecycle extension with the SDK Core by adding the following to your app's application:didFinishLaunchingWithOptions: delegate method:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // register the lifecycle extension
    [ACPLifecycle registerExtension];
    return YES;
    }
  2. Start Lifecycle data collection by calling lifecycleStart: from within the callback of the ACPCore::start: method in your app's application:didFinishLaunchingWithOptions: delegate method.

    If your iOS application supports background capabilities, your application:didFinishLaunchingWithOptions: method might be called when iOS launches your app in the background. If you do not want background launches to count towards your lifecycle metrics, then lifecycleStart: should only be called when the application state is not equal to UIApplicationStateBackground.

    - (BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // register the lifecycle extension
    [ACPLifecycle registerExtension];
    const UIApplicationState appState = application.applicationState;
    [ACPCore start:^{
    // only start lifecycle if the application is not in the background
    if (appState != UIApplicationStateBackground) {
    [ACPCore lifecycleStart:nil];
    }
    }];
    }
  3. When launched, if your app is resuming from a backgrounded state, iOS might call your applicationWillEnterForeground: delegate method. You also need to call lifecycleStart:, but this time you do not need all of the supporting code that you used in application:didFinishLaunchingWithOptions::

    - (void) applicationWillEnterForeground:(UIApplication *)application {
    [ACPCore lifecycleStart:nil];
    }
  4. When the app enters the background, pause Lifecycle data collection from your app's applicationDidEnterBackground: delegate method:

    - (void) applicationDidEnterBackground:(UIApplication *)application {
    [ACPCore lifecyclePause];
    }

Swift

  1. Register the Lifecycle extension with the SDK Core by adding the following to your app's application:didFinishLaunchingWithOptions: delegate method:

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // register the lifecycle extension
    ACPLifecycle.registerExtension();
    }
  2. Start Lifecycle data collection by calling lifecycleStart: from within the callback of the ACPCore::start: method in your app's application:didFinishLaunchingWithOptions: delegate method.

    If your iOS application supports background capabilities, your application:didFinishLaunchingWithOptions: method might be called when iOS launches your app in the background. If you do not want background launches to count towards your lifecycle metrics, then lifecycleStart: should only be called when the application state is not equal to UIApplicationStateBackground.

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // register the lifecycle extension
    ACPLifecycle.registerExtension();
    let appState = application.applicationState;
    ACPCore.start {
    // only start lifecycle if the application is not in the background
    if appState != .background {
    ACPCore.lifecycleStart(nil)
    }
    }
    }
  3. When launched, if your app is resuming from a backgrounded state, iOS might call your applicationWillEnterForeground: delegate method. You also need to call lifecycleStart:, but this time you do not need all of the supporting code that you used in application:didFinishLaunchingWithOptions::

    func applicationWillEnterForeground(_ application: UIApplication) {
    ACPCore.lifecycleStart(nil)
    }
  4. When the app enters the background, pause Lifecycle data collection from your app's applicationDidEnterBackground: delegate method:

    func applicationDidEnterBackground(_ application: UIApplication) {
    ACPCore.lifecyclePause()
    }
React Native

Registering the extension with Core:

When using React Native, registering Lifecycle with Mobile Core should be done in native code which is shown under the Android and iOS tabs.

Note: Implementing Lifecycle via JavaScript may lead to inaccurate Lifecycle metrics, therefore we recommend implementing Lifecycle in native Android and iOS code. However, these APIs are still provided in JavaScript to support flexible Lifecycle implementations.

Starting a lifecycle event:

ACPCore.lifecycleStart({"lifecycleStart": "myData"});

Pausing a lifecycle event:

ACPCore.lifecyclePause();

Lifecycle metrics

The following is a complete list of all of the metrics provided on your user's app lifecycle.

Metric

Key

Description

App ID

a.AppID

Stores the application name and version in the following format: AppName BundleVersion (app version code) . An example of this format is MyAppName 1.1(1).

Device Name

a.DeviceName

Stores the device name.

Operating System Version

a.OSVersion

Operating system name and version.

Carrier Name

a.CarrierName

Stores the name of the mobile service provider as provided by the device.

Important: This metric is not automatically stored in an Analytics variable. You must create a processing rule to copy this value to an Analytics variable for reporting.

Resolution

a.Resolution

Width x Height in pixels.

Locale

a.locale

Locale set for this device, for example, en-US.

Install

Metric

Key

DescriptIon

First Launches

a.InstallEvent

Triggered at the first run after installation or re-installation.

Install Date

a.InstallDate

Date of first launch after installation. The format is M/d/yyyy, and an example is 5/3/2017.

Upgrade

Metric

Key

Description

Upgrades

a.UpgradeEvent

Triggered at the first run after upgrade or when the version number changes.

Days since last upgrade

a.DaysSinceLastUpgrade

Number of days since the application version number changed.

Launches since last upgrade

a.LaunchesSinceUpgrade

Number of launches since the application version number changed.

Launch

Metric

Key

Description

Daily Engaged Users

a.DailyEngUserEvent

Triggered when the application is used on a particular day. Important: This metric is not automatically stored in an Analytics metric. You must create a processing rule that sets a custom event to capture this metric.

Monthly Engaged Users

a.MonthlyEngUserEvent

Triggered when the application is used during a particular month. Important: This metric is not automatically stored in an Analytics metric. You must create a processing rule that sets a custom event to capture this metric.

Launches

a.LaunchEvent

Triggered on every run, including crashes and installs. Also triggered when the app is resumed from the background after the lifecycle session timeout is exceeded.

Previous Session Length

a.PrevSessionLength

Reports the number of seconds that a previous application session lasted based on how long the application was open and in the foreground.

Ignored Session Length

a.ignoredSessionLength

If the last session is set to last longer than lifecycle.sessionTimeout, that session length is ignored and recorded here.

Launch Number

a.Launches

Number of times the application was launched or brought out of the background.

Days since first use

a.DaysSinceFirstUse

Number of days since first run.

Days since last use

a.DaysSinceLastUse

Number of days since last use.

Hour of Day

a.HourOfDay

Measures the hour the app was launched and uses the 24-hour numerical format. Used for time parting to determine peak usage times.

Day of Week

a.DayOfWeek

Measures the day of the week the app was launched.

Crash

Metric

Key

Description

Crashes

a.CrashEvent

Triggered when the application crashed before closing. The event is sent when the application is started again after the crash.

Device Information

Metric

Key

Description

AppID

a.AppID

Stores the application name and version in the AppName BundleVersion (app version code) format. An example of this format is MyAppName 1.1(1).

Device name

a.DeviceName

Stores the device name.

Operating system version

a.OSVersion

Operating system name and version.

Carrier name

a.CarrierName

Stores the name of the mobile service provider as provided by the devices.

Important: This metric is not automatically stored in an Analytics variable. For reporting, you must create a processing rule to copy this value to an Analytics variable.

Resolution

a.Resolution

Width x height, in pixels.

Locale

a.Locale

Locale set for this device, for example, en-US.

If you need to programmatically update your SDK configuration, use the following information to change your Lifecycle configuration values: {% hint style="warning" %} The time that your app spends in the background is not included in the session length. {% endhint %}.

Key

Description

lifecycle.sessionTimeout

Time, in seconds, that must elapse between the time the app is launched and before the launch is considered to be a new session. This timeout also applies when your application is sent to the background and reactivated.

Default value is 300 seconds (5 minutes).