ApplicationNotResponding: ANR in LifecycleMonitorAndroid

Environment

• Android OS version: 16
• Devices affected: Samsung SM-F966U1
• Maps SDK Version: 11.17.1

Observed behavior and steps to reproduce

ANR in LifecycleMonitorAndroid.updateLifecycleState() during activity resume

The app experiences ANRs when any activity resumes, even activities that don't contain a MapView. The ANR occurs in Mapbox's internal lifecycle monitoring.

Stack trace:
io.sentry.android.core.ApplicationNotResponding: ANR
at com.mapbox.common.LifecycleMonitorAndroid.updateLifecycleState(unavailable:0)
at com.mapbox.common.LifecycleMonitorAndroid.access$updateLifecycleState(unavailable:0)
at com.mapbox.common.LifecycleMonitorAndroid$lifecycleServiceCallback$1.onLifecycleStateChanged(unavailable:7)
at com.mapbox.common.LifecycleService.updateLifecycleState(unavailable:13)
at com.mapbox.common.LifecycleService.getLifecycleState(SourceFile:12)
at com.mapbox.common.LifecycleService.registerActivityWithState(unavailable:111)
at com.mapbox.common.LifecycleService.access$registerActivityWithState(unavailable:0)
at com.mapbox.common.LifecycleService$callback$1.onActivityResumed(unavailable:10)
at android.app.Application.dispatchActivityResumed(Application.java:450)
at android.app.Activity.dispatchActivityResumed(Activity.java:1686)
at android.app.Activity.onResume(Activity.java:2287)
at androidx.fragment.app.FragmentActivity.onResume(unavailable:5)
at com.example.app.onboarding.OnboardingActivity.onResume(unavailable:0)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1720)
at android.app.Activity.performResume(Activity.java:9691)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:6162)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:6265)
...

Steps to reproduce:

1. Initialize Mapbox SDK in Application.onCreate() by setting MapboxOptions.accessToken
2. Launch any activity (doesn't need to contain a MapView)
3. Observe ANR during onResume() in Mapbox's lifecycle callback

Expected behavior

LifecycleMonitorAndroid.updateLifecycleState() should not block the main thread and cause ANRs. Lifecycle state updates should be fast and non-blocking, or performed asynchronously.

Notes / preliminary analysis

• It rarely happens
• The ANR occurs in activities that have no MapView or map-related functionality
• Once MapboxOptions.accessToken is set, Mapbox registers ActivityLifecycleCallbacks that run on every activity lifecycle event
• The updateLifecycleState() method appears to perform blocking operations
• There is no API available to disable or configure this automatic lifecycle monitoring
• This affects user experience even when maps are not being displayed

Additional links and references

• Related to lifecycle monitoring introduced in Mapbox Maps SDK v11
• Using com.mapbox.maps:android-ndk27:11.17.1

Start at LifecycleMonitorAndroid.updateLifecycleState and trace the ActivityLifecycleCallbacks registration triggered after MapboxOptions.accessToken is set. Reproduce with an Application.onCreate initialization and an activity without a MapView; done means activity resume no longer causes a main-thread ANR.