[NoClassDefFoundError] Crash with version 2.16.4 on start Ranging Beacons In Region

Expected behavior

Library starts ranging.

Actual behavior

java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/localbroadcastmanager/content/LocalBroadcastManager;

org.altbeacon.beacon.BeaconLocalBroadcastProcessor.unregister + 80 (BeaconLocalBroadcastProcessor.java:80)
--
  | org.altbeacon.beacon.BeaconLocalBroadcastProcessor.register + 72 (BeaconLocalBroadcastProcessor.java:72)
  | org.altbeacon.beacon.service.ScanJobScheduler.ensureNotificationProcessorSetup + 70 (ScanJobScheduler.java:70)
  | org.altbeacon.beacon.service.ScanJobScheduler.schedule + 130 (ScanJobScheduler.java:130)
  | org.altbeacon.beacon.service.ScanJobScheduler.applySettingsToScheduledJob + 85 (ScanJobScheduler.java:85)
  | org.altbeacon.beacon.service.ScanJobScheduler.applySettingsToScheduledJob + 92 (ScanJobScheduler.java:92)
  | org.altbeacon.beacon.BeaconManager.applyChangesToServices + 1003 (BeaconManager.java:1003)
  | org.altbeacon.beacon.BeaconManager.startMonitoringBeaconsInRegion + 938 (BeaconManager.java:938)
  | org.altbeacon.beacon.startup.RegionBootstrap$InternalBeaconConsumer.onBeaconServiceConnect + 203 (RegionBootstrap.java:203)
  | org.altbeacon.beacon.BeaconManager.bind + 420 (BeaconManager.java:420)
  | org.altbeacon.beacon.startup.RegionBootstrap.<init> + 105 (RegionBootstrap.java:105)

Steps to reproduce this behavior

Replaced the 2.16.3 lib with new version 2.16.4

implementation ‘org.altbeacon:android-beacon-library:2.16.3’

Build a release APK Run the APK and start scanning for BLE devices and beacons

Crash is not reproduced when running the app locally from Android Studio

Mobile device model and OS version

OnePlus A6003 Android 10

Android Beacon Library version

2.16.4

IMPORTANT: This forum is reserved for feature requests or reproducible bugs with the library itself. If you need help with using the library with your project, please open a new question on StackOverflow.com.

[davidgyoung]

At least the StackOverflow post above provides a workaround.

[matdev]

Thanks for the link to the stackoverflow question. Using the accepted answer, my app no longer crashes using version 2.16.4 of the lib 😃

I’ve had to add the following code in my app/build.gradle though:

android.packagingOptions { 
    exclude 'META-INF/androidx.localbroadcastmanager_localbroadcastmanager.version' 
}

NOTE: I’m unable to install the unsigned APK of the reference app. If you still want me to test it, can you please send me a signed APK ?