Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent, On AlarmPingSender

Question

Problem

Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. I got it after updating target SDK to 31. the error always come after AlarmPingSender. But i dont know any class that used AlarmPingSender.

2021-10-31 10:43:04.990 17031-17341/com.app.mobile D/AlarmPingSender: Register alarmreceiver to MqttServiceMqttService.pingSender.com.app.mobile-2e24ccbde048f2e91635651784
2021-10-31 10:43:04.993 17031-17341/com.app.mobile E/AndroidRuntime: FATAL EXCEPTION: MQTT Rec: com.app.mobile-2e24ccbde048f2e91635651784
    Process: com.app.mobile, PID: 17031
    java.lang.IllegalArgumentException: com.app.mobile: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
    Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
        at android.app.PendingIntent.checkFlags(PendingIntent.java:375)
        at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:645)
        at android.app.PendingIntent.getBroadcast(PendingIntent.java:632)
        at org.eclipse.paho.android.service.AlarmPingSender.start(AlarmPingSender.java:76)
        at org.eclipse.paho.client.mqttv3.internal.ClientState.connected(ClientState.java:1150)
        at org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:987)
        at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:118)
        at java.lang.Thread.run(Thread.java:920)

What I Already done

• Upgrade WorkManager to 2.7.0
• set AllProject to force use WorkManager to 2.7.0
• change all existing PendingIntent to use FLAG_IMMUTABLE
• there's old code that still use gcm and disable it
• Updating all Firebase package (some said its because of later version of analytics)

Library Used

• OneSignal
• Qiscus
• Firebase
• WorkManager

Answer 1

Add the following to your build.gradle(app) dependencies.

dependencies {
  // For Java
  implementation 'androidx.work:work-runtime:2.7.1' 

  // For Kotlin
  implementation 'androidx.work:work-runtime-ktx:2.7.1'
}