--------- beginning of crash
2020-03-25 01:17:58.764 21924-21924/com.hanseo_software.kingjunseok E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.hanseo_software.kingjunseok, PID: 21924
java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@c25f4ed rejected from com.google.firebase.database.core.utilities.DefaultRunLoop$1@917af22[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 1]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2078)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:843)
at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:334)
at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:562)
at java.util.concurrent.ScheduledThreadPoolExecutor.execute(ScheduledThreadPoolExecutor.java:654)
at com.google.firebase.database.core.utilities.DefaultRunLoop.scheduleNow(com.google.firebase:firebase-database@@16.0.4:105)
at com.google.firebase.database.core.Repo.scheduleNow(com.google.firebase:firebase-database@@16.0.4:276)
at com.google.firebase.database.DatabaseReference.setValueInternal(com.google.firebase:firebase-database@@16.0.4:296)
at com.google.firebase.database.DatabaseReference.setValue(com.google.firebase:firebase-database@@16.0.4:166)
at com.hanseo_software.kingjunseok.MapsActivity.onLocationChanged(MapsActivity.java:133)
at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:292)
at android.location.LocationManager$ListenerTransport.-wrap0(Unknown Source:0)
at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:237)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
2020-03-25 01:17:59.936 21924-22024/com.hanseo_software.kingjunseok W/DynamiteModule: Local module descriptor class for com.google.android.gms.googlecertificates not found.
2020-03-25 01:17:59.939 21924-22024/com.hanseo_software.kingjunseok I/DynamiteModule: Considering local module com.google.android.gms.googlecertificates:0 and remote module com.google.android.gms.googlecertificates:4
2020-03-25 01:17:59.939 21924-22024/com.hanseo_software.kingjunseok I/DynamiteModule: Selected remote version of com.google.android.gms.googlecertificates, version >= 4
2020-03-25 01:17:59.945 21924-22024/com.hanseo_software.kingjunseok W/zygote: Unsupported class loader
2020-03-25 01:17:59.955 21924-22024/com.hanseo_software.kingjunseok W/zygote: Skipping duplicate class check due to unsupported classloader
