Crash report that "NullPointerException" in "setDropDownMenu"

[ybs32]

The stack trace is this.

java.lang.NullPointerException: 
  at android.view.LayoutInflater.from (LayoutInflater.java:282)
  at android.widget.ArrayAdapter.<init> (ArrayAdapter.java:213)
  at android.widget.ArrayAdapter.<init> (ArrayAdapter.java:207)
  at android.widget.ArrayAdapter.<init> (ArrayAdapter.java:165)
  at com.ybsystem.tweethub.fragments.timeline.MainListTimeline.setDropDownMenu (MainListTimeline.java)
  at com.ybsystem.tweethub.fragments.timeline.MainListTimeline.access$100 (MainListTimeline.java)
  at com.ybsystem.tweethub.fragments.timeline.MainListTimeline$2.onError (MainListTimeline.java:26)
  at io.reactivex.rxjava3.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.checkTerminated (ObservableObserveOn.java:47)
  at io.reactivex.rxjava3.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.drainNormal (ObservableObserveOn.java)
  at io.reactivex.rxjava3.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.run (ObservableObserveOn.java)
  at io.reactivex.rxjava3.android.schedulers.HandlerScheduler$ScheduledRunnable.run (HandlerScheduler.java:2)
  at android.os.Handler.handleCallback (Handler.java:938)
  at android.os.Handler.dispatchMessage (Handler.java:99)
  at android.os.Looper.loop (Looper.java:223)
  at android.app.ActivityThread.main (ActivityThread.java:7887)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:592)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:981)

[ybs32]

Probably the same problem as this one. https://stackoverflow.com/questions/26093600/nullpointerexception-layoutinflater-fromcontext-fragment-android

Source code https://github.com/ybs32/TweetMate-for-Android/blob/a60db9a69b28c71d7873a74aa9537be70afa31ad/TweetMate/src/main/java/com/ybsystem/tweetmate/fragments/timeline/MainListTimeline.java#L207-L209

[ybs32]

Priority is "Medium".

If users get this error, it can be very stressful, they not being able to open the app and see the timeline,

but in most cases, "Activity" is created at this time, and this problem seems to occur infinitely rarely.

[ybs32]

Done.