Go to task overview, trigger multiple windows (or split screen or whatever that is called)
Crash
FATAL EXCEPTION: main
Process: com.ensoft.imgurviewer, PID: 10365
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window androidx.fragment.app.FragmentActivity.getWindow()' on a null object reference
at com.ensoft.imgurviewer.view.fragment.ImageViewerFragment.setSystemUiVisibility(ImageViewerFragment.java:721)
at com.ensoft.imgurviewer.view.fragment.ImageViewerFragment.access$500(ImageViewerFragment.java:81)
at com.ensoft.imgurviewer.view.fragment.ImageViewerFragment$7.run(ImageViewerFragment.java:747)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7705)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:952)
2.3.3 F-Droid
Open an url
Go to task overview, trigger multiple windows (or split screen or whatever that is called)
Crash