Crash report "android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@f55c196 is not valid; is your activity running? in Updatemanager.onCancel()"

[K1rakishou]

/Kuroba-dev | FileCacheV2: [NormalFileCacheV2Thread-3]: Request [FileDownloadRequest: url = https://kuroba.io:8443/apk/41100_6c52470b13f53057e1c06e860edf0c89e4ea0a35.apk, outputFileName = d6a0b63ae578d000df651e1163c98c51.cache] canceled, downloaded = 376680, total = 10813446, network class = WIFI, downloads = 1
E/Kuroba-dev | UNCAUGHT: Called from unhandled exception handler.
E/Kuroba-dev | UNCAUGHT: android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@f55c196 is not valid; is your activity running?
E/Kuroba-dev | UNCAUGHT: 	at android.view.ViewRootImpl.setView(ViewRootImpl.java:931)
E/Kuroba-dev | UNCAUGHT: 	at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:387)
E/Kuroba-dev | UNCAUGHT: 	at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:95)
E/Kuroba-dev | UNCAUGHT: 	at android.app.Dialog.show(Dialog.java:342)
E/Kuroba-dev | UNCAUGHT: 	at androidx.appcompat.app.AlertDialog$Builder.show(AlertDialog.java:1009)
E/Kuroba-dev | UNCAUGHT: 	at com.github.adamantcheese.chan.core.manager.UpdateManager$1.onCancel(UpdateManager.java:341)
E/Kuroba-dev | UNCAUGHT: 	at com.github.adamantcheese.chan.core.cache.FileCacheV2$handleResults$6.invoke(FileCacheV2.kt:742)
E/Kuroba-dev | UNCAUGHT: 	at com.github.adamantcheese.chan.core.cache.FileCacheV2$handleResults$6.invoke(FileCacheV2.kt:43)
E/Kuroba-dev | UNCAUGHT: 	at com.github.adamantcheese.chan.core.cache.FileCacheV2$resultHandler$1$1.run(FileCacheV2.kt:827)
E/Kuroba-dev | UNCAUGHT: 	at android.os.Handler.handleCallback(Handler.java:883)
E/Kuroba-dev | UNCAUGHT: 	at android.os.Handler.dispatchMessage(Handler.java:100)
E/Kuroba-dev | UNCAUGHT: 	at android.os.Looper.loop(Looper.java:214)
E/Kuroba-dev | UNCAUGHT: 	at android.app.ActivityThread.main(ActivityThread.java:7356)
E/Kuroba-dev | UNCAUGHT: 	at java.lang.reflect.Method.invoke(Native Method)
E/Kuroba-dev | UNCAUGHT: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/Kuroba-dev | UNCAUGHT: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

[K1rakishou]

Maybe it's better to just add the "isInForeground()" check to the FileCacheV2 where the callbacks are called, so if the activity is stopped no callbacks are called than adding these checks everywhere else?

[Adamantcheese]

There are instances where the FileCache should continue to call the callback, but we don't want certain specific rendering actions to occur. The rest of the AlertDialog instances seem to be fine and shouldn't cause this sort of crash.