您好，帮忙看一下这个出错的问题

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.app.Activity.isDestroyed()' on a null object reference
at com.kongzue.dialog.util.BaseDialog.showNext(BaseDialog.java:165)
at com.kongzue.dialog.util.BaseDialog$1.onDismiss(BaseDialog.java:142)
at com.kongzue.dialog.util.DialogHelper.onDismiss(DialogHelper.java:330)
at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1323)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5563)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:737)

Start with the stack trace in BaseDialog.java at lines 142 and 165, then inspect DialogHelper.java at line 330 and the surrounding dismissal flow. Reproduce the reported NullPointerException if possible and identify the lifecycle state that leaves the Activity reference null; done means the dismissal path no longer crashes in that case.

Written by the indexing model from the issue text.