点击意见反馈后，程序崩溃

[jasonsyf]

log如下：
04-11 12:01:11.632 21572-21572/com.codeest.geeknews E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.codeest.geeknews, PID: 21572
java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.
at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:111)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5648)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:845)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:735)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v4.widget.SwipeRefreshLayout.isRefreshing()' on a null object reference
at com.codeest.geeknews.ui.zhihu.fragment.ThemeFragment.showError(ThemeFragment.java:86)
at com.codeest.geeknews.widget.CommonSubscriber.onError(CommonSubscriber.java:45)
at io.reactivex.internal.operators.flowable.FlowableObserveOn$BaseObserveOnSubscriber.checkTerminated(FlowableObserveOn.java:207)
at io.reactivex.internal.operators.flowable.FlowableObserveOn$ObserveOnSubscriber.runAsync(FlowableObserveOn.java:392)
at io.reactivex.internal.operators.flowable.FlowableObserveOn$BaseObserveOnSubscriber.run(FlowableObserveOn.java:176)
at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:109)
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5648) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:845) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:735) 

[jp1017]

android.support.v4.widget.SwipeRefreshLayout.isRefreshing()' on a null object reference

wtf, 空指针了 😄

[codeestX]

@jasonsyf Hi，看log应该不是意见反馈引起的问题，刚提交了一版调整了BaseFragment里面ButterKnife.unbind()和unSubscribe的顺序，先取消订阅再销毁View防止异步可能引发的这种问题，感谢反馈