Comments (6)
nitrico
commented on August 10, 2024
Hi @LissF, thanks for reporting the problem. I'll try to reproduce it to see where the problem is.
According to the log, it seems like you are using an ObservableList and you are modifying it when you are in that other activity, is it right?
Meanwhile, can you please tell me if that happens also in version 1.1.1?
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LissF
commented on August 10, 2024
@nitrico, I've updated LastAdapter to 1.2.1. I've also made a lot of development/fixes in my project and I'm not able to reproduce the issue anymore.
I don't think I was changing my ObservableArrayList from another activity. But maybe I change some fields of items of that list in really indirect way. It could be the issue, right? I'll try to fix that behavior. Sorry, I'm new with databinding :)
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nitrico
commented on August 10, 2024
It should be OK to change the items or their fields at any time, just asked to try to reproduce the situation where it happened.
I close the issue as it looks like is not happening anymore but feel free to reopen if it happens again or you have any other question. Thank you.
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LissF
commented on August 10, 2024
Hello again :)
Got same issue on switching tabs. I have 4 tabs, so fragments got recreated on switch between 1 and 4. This issue happens not all the time but I'm able to reproduce it if I switch between tabs some time. It looks like databinding holds old callback. Is it possible? Maybe I have to add some code to "onDestroyView()" to clear that CallbackRegistry?
java.lang.IllegalStateException: reference.get() must not be null
at com.github.nitrico.lastadapter.WeakReferenceOnListChangedCallback.getAdapter(WeakReferenceOnListChangedCallback.kt:30)
at com.github.nitrico.lastadapter.WeakReferenceOnListChangedCallback.onItemRangeRemoved(WeakReferenceOnListChangedCallback.kt:44)
at android.databinding.ListChangeRegistry$1.onNotifyCallback(ListChangeRegistry.java:54)
at android.databinding.ListChangeRegistry$1.onNotifyCallback(ListChangeRegistry.java:38)
at android.databinding.CallbackRegistry.notifyCallbacks(CallbackRegistry.java:201)
at android.databinding.CallbackRegistry.notifyFirst64(CallbackRegistry.java:122)
at android.databinding.CallbackRegistry.notifyRemainder(CallbackRegistry.java:169)
at android.databinding.CallbackRegistry.notifyRecurse(CallbackRegistry.java:145)
at android.databinding.CallbackRegistry.notifyCallbacks(CallbackRegistry.java:91)
at android.databinding.ListChangeRegistry.notifyCallbacks(ListChangeRegistry.java:135)
at android.databinding.ListChangeRegistry.notifyRemoved(ListChangeRegistry.java:118)
at android.databinding.ObservableArrayList.notifyRemove(ObservableArrayList.java:124)
at android.databinding.ObservableArrayList.clear(ObservableArrayList.java:79)
at my.package.view.MyFragment.onActivityCreated(MyFragment.java:90)
at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:2083)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1129)
at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1464)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:748)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1632)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:637)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1237)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:668)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:630)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:611)
at android.support.design.widget.TabLayout$ViewPagerOnTabSelectedListener.onTabSelected(TabLayout.java:2156)
at android.support.design.widget.TabLayout.dispatchTabSelected(TabLayout.java:1138)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1132)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1105)
at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1396)
at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1501)
at android.view.View$PerformClick.run(View.java:19881)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5294)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:102)
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LissF
commented on August 10, 2024
OK, it looks like I've fixed it by recreating my ObservableArrayList. Previously I held it in final field and created only once. Now I recreate my ObservableArrayList in "onActivityCreated()" and crash is gone.
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nitrico
commented on August 10, 2024
I found a very similar problem myself. It is "fixed" in version 1.2.2.
And I say "fixed" because this exception won't be thrown anymore (in this new version at least), but I'm not sure if I did the right thing as I think the exception is more related to the way the ObservableList is manipulated and the RecyclerView being attached and detached than the library itself.
If I discover the exact reason and is it is what I mentioned, future versions could throw this exception again as it can help to handle the ObservableList and/or RecyclerView in a more proper way.
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