RecyclerView render issue if wrapped inside NestedScrollView

[punitshah89]

• [x ] I have searched existing issues and confirmed this is not a duplicate

Issues and steps to reproduce

RecyclerView is not showing all items when list is long when used with FlexboxLayoutManager

1. Wrap RecyclerView with android:nestedScrollingEnabled="false" inside NestedScrollView
2. Create and add FlexboxLayoutManager to RecyclerView
3. Load recycler view with long list of items

Expected behavior

RecyclerView should render all items

Version of the flexbox library

0.3.1, 0.3.2

Code example based on repro steps

<android.support.v4.widget.NestedScrollView
xmlns:android="https://schemas.android.com/apk/res/android"
xmlns:app="https://schemas.android.com/apk/res-auto"
   android:id="@+id/nested_scroll_view"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:fillViewport="true"
   android:scrollbars="none"
   app:layout_behavior="@string/appbar_scrolling_view_behavior">
       <android.support.v7.widget.RecyclerView
           android:id="@+id/recycler_view"
           android:nestedScrollingEnabled="false"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
       />
</android.support.v4.widget.NestedScrollView>

RecyclerView.LayoutManager layoutManager = new FlexboxLayoutManager(this.getContext());
mRecyclerView.setLayoutManger(layoutManager);

[thagikura]

Thanks for the report. Confirmed the behavior, but I don't come up with a usecase where RecyclerView is wrapped with a NestedScrollView in practice.

In what usecase do you expect that situation?

[punitshah89]

Thanks for your quick reply, In my case I'm using multiple views including customRecyclerView inside NestedScrollView, where I want to make whole screen scroll instead of RecyclerView.

[thagikura]

But NestedScrollView if able to have only a single direct child. So it's not possible to make the entire screen scrollable including RecyclerView, no?

[punitshah89]

Yes we can add root element to all views and screen is scrollable, in my case I'm using RelativeLayout and following structure.

<android.support.v4.widget.NestedScrollView
xmlns:android="https://schemas.android.com/apk/res/android"
xmlns:app="https://schemas.android.com/apk/res-auto"
   android:id="@+id/nested_scroll_view"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:fillViewport="true"
   android:scrollbars="none"
   app:layout_behavior="@string/appbar_scrolling_view_behavior">

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

<Otherviews />
<CustomRecyclerView />

</RelativeLayout>
</android.support.v4.widget.NestedScrollView>

[thagikura]

Oh so the actual XML was different from the one you pasted in the first comment. Understood.