NestedScrollView中的多个Recyclerview不会进行java视图回收

Question

我在管理Recyclerview内的多个NestedScrollView回收时遇到了一个问题。让我告诉你我想做什么-

1. 我有两种框架布局，即框架1和框架2
2. 我有两个包含recyclerview的片段，第一个片段的recyclerview水平显示项目，而第二个片段的recyclerview垂直显示列表
3. 现在我把这两个FrameLayout都放在了一个NestedScroolView中，frame1 recyclerview正确地回收了所有视图，但是frame2 recylerview没有回收视图，不知道为什么？它首先加载所有项目，然后显示在屏幕上

一些代码：

主要活动。java

 FragmentTransaction transaction;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
setContentView(R.layout.main);
FragmentA frag1=new FragmentA();
FragmentB frag2=new FragmentB();
transaction =    getSupportFragmentManager().beginTransaction();
    transaction.replace(R.id.frame1, frag1);
    transaction.addToBackStack(frag1.getClass().getName());
    transaction.commit();

 transaction =   getSupportFragmentManager().beginTransaction();
    transaction.replace(R.id.frame2, frag2);
    transaction.addToBackStack(frag2.getClass().getName());
    transaction.commit();
}

main。xml

  <LinearLayout
 xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
 xmlns:app="http://schemas.安卓.com/apk/res-auto"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content">

 <安卓.support.v4.widget.NestedScrollView
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent"
    安卓:fillViewport="true"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">
  <LinearLayout
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content"
        安卓:orientation="vertical">

        <FrameLayout
            安卓:id="@+id/frame1"
            安卓:layout_width="match_parent"
            安卓:layout_height="185dp" />

        <FrameLayout
            安卓:id="@+id/frame2"
            安卓:layout_width="match_parent"
            安卓:layout_height="wrap_content"
             />

</LinearLayout>
</安卓.support.v4.widget.NestedScrollView>
    </LinearLayout>

片段a:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v= inflater.inflate(R.layout.recycler_view, container, false);
    mDataListView = (RecyclerView) v.findViewById(R.id.data_list_view);
    mDataListView .setHasFixedSize(true);
    final GridLayoutManager gridLayoutManager = new GridLayoutManager(getActivity(), getActivity().getResources().getInteger(R.integer.playlist_categories_columns), GridLayoutManager.VERTICAL, false);

    mDataListView .setNestedScrollingEnabled(false);
   }
    }));


    return v;
}

片段b:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v= inflater.inflate(R.layout.recycler_view, container, false);
    mDataListView = (RecyclerView) v.findViewById(R.id.data_list_view);
    mDataListView .setHasFixedSize(true);
     final GridLayoutManager gridLayoutManager = new    GridLayoutManager(getActivity(), 1, GridLayoutManager.HORIZONTAL, false);
    mDataListView .setLayoutManager(gridLayoutManager);

    mDataListView .setNestedScrollingEnabled(false);
   }
    }));


    return v;
}

回收者视图。xml

 <?xml version="1.0" encoding="utf-8"?>
 <安卓.support.v7.widget.RecyclerView    xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
xmlns:app="http://schemas.安卓.com/apk/res-auto"
安卓:id="@+id/data_list_view"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />

我希望我的问题清楚