android - Recyclerview inside ViewPager which is inside nested Scroll View -

i have used following code inside coordinator layout , using custom collapsing toolbar design.

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.coordinatorlayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:ignore="rtlhardcoded">      <android.support.design.widget.appbarlayout         android:id="@+id/main.appbar"         android:layout_width="match_parent"         android:layout_height="250dp"         android:background="@drawable/backg">          <android.support.design.widget.collapsingtoolbarlayout             android:id="@+id/main.collapsing"             android:layout_width="match_parent"             android:layout_height="250dp"             app:contentscrim="?attr/colorprimary"             app:layout_scrollflags="scroll|exituntilcollapsed|snap">              <framelayout                 android:id="@+id/main.framelayout.title"                 android:layout_width="match_parent"                 android:layout_height="130dp"                 android:layout_gravity="bottom"                 android:background="#00000000"                 android:orientation="vertical"                 app:layout_collapsemode="parallax"                 app:layout_collapseparallaxmultiplier="0.3">                  <linearlayout                     android:id="@+id/main.linearlayout.title"                     android:layout_width="match_parent"                     android:layout_height="wrap_content"                     android:paddingleft="30dp"                     android:layout_gravity="left"                     android:orientation="vertical">                      <textview                         android:layout_width="wrap_content"                         android:layout_height="wrap_content"                         android:gravity="bottom"                         android:text="user name"                         android:id="@+id/username"                         android:textcolor="@android:color/white"                         android:textsize="30sp"/>                      <textview                         android:layout_width="wrap_content"                         android:layout_height="wrap_content"                         android:layout_margintop="4dp"                         android:id="@+id/business"                         android:text="users business"                         android:textcolor="@android:color/white"/>                 </linearlayout>              </framelayout>              <android.support.v7.widget.toolbar                 android:id="@+id/main.toolbar"                 android:layout_width="match_parent"                 android:layout_height="110dp"                 android:background="#00000000"                 app:theme="@style/themeoverlay.appcompat.dark.actionbar"                 app:title=""                 app:layout_collapsemode="pin">                  <linearlayout                     android:layout_width="wrap_content"                     android:layout_height="match_parent"                     android:orientation="horizontal">                      <imageview                         android:layout_width="32dp"                         android:layout_height="32dp"                         android:id="@+id/back"                         android:layout_margintop="10dp"                         android:background="@drawable/ic_arrow_back"/>                      <textview                         android:id="@+id/main.textview.title"                         android:layout_width="wrap_content"                         android:layout_height="wrap_content"                         android:padding="12dp"                         android:text="user name"                         android:textcolor="@android:color/white"                         android:textsize="24sp"                         />                  </linearlayout>             </android.support.v7.widget.toolbar>             <android.support.design.widget.tablayout                 android:id="@+id/tabs"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:background="#00000000"                 android:layout_gravity="bottom"                 app:tabmode="fixed"                 app:tabgravity="fill"                 app:theme="@style/themeoverlay.appcompat.dark.actionbar"/>          </android.support.design.widget.collapsingtoolbarlayout>      </android.support.design.widget.appbarlayout>      <android.support.v4.widget.nestedscrollview         android:layout_width="match_parent"         android:layout_height="match_parent"         app:layout_behavior="@string/appbar_scrolling_view_behavior"         android:layout_gravity="fill_vertical"         android:fillviewport="true"         android:layout_marginbottom="110dp">               <android.support.v4.view.viewpager                 android:id="@+id/viewpager"                 android:layout_width="match_parent"                  android:layout_gravity="fill_vertical"                 android:layout_height="match_parent"                 android:background="@android:color/white">             </android.support.v4.view.viewpager>     </android.support.v4.widget.nestedscrollview> </android.support.design.widget.coordinatorlayout> 

now problem facing is, when run app on lower os versions, okay while scrolling in viewpager fragments recyclerviews, when use os above android.m, recyclerview's height out of display screen, , not visible enough see item on screen. please me resolve problem. have designed custom collapsing bar layout, okay in lower android os.

[edited]
here snapshots when add margin_bottom of actionbar size.
<--- snapshot end.
you can see viewpagers height less screen size using marginbottom.
now
for higher varients, okay below while using marginbottom.

thanks reviews , answers questions, after digging didnt found useful, , though set height programmatically. tried snippet below, , works charm. heigher varients, set marginbottom actionbar size in layout xml in nestedscrollview , lower varients, use hack below.

 nestedscrollingview nsv = findviewbyid(r.id.nsv);   if (android.os.build.version.sdk_int < android.os.build.version_codes.m){         android.support.design.widget.coordinatorlayout.layoutparams lpm = new android.support.design.widget.coordinatorlayout.layoutparams(                 android.support.design.widget.coordinatorlayout.layoutparams.match_parent, android.support.design.widget.coordinatorlayout.layoutparams.match_parent);         lpm.setmargins(0,0,0,0);         lpm.setbehavior(new android.support.design.widget.appbarlayout.scrollingviewbehavior());         nsv.setlayoutparams(lpm);         nsv.requestlayout();     } 

again, help.