android - Stop Scrolling for CollapsingToolbarLayout when showing a Fragment -

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i have viewpager inside activity shows 2 fragments.

the activity has tablayout , collapsingtoolbarlayout. collapsingtoolbarlayout nested inside appbarlayout imageview produce parallax effect. tablayout outside appbarlayout inside linearlayout viewpager. there framelayout show fragment on viewpager when user clicks button show fragment.

the problem when scroll recyclerview inside fragment overlays on top of viewpager activity scrolls , parallax effect. scrolls both recyclerview inside fragment , content inside viewpager well.

is there way stop scrolling collapsingtoolbarlayout , scroll content in overlay fragment when user sees fragment?

this xml hierarchy looks like:

<android.support.design.widget.coordinatorlayout>  <android.support.design.widget.appbarlayout>      <android.support.design.widget.collapsingtoolbarlayout         app:layout_scrollflags="scroll|exituntilcollapsed">          <imageview             app:layout_collapsemode="parallax"/>          <android.support.v7.widget.toolbar />      </android.support.design.widget.collapsingtoolbarlayout>  </android.support.design.widget.appbarlayout>  <linearlayout     app:layout_behavior="@string/appbar_scrolling_view_behavior" >      <android.support.design.widget.tablayout />     <!-- 2 fragments inside viewpager each containing recyclerview -->     <android.support.v4.view.viewpager />  </linearlayout>  <!-- user clicks button , fragment added framelayout --> <!-- fragment overlays on top of entire activity layout --> <!-- fragment contains recyclerview --> <framelayout/>   </android.support.design.widget.coordinatorlayout>

the coordinatorlayout , appbarlayout operate via onnestedscroll callbacks children. if have scrolling child, can stop effecting parent/s disabling callback:

recyclerview.setnestedscrollingenabled(false);

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