android - AppBarLayout not collapsing during programmatically scroll -

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i have viewpager fragments containe recyclerviews. collapsingtollbarlayout above viewpager. everythings works fine except during programmatically scroll on recyclerview. appbarlayout or collapsingtoolbarlayout doesn't responde.

here base layout xml:

<?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" android:id="@+id/coordinatorlayout" android:layout_width="match_parent" android:layout_height="match_parent" android:fitssystemwindows="true">  <android.support.design.widget.appbarlayout     android:id="@+id/appbarlayout"     android:layout_width="match_parent"     android:layout_height="256dp"     android:fitssystemwindows="true"     android:theme="@style/themeoverlay.appcompat.dark.actionbar"     app:layout_behavior="de.wackernagel.playball.ui.flingbehaviour">      <android.support.design.widget.collapsingtoolbarlayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:fitssystemwindows="true"         android:id="@+id/collapsingtoolbarlayout"         app:contentscrim="?attr/colorprimary"         app:titleenabled="false"         app:layout_scrollflags="scroll|exituntilcollapsed">          <imageview             android:contentdescription="@null"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:scaletype="centercrop"             android:src="@drawable/showdown"             app:layout_collapsemode="parallax"/>          <android.support.v7.widget.toolbar             android:id="@+id/toolbar"             android:layout_width="match_parent"             android:layout_height="@dimen/doubleactionbarsize"             android:minheight="?attr/actionbarsize"             android:gravity="top"             app:titlemargintop="14dp"             app:layout_collapsemode="pin"             app:popuptheme="@style/themeoverlay.appcompat.light"/>          <android.support.design.widget.tablayout             android:id="@+id/tablayout"             android:layout_width="match_parent"             android:layout_height="?attr/actionbarsize"             android:background="@android:color/transparent"             android:layout_gravity="bottom"             app:tabtextcolor="#beffffff"             app:tabselectedtextcolor="#ffffffff"             app:tabcontentstart="@dimen/keyline_2"             app:tabmode="scrollable" />      </android.support.design.widget.collapsingtoolbarlayout>  </android.support.design.widget.appbarlayout>  <android.support.v4.view.viewpager         android:id="@+id/viewpager"         android:layout_width="match_parent"         android:layout_height="match_parent"         app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

my goal collapse collapsingtoolbarlayout during programmatically scroll normal touch scroll.

i by

activity fragment @ current viewpager position     fragment layoutmanager recyclerview          layoutmanager scrolltoposition x

the scrolling behavior works on recyclerview collapsingtoolbarlayout doesn't responde.

edit

here layout of fragments:

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">  <de.wackernagel.playball.views.emptyawarerecyclerview     android:id="@+id/recyclerview"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingbottom="8dp" />  <textview     android:id="@android:id/empty"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:gravity="center"/> 

<android.support.v4.view.viewpager     android:id="@+id/htab_viewpager"     android:layout_width="match_parent"     android:layout_height="match_parent"     app:layout_behavior="@string/appbar_scrolling_view_behavior" />  <android.support.design.widget.appbarlayout     android:id="@+id/htab_appbar"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:fitssystemwindows="true"     app:layout_behavior="example.com.final.tabparallax.flingbehavior"     android:theme="@style/themeoverlay.appcompat.dark.actionbar">      <android.support.design.widget.collapsingtoolbarlayout         android:id="@+id/htab_collapse_toolbar"         android:layout_width="match_parent"         android:layout_height="360dp"         android:fitssystemwindows="true"         app:contentscrim="?attr/colorprimary"         app:layout_scrollflags="scroll|exituntilcollapsed">          <framelayout             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_gravity="center_horizontal"             android:padding="0dp">              <imageview                 android:id="@+id/htab_header"                 android:layout_width="match_parent"                 android:layout_height="359dp"                 android:background="@drawable/channel"                 android:fitssystemwindows="true"                 android:scaletype="centercrop"                 app:layout_collapsemode="parallax" />          </framelayout>      </android.support.design.widget.collapsingtoolbarlayout>      <android.support.design.widget.tablayout         android:id="@+id/htab_tabs"         android:layout_width="match_parent"         android:layout_height="?attr/actionbarsize"         android:background="@color/coloraccent1"         android:fitssystemwindows="true"         android:gravity="bottom"         app:tabgravity="center"         app:tabindicatorcolor="@android:color/white"         app:tabmode="scrollable"         app:tabselectedtextcolor="@android:color/white"         app:tabtextcolor="@android:color/white"         /> </android.support.design.widget.appbarlayout>


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