NestedScrolling with NestedScrollView, RecyclerView (Horizontal), inside a CoordinatorLayout

Question

I have a UI design with CollapsingToolbarLayout, like following.

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="@dimen/detail_backdrop_height"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout

        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

    </android.support.design.widget.CollapsingToolbarLayout>

</android.support.design.widget.AppBarLayout>

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true"
    android:theme="@style/ThemeOverlay.AppCompat.Light"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingTop="24dp">

        <!-- Hiding unrelated code -->

        <android.support.v7.widget.CardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/card_margin"
            android:padding="16dp">


                <android.support.v7.widget.RecyclerView
                    android:id="@+id/recycler_movie_suggestion"
                    android:layout_width="match_parent"
                    android:layout_height="170dp"
                    android:fillViewport="true"
                    android:nestedScrollingEnabled="false"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

            </LinearLayout>

        </android.support.v7.widget.CardView>

    </LinearLayout>

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

My problem is, the scrolling is fine ONLY when I touch and scroll the area OUTSIDE the RecyclerView. If I try to scroll vertically inside the RecyclerView, the scrolling is "trapped" and ONLY the NestedScrollView is scrolling, the CollaspingToolbarLayout ISN'T collasping.

Answer 1

You need to disable nested scrolling programatically. It doesn't seem to work correctly if done in xml.

recyclerView.setNestedScrollingEnabled(false);