CollapsingToolbarLayout - проблема с плавной прокруткой с recylerview и панелью инструментов

Question

Я хочу использовать CollapsingToolbarLayout с RecyclerView и панелью инструментов.

Поэтому, когда я прокручиваю вверх / вниз, он запаздывает,

не может правильно прокручивать его очень медленно и медленно. пожалуйста, дайте мне правильное решение для этого. когда я буду прокручивать, это будет сильно отставать. в чем проблема об этом. Я проверил различные методы, но не смог достичь этого. Есть ли хороший способ, который может решить эту проблему?

здесь 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:layout_width="match_parent"
android:id="@+id/main_content"
android:layout_height="match_parent">


    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_scrollFlags="scroll|enterAlways"
        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="400dp"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_scrollFlags="scroll|enterAlways"
                app:layout_collapseMode="parallax" >

                <ImageView
                    android:id="@+id/ivItem"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    app:layout_scrollFlags="scroll|enterAlways"
                    android:scaleType="centerCrop"
                    app:layout_collapseMode="parallax" />

            </RelativeLayout>

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

                <include
                    android:id="@+id/toolbar_header_view"
                    layout="@layout/widget_header_view_top"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="gone" />

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

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

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

    <include
        android:id="@+id/float_header_view"
        layout="@layout/widget_header_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/scrollView"

 app:layout_behavior="com.simplysufixprs.net.custom.scrolling_activity.WhatsAppHeaderBehavior" />


    <android.support.v4.widget.NestedScrollView
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/bg_clr"
        android:layout_marginTop="@dimen/activity_margin_normal"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <include layout="@layout/content_main" />

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


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

content main:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:background="@color/bg_clr"
android:orientation="vertical">


<com.simplysufixprs.net.custom.views.NonScrollExpandableListView
    android:id="@+id/lvMenu"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:groupIndicator="@null"

    android:listSelector="@android:color/transparent"
    android:scrollbars="none"
    android:visibility="gone" />

<!-- your choice decs-->
 <LinearLayout
    android:visibility="gone"
    android:id="@+id/llYourChoice"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/bg_clr"
    android:orientation="vertical"
    android:padding="16dp">

    <com.simplysufixprs.net.custom.views.CTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="16dp"
        android:text="Desription"
        android:textColor="#bc3123"
        android:textSize="@dimen/txt_medium"
        app:fontName="@string/avennir_next" />

    <com.simplysufixprs.net.custom.views.CTextView
        android:id="@+id/tvYourChoice"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="2dp"
        android:textColor="@color/black"
        android:textSize="@dimen/txt_normal"
        app:fontName="@string/avennir_next" />


 </LinearLayout>
 <LinearLayout
    android:layout_width="match_parent"
    android:background="@color/bg_clr"
    android:layout_height="wrap_content">
 <android.support.v7.widget.RecyclerView
    android:id="@+id/rvOptions"
    android:background="@color/bg_clr"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>
 </LinearLayout>
 <!-- inflate recycler view for option innerOptionItems-->
 <LinearLayout
    android:id="@+id/llOptionView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#efefef"
    android:orientation="vertical"
    android:paddingLeft="16dp"
    android:paddingTop="16dp"
    android:paddingRight="16dp">

 </LinearLayout>


 <com.simplysufixprs.net.custom.views.CTextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp"
    android:text="Quantity"
    android:textColor="#bc3123"
    android:textSize="@dimen/txt_medium"
    app:fontName="@string/avennir_next" />
 <android.support.v4.widget.NestedScrollView
 android:layout_width="match_parent"
 android:layout_height="wrap_content">
 <LinearLayout
    android:id="@+id/llQuanitySelection"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <RelativeLayout
        android:id="@+id/rlQuantitySelection"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:background="@drawable/rounded_rect_cart_quantity"
        android:padding="10dp">

        <RelativeLayout
            android:id="@+id/rlMinus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:background="@drawable/button_radius_with_solid_color">

            <com.simplysufixprs.net.custom.views.CTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="+"
                android:textColor="@color/white"
                android:textSize="@dimen/txt_large"
                android:visibility="invisible"
                app:fontName="@string/avennir_next" />

            <com.simplysufixprs.net.custom.views.CTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:padding="10dp"
                android:text="-"
                android:textColor="@color/white"
                android:textSize="@dimen/txt_large"
                app:fontName="@string/avennir_next" />
        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/rlPlus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:background="@drawable/button_radius_with_solid_color">

            <com.simplysufixprs.net.custom.views.CTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:text="+"
                android:textColor="@color/white"
                android:textSize="@dimen/txt_large"
                app:fontName="@string/avennir_next" />
        </RelativeLayout>


        <com.simplysufixprs.net.custom.views.CTextView
            android:id="@+id/tvQty"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:padding="10dp"
            android:text="1"
            android:textColor="@color/black"
            android:textSize="@dimen/txt_large"
            app:fontName="@string/avennir_next" />

    </RelativeLayout>




    <com.simplysufixprs.net.custom.views.CTextView
        android:id="@+id/tvAddToCart"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginRight="16dp"
        android:layout_marginBottom="16dp"
        android:background="@drawable/button_radius_with_solid_color"
        android:gravity="center"
        android:padding="16dp"
        android:text="Add to Cart"
        android:textColor="@color/white"
        android:textSize="@dimen/txt_large"
        app:fontName="@string/avennir_next" />
 </LinearLayout>
 </android.support.v4.widget.NestedScrollView>


 </LinearLayout>