Develop Reference

How to make CollapsingToolbarLayout disappear completely after scrolling?

I'm trying to make a fragment "head" with two toolbars and horizontal scroll view between them. I want to make horizontal scroll view completely disappear after scrolling down but after scrolling there some black space and i don't know why. What attributes should i type to make it?
Here is my layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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_height="match_parent"
android:layout_width="match_parent">
<androidx.appcompat.widget.Toolbar
android:id="#+id/tool"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:foregroundGravity="center"
android:src="#drawable/ic_arrow" />
</androidx.appcompat.widget.Toolbar>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:clipToPadding="false"
android:fitsSystemWindows="true"
app:layout_constraintTop_toBottomOf="#id/tool"
tools:context=".ui.menu.MenuFragment">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="220dp"
android:fitsSystemWindows="true"
android:theme="#style/Theme.PizzaTime.AppBarOverlay">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_collapseMode="parallax"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<HorizontalScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
<androidx.appcompat.widget.Toolbar
android:id="#+id/support_action"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
app:layout_collapseMode="pin"
app:popupTheme="#style/Theme.PizzaTime.PopupOverlay">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:foregroundGravity="center"
android:src="#drawable/ic_arrow" />
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<include layout="#layout/scroll_content" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

After I deleted the following line from CoordinatorLayout:
android:fitsSystemWindows="true"
It started working correctly, hope it will be helpful for someone.

How to put a custom view/layout pinned in CollapsingToolbarLayout ?

Background
The support/design library allows to have a nice resize-as-you-scroll effect, using AppBarLayout and CollapsingToolbarLayout :
http://material-design.storage.googleapis.com/publish/material_v_3/material_ext_publish/0B0NGgBg38lWWcFhaV1hiSlB4aFU/patterns-scrollingtech-scrolling-070801_Flexible_Space_xhdpi_003.webm
The problem
All examples I've seen are of Toolbar being the one pinned as you scroll.
What I'm trying to achieve is that a custom view will be pinned, in a size of a toolbar, while the content above it (some other views) will shrink as you scroll.
Something like that:
Thing is, no matter what I try, something doesn't work this way. Sometimes the content of the toolbar-replacement gets truncated, sometimes it doesn't get pinned, etc...
What I've tried
Since for some reason the Toolbar is the only thing that seems to work well with the app:layout_collapseMode="pin" attribute, I tried to either put views in it, or put views with it.
Here's the current XML layout of what I've tried:
<?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"
android:fitsSystemWindows="true"
tools:context=".ScrollingActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:background="#fff"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:padding="0px"
app:contentScrim="#eeeeee"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<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/AppTheme.PopupOverlay"
app:title="">
</android.support.v7.widget.Toolbar>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="bottom"
android:layout_marginBottom="0px"
android:background="#33ff0000"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="#+id/titleTextView"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="#33ffff00"
android:gravity="center"
android:text="someText"
android:textColor="#000"/>
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_scrolling"/>
</android.support.design.widget.CoordinatorLayout>
Sadly, even though the layout editor shows that it looks ok, what I actually see is this truncated text for the toolbar-replacement view:
I also tried using layout_anchor, as shown on a sample of how to use it (here), but even then, the view that is supposed to replace the toolbar seems to overlap the content that's supposed to be below it and the one above it, and even the view that's above it have some space below it that isn't supposed to be there:
And here's the XML layout of this try:
<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">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3300ff00"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="200dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<FrameLayout
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:orientation="vertical"
android:paddingBottom="?attr/actionBarSize"
app:layout_collapseMode="none">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:text="need to be right above 'someText'"
android:textColor="#ff000000"/>
</FrameLayout>
</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"
android:scrollbars="none"
app:behavior_overlapTop="0dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/lorem"/>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#33ff0000"
app:layout_anchor="#id/title"
app:layout_anchorGravity="bottom"
app:theme="#style/ThemeOverlay.AppCompat.Dark"
app:title="">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:text="someText"
android:textColor="#android:color/white"
android:textSize="20sp"/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CoordinatorLayout>
The questions
How can I put custom views so that the toolbar content will stay between the bottom and upper areas, not overlapping any of them, and have the area above the toolbar to shrink as you scroll ?

For now, I'm using a workaround for this issue, by using padding that will prevent the overlapping of the views. I still don't get why the views overlap, but this helps against it.
The problem with this, is that now the toolbar doesn't have a shadow when I scroll enough so that it's the only thing that appears at the top.
Here's a sample XML layout, in case anyone wants to try:
<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">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3300ff00"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="200dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<FrameLayout
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="bottom|center_horizontal"
android:orientation="vertical"
android:paddingBottom="24dp"
app:layout_collapseMode="none">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="#f00"/>
</FrameLayout>
</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"
android:paddingTop="24dp"
android:scrollbars="none"
app:behavior_overlapTop="0dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/lorem"/>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="#33ff0000"
app:layout_anchor="#id/title"
app:layout_anchorGravity="bottom"
app:theme="#style/ThemeOverlay.AppCompat.Dark"
app:title="">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:text="someText"
android:textColor="#android:color/white"
android:textSize="20sp"/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CoordinatorLayout>

Scroll problems - CoordinatorLayout + AppBarLayout + ViewPager with Fragments containing RecyclerViews

I have the following layout:
<CoordinatorLayout layout_height="match_parent">
<AppBarLayout layout_height="match_parent">
<CollapsingToolbarLayout layout_height="match_parent">
<ImageView> //Fullscreen picture
<LinearLayout> //Some text and icons
<Toolbar layout_height="?attr/actionBarSize"> //No title
<TabLayout layout_height="?attr/actionBarSize"> //Drawn on top of the invisible Toolbar
</CollapsingToolbarLayout>
</AppBarLayout>
<ViewPager layout_height="wrap_content"/>
<FloatingActionButton/>
</CoordinatorLayout>
Now, the ViewPager has 3 fragments, each with a RecyclerView inside it. I believe this should be a regular design pattern. The ViewPager sits below the AppBarLayout, which starts full screen, so you have to scroll down to see the ViewPager content.
The problem is when I fling on the AppBarLayout, the fling event prevents any further scroll until it stops flinging (until velocityY = 0). But this takes up to 2 or 3 seconds sometimes, so in the meanwhile, the touchpad remains unresponsive.
What is worse, if I try to scroll on one of the children RecyclerViews, the screen will flicker so badly and the RecyclerView will suddenly appear at the scrolled position once the AppBarLayout fling has ended. This is horrible!
I've already tested this smooth AppBarLayout library and while it fixes some issues, it introduces some other bad ones (the ViewPager is drawn on top of everything, and not below the TabLayout).
UPDATE: FULL 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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".ActivityActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<!-- ALSO TRIED app:layout_behavior="com.package.utils.FlingBehavior" -->
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="4dp"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleGravity="center|top"
app:expandedTitleMarginTop="#dimen/activity_horizontal_margin_extra"
app:expandedTitleMarginBottom="70dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/background_picture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:tintMode="screen"
app:layout_collapseMode="parallax" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="vertical"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.8">
<TextView
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Probando probando"
android:textColor="#color/white" />
<android.support.v4.widget.Space
android:layout_width="match_parent"
android:layout_height="120dp" />
<ImageView
android:id="#+id/icon"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="bottom|center"
android:fitsSystemWindows="true"
android:paddingBottom="#dimen/activity_horizontal_margin" />
<TextView
android:id="#+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center"
android:layout_marginBottom="100dp"
android:fitsSystemWindows="true" />
</LinearLayout>
<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/AppTheme.PopupOverlay" />
<android.support.design.widget.TabLayout
android:id="#+id/activities_options_tabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:scrollbars="horizontal"
app:tabMode="fixed"
app:tabContentStart="48dp"
app:layout_scrollFlags="scroll|enterAlways"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/activities_options_container"
android:layout_width="match_parent"
android:focusable="false"
android:layout_marginTop="0dp"
android:visibility="visible"
android:elevation="4dp"
app:behavior_overlapTop="20dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_height="wrap_content" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end"
app:srcCompat="#drawable/ico_share" />
</android.support.design.widget.CoordinatorLayout>
AND ONE OF THE FRAGMENTS, THEY ARE ALL THE SAME:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/root_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal">
<ProgressBar
android:id="#+id/progress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="#dimen/activity_vertical_margin_large"
android:visibility="invisible"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</RelativeLayout>
Help!
Thanks

i used this for the same purpose
<?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"
android:gravity="right"
android:orientation="vertical"
tools:context="com.cafeagahi.app.AccountActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="right"
app:tabGravity="fill"
app:tabMode="fixed"
app:tabTextColor="#color/white" />
<android.support.v4.view.ViewPager
android:id="#+id/vp_pages"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>

RecyclerView inside NestedScrollView Android

Iam trying to place a RecyclerView inside a NestedScrollView. The problem is that if I place the RecyclerView inside a horizontal LinearLayout, the recycler view shows. But if I place it into Vertical LinearLayout it doesnot show up. Here is something that I have tried:
<?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:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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:expandedTitleMarginBottom="32dp"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="80dp">
<android.support.v7.widget.Toolbar
android:id="#+id/anim_toolbar"
android:layout_width="match_parent"
android:layout_height="20dp"
android:background="#color/AppBrightRed"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/ic_appicon"
android:layout_marginLeft="10dp"
android:layout_gravity="bottom|left" />
</FrameLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="vertical">
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="200dp"
android:name="com.google.android.gms.maps.MapFragment"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_marginTop="10dp">
<AutoCompleteTextView
android:layout_height="wrap_content"
android:layout_width="180dp"
android:hint="LOCATION"
android:id="#+id/ATView" />
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Checkin"
android:textColor="#color/AppBackground"
android:id="#+id/btnCheckin"
android:background="#color/AppBrightRed" />
<android.support.v7.widget.RecyclerView ----DOES NOT SHOW IF PLACED HERE
android:id="#+id/recyclerView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
How can I solve this?

you can use LinearLayout instead of NestedScrollView:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
/>
</LinearLayout>

You could take a look at : How to use RecyclerView inside NestedScrollView?
By the way, it won't work i've tried everything you can even imagine it.
But, you have these options:
1. Using a Library like
https://github.com/serso/android-linear-layout-manager
2. Or, implementing your own custom LinearLayoutManager
3. or Using app:layout_behavior="#string/appbar_scrolling_view_behavior"
on both.(perhaps it will works)
And of coure, you could use that inside CoordinatorLayout and outside the NestedScrollView.
Check this answer: https://stackoverflow.com/a/34951558/4409113

Clickable CardView inside NestedScroll doesn't trigger scrolling

I have a layout with a CoordinatorLayout, and AppBarLayout and a NestedScrollView, inside the NestedScrollView I have multiple CardViews, everything works ok until I set the CardViews to be clickable, then if I start a scroll within a CardView, scroll doesn't work.
This is my layout:
<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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_height="256dp"
android:layout_width="match_parent"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
app: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"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary">
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
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:id="#+id/nestedScroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_gravity="fill_vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="0dp"
app:cardUseCompatPadding="true">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="80dp"
android:layout_height="80dp"
android:background="#color/primary" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="4dp"
android:paddingLeft="7dp"
android:paddingRight="7dp"
android:paddingBottom="7dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="1"
android:includeFontPadding="false"
android:text="Title1"
style="#android:style/TextAppearance.Medium" />
<TextView
android:lines="2"
android:text="Description 1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
...
</LinearLayout>
</android.support.v4.widget.NestedScrollView>

The issue comes to daylight when the ScrollView isn't filled with content. I think it's a very weird bug in Android.
The 'solution'..
<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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_height="256dp"
android:layout_width="match_parent"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
app: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"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary">
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
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:id="#+id/nestedScroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_gravity="fill_vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="0dp"
app:cardUseCompatPadding="true"
android:foreground="?android:attr/selectableItemBackground"
android:clickable="true">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="80dp"
android:layout_height="80dp"
android:background="#cdcdcd"
android:clickable="true"/>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="4dp"
android:paddingLeft="7dp"
android:paddingRight="7dp"
android:paddingBottom="7dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="1"
android:includeFontPadding="false"
android:text="Title1"
style="#android:style/TextAppearance.Medium"/>
<TextView
android:lines="2"
android:text="Description 1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="1000dp"
android:orientation="vertical"
android:layout_margin="4dp"
android:background="#c1c1c1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20pt"
android:text="some content..."/>
</LinearLayout>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

It seems like the same problem as here: Scroll doesn't work in NestedScrollView when try to scroll from views with click events
This is the kind of workaround for your problem
https://stackoverflow.com/a/32887429/2165810
But you shuld also use setPreventCornerOverlap(false) for your CardView to avoid problems with CardView

As people have noted, the problem is when the CardView sits fully within the screen it won't trigger scrolling from the card. Scrolling still works from views within the CollapsingToolbarLayout.
My solution was to add android:layout_marginBottom="100dp" to the CardView so that the bottom edge is offscreen thus allowing scrolling.