Develop Reference

How to use RecyclerView with CollapsingToolbarLayout. RecyclerView need load more data when bottom reached

My problem is, i want use RecyclerView with CollapsingToolbarLayout. But the issue is CollapsingToolbarLayout not scrolling when RecyclerView scrolling. I cant use Nested Scroll to put RecyclerView, because i want load more data to RecyclerView
<android.support.design.widget.AppBarLayout
android:id="#+id/collapsing_toolbar_appbarlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?themeColorBack">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:contentScrim="?themeColorBack"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/image_contain_relative"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="invisible">
<android.support.constraint.ConstraintLayout
android:id="#+id/first_image_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/first_post"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="10dp"
android:adjustViewBounds="true"
android:contentDescription="#string/latest_post"
android:scaleType="fitXY"
app:layout_constraintDimensionRatio="H,16:9"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/first_image_container"
android:background="#bb000000"
android:orientation="vertical">
<TextView
android:id="#+id/first_image_category"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:paddingLeft="8dp"
android:paddingStart="8dp"
android:textColor="#color/white"
android:textSize="14sp"
tools:ignore="RtlSymmetry" />
<TextView
android:id="#+id/first_image_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="4dp"
android:paddingLeft="8dp"
android:paddingStart="8dp"
android:textColor="#color/white"
android:textSize="14sp"
tools:ignore="RtlSymmetry" />
</LinearLayout>
</RelativeLayout>
<TextView
android:id="#+id/first_post_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:textColor="?themeHeadColorText"
android:textSize="16sp"
android:textStyle="bold" />
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<!-- app:layout_behavior attribute value settings make app tool bar appear while RecyclerView scroll. -->
<android.support.v7.widget.RecyclerView
android:id="#+id/post_recycle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="60dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />

Try like this I hope this will be full fill your requirements.
<?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/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_width="match_parent"
android:layout_height="250dp"
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="#android:color/transparent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:statusBarScrim="#android:color/transparent">
<ImageView
android:id="#+id/ivFeature"
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"
android:background="#android:color/transparent"
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/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:overScrollMode="never"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/card_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>

You can use like this.
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myCoordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="#layout/layout_toolbar" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="4dp" />
</LinearLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="18dp"
android:src="#drawable/ic_add" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>

"Shrink" CardView while scrolling in another view

Screenshot
As you can see, the layout is a bit too big for the older device. My idea is to shrink the CardView while the user is scrolling in the white area (ViewPager) to make it bigger. I have seen it working well in another app (can't remember which). I have no idea how I can do it, do I need write it programmatically?
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".WordActivity">
<WebView
android:id="#+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="20dp"
android:visibility="gone" />
<android.support.v7.widget.CardView
android:id="#+id/cardView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="0dp"
app:cardBackgroundColor="#color/primary_dark"
app:cardCornerRadius="0dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp">
<TextView
android:id="#+id/wordTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/poweredBy"
android:layout_centerInParent="true"
android:layout_marginTop="-12dp"
android:fontFamily="#font/poppins"
android:text="#string/word_title"
android:textColor="#android:color/white"
android:textSize="30sp" />
<TextView
android:id="#+id/wordTranslated"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/wordTitle"
android:layout_alignStart="#id/wordTitle"
android:layout_marginTop="-10dp"
android:fontFamily="#font/poppins"
android:textColor="#android:color/darker_gray"
android:textSize="16sp" />
<TextView
android:id="#+id/poweredBy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:fontFamily="#font/bungee_hairline"
android:text="#string/powered"
android:textColor="#android:color/darker_gray"
android:textSize="16sp" />
</RelativeLayout>
</android.support.v7.widget.CardView>
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/cardView">
<android.support.design.widget.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="#color/primary"
android:elevation="5dp"
app:tabIndicatorColor="#android:color/white"
app:tabIndicatorHeight="2dp"
app:tabPaddingEnd="-1dp"
app:tabPaddingStart="-1dp"
app:tabSelectedTextColor="#android:color/white"
app:tabTextColor="#color/white_transparent" />
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="45dp" />
</android.support.design.widget.CoordinatorLayout>
</RelativeLayout>

try again with this sample layout.
activity_main2.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:expandedTitleTextAppearance="#android:color/transparent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:layout_width="match_parent"
android:layout_height="170dp"
android:background="#drawable/bckg_toolbar"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
app:layout_collapseMode="pin"
app:popupTheme="#style/Theme.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#202020"
app:layout_anchorGravity="top|center"
app:tabGravity="fill"
app:tabIndicatorColor="#FBA601"
app:tabMode="fixed"
app:tabSelectedTextColor="#FBA601"
app:tabTextColor="#fff" />
</LinearLayout>
</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"/>
scene 1
scene 2

It may not be applicable to your current layout but if you can integrate Android's collapsing toolbars you may save youself a bit of time.
Otherwise you could use something like this to detect when the user is at the top of your list and show the view, hiding it otherwise

Try this sample layout, just change the code inside nested scrollview with your tablayout
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<android.support.design.widget.CoordinatorLayout
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:theme="#style/Theme.AppCompat.Light.NoActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:expandedTitleTextAppearance="#android:color/transparent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:layout_width="match_parent"
android:layout_height="170dp"
android:background="#drawable/bckg"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
app:layout_collapseMode="pin"
app:popupTheme="#style/Theme.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="match_parent"
android:clipToPadding="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/textLoremIpsum"/>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
Here is my sample screenshot
Scene 1
Scene 2

pin two elements in Coordinator layout

I am using CoordinatoLayout to try to achieve something like this:
This is my initial view
Scrolled up
I am using Coordinator layout this way but I am a bit confused about it, ¿is it the right way to achieve it? I have tried different ways but I only get one textview pinned on top.
<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/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false">
<LinearLayout
android:id="#+id/toolbar_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_collapseMode="parallax">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_pending_request_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="#dimen/app_double_padding"
android:paddingRight="#dimen/app_double_padding" />
</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" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="#dimen/app_padding"
android:layout_marginTop="#dimen/app_padding"
android:layout_weight="1"
android:gravity="center_vertical"
android:paddingLeft="#dimen/app_double_padding"
android:paddingRight="#dimen/app_double_padding">
<com.vipera.onepay.ui.component.custom.CustomTextViewRegular
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:text="#string/payment_request_pending_request_text"
android:textAllCaps="true"
android:textSize="#dimen/txt_content_10" />
<com.vipera.onepay.ui.component.custom.CustomButtonLight
style="#style/ButtonSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:background="#drawable/btn_rounded_gradient"
android:paddingEnd="#dimen/payment_request_small_btn_side_small_padding"
android:paddingStart="#dimen/payment_request_small_btn_side_small_padding"
android:text="#string/payment_request_movements_btn"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:textSize="#dimen/txt_content_10" />
</RelativeLayout>
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorColor="?attr/colorAccent">
</android.support.design.widget.TabLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="#dimen/app_padding"
android:layout_marginTop="#dimen/app_double_padding"
android:layout_weight="1"
android:gravity="center_vertical"
android:paddingLeft="#dimen/app_double_padding"
android:paddingRight="#dimen/app_double_padding">
<com.vipera.onepay.ui.component.custom.CustomTextViewRegular
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:text="#string/payment_request_rejected_request_text"
android:textAllCaps="true"
android:textSize="#dimen/txt_content_10" />
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_rejected_request_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="#dimen/app_double_padding"
android:paddingRight="#dimen/app_double_padding" />
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
Can somebody explain how to get this? Thanks in advance

Avoid scrolling in bottom view inside ViewPager inside CoordinatorLayout

I have this structure in my main layout
<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="wrap_content"
android:fitsSystemWindows="true"
tools:context="com.pingvalue.example.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<include
android:id="#+id/linear_header"
layout="#layout/product_detail_header" />
<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.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
and this is my layout that I'm using in a fragment inside ViewPager
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="6dp">
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableRight="#drawable/ic_insert_emoticon_black_24px"
android:gravity="center_vertical"
android:hint="#string/what_do_you_want_to_say"
android:textSize="16sp" />
<Button
android:layout_width="40dp"
android:layout_height="30dp"
android:layout_marginLeft="6dp"
android:background="#drawable/ic_send_selector"
android:enabled="false" />
</LinearLayout>
</LinearLayout>
I want to achieve the following behaviour. This is a screenshot when AppBarLayout is collapsed:
As you can see the layout with the EditText and Button is visible, but when I scroll up it disappears. I've try with a custom CoordinatorLayout behaviour but it doesn't work because it is not a direct child from my CoordinatorLayout. I've try also changing match_parent to wrap_content but it put empty space below the LinearLayout.

Put the LinearLayout with your EditText in it outside of the CoordinatorLayout and wrap everything in a LinearLayout.
<LinearLayout
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:orientation="vertical"
tools:context="com.pingvalue.example.MainActivity">
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=1>
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<include
android:id="#+id/linear_header"
layout="#layout/product_detail_header" />
<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.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="6dp">
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableRight="#drawable/ic_insert_emoticon_black_24px"
android:gravity="center_vertical"
android:hint="#string/what_do_you_want_to_say"
android:textSize="16sp" />
<Button
android:layout_width="40dp"
android:layout_height="30dp"
android:layout_marginLeft="6dp"
android:background="#drawable/ic_send_selector"
android:enabled="false" />
</LinearLayout>
</LinearLayout>
This should allow you to have your composer area always visible no matter how far you have scrolled the header.

Try with following layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="6dp"
android:layout_weight="0">
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableRight="#drawable/ic_insert_emoticon_black_24px"
android:gravity="center_vertical"
android:hint="#string/what_do_you_want_to_say"
android:textSize="16sp" />
<Button
android:layout_width="40dp"
android:layout_height="30dp"
android:layout_marginLeft="6dp"
android:background="#drawable/ic_send_selector"
android:enabled="false" />
</LinearLayout>
</LinearLayout>

I've tried also adding a NestedScrollView with no result

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.