Develop Reference

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>

RecyclerView: fill screen heigth when AppBarLayout scrolls up (hides)

I have AppBarLayout with toolbar and 2 buttons. It hides when I scroll RecyclerView up and shows when I scroll down.
The problem is that RecyclerView is set to be below AppBarLayout and preserves its position when AppBarLayout hides and I have condition shown on the picture. I need my RecyclerView to scroll up to the statusbar as well, and return to original position on scroll down. So far I could not even find an example of that.
Thank you.
This is mt layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="ru.skyeng.listening.AudioFiles.AudioListActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
app:elevation="0dp">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
>
<ImageButton
android:id="#+id/action_settings"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/gear"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_gravity="end"/>
</android.support.v7.widget.Toolbar>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/button_category"
android:layout_width="158dp"
android:layout_height="36dp"
android:layout_margin="16dp"
android:background="#drawable/selector_button_category"
android:text="#string/categories"
android:textColor="#color/colorBlue2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<Button
android:id="#+id/button_length"
android:layout_width="158dp"
android:layout_height="36dp"
android:layout_margin="16dp"
android:background="#drawable/selector_button_length"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:text="#string/length"
android:textColor="#color/colorBlue2"/>
<View
android:id="#+id/shadow"
android:layout_below="#+id/button_length"
android:layout_width="match_parent"
android:layout_height="20dp"
android:background="#drawable/shadow">
</View>
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:layout_below="#+id/appBarLayout"
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="24dp">
</FrameLayout>
</RelativeLayout>

If you want an image to show on bellow the toolbar. You should try CollpsingLayoutToolbar.
Here is an example. I hope this helps
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:elevation="0dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapsedTitleGravity="left"
app:expandedTitleGravity="bottom|right"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleTextAppearance="#style/CollapsedAppBarStyle"
app:layout_scrollFlags="scroll"
app:title="#string/pod">
<ImageView
android:id="#+id/collapsing_ImageView"
android:layout_width="match_parent"
android:layout_height="256dp"
android:contentDescription="#string/app_name"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/bg_image"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:minHeight="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Extra space between Collapsing Toolbar Title and Home/Up button

I'm trying to use Collapsing Toolbar with Home/Up button. After toolbar collapses, there is an extra space between arrow and title text, which I'd like to get rid of. I attached two images, with and without layoutboundaries, to illustrate my point.
I searched StackOverflow and everywhere and tried
android:contentInsetStart="0dp"
in vain.
Here is my layout XML file.
<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:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="300dp"
android:background="?colorPrimary"
app:elevation="4dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorPrimary"
app:collapsedTitleTextAppearance=
"#style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleTextAppearance=
"#style/TextAppearance.ExpandedTitle"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:title="Toolbar Title">
<ImageView
android:id="#+id/collapsing_toolbar_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="88dp"
android:contentDescription="#string/app_name"
android:scaleType="centerCrop"
android:src="#drawable/glider"
app:layout_collapseMode="parallax"
/>
<View
android:id="#+id/toolbar_title_scrim"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_alignBottom="#+id/collapsing_toolbar_background"
android:layout_gravity="bottom"
android:background="#android:color/holo_green_light"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:text="test text"
android:textColor="#android:color/white"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:contentInsetStart="0dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:scrollbarStyle="outsideOverlay"/>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.design.widget.CoordinatorLayout>

It turned out that this is part of a new Material Design Specification introduced in version 24 of Design library.
https://material.google.com/patterns/navigation.html
However, it is possible to remove the extra space by adding the following property to Toolbar widget.
app:contentInsetStartWithNavigation="0dp"

collapse CollapsingToolbarLayout COMPLETELY

I use CollapsingToolbarLayout in an AppBarLayout only for its parallax effect while scrolling, so I need to collapse the layout completely. I mean set its height to zero after scrolling down. I set the layout minHeight to 0dp but doesn't work, and still have some part of layout visible.
<?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/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="40dp"
android:paddingRight="40dp"
android:paddingLeft="40dp"
android:background="#e91e63"
android:fitsSystemWindows="true"
android:minHeight="0dp"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minHeight="0dp"
android:fitsSystemWindows="true"
app:titleEnabled="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/index_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/suitcase"
android:padding="20dp"
android:background="#drawable/index_page_icon_bg"
android:layout_margin="5dp"
app:layout_collapseMode="parallax"/>
</LinearLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="0dp"
android:minHeight="0dp"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</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"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
General Rule: If you think this is not a good Q, declare at comments then do whatever you like!

Change the AppBarLayout like this .
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#e91e63"
android:fitsSystemWindows="true"
android:minHeight="0dp"
android:theme="#style/AppTheme.AppBarOverlay">
an the ImageView will be like this .
<LinearLayout
android:paddingTop="40dp"
android:paddingRight="40dp"
android:paddingLeft="40dp"
android:scaleType="fitXY"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.4"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/index_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/suitcase"
android:padding="20dp"
android:background="#drawable/index_page_icon_bg"
android:layout_margin="5dp" />
</LinearLayout>
The problem was, you make a padding top in the AppBarLayout , so when it collapse it still make the 40dp padding , so the layout can't make Full collapse.

CollapsingToolbarLayout do not expand after screen orientation change

There is activity in my application with header with background image and a title/beginning time of event. Below there is description of event.
<?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="256dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<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"
app:expandedTitleMarginStart="72dp"
app:expandedTitleMarginBottom="90dp"
app:expandedTitleMarginEnd="16dp"
app:expandedTitleTextAppearance="#style/ExpandedAppBar">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax">
<ImageView
android:id="#+id/event_cover"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"/>
<LinearLayout
android:id="#+id/event_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="bottom"
android:background="#color/actionbar_color"
android:paddingTop="16dp"
android:paddingRight="16dp"
android:paddingBottom="16dp"
android:paddingLeft="72dp">
<TextView
android:id="#+id/event_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:textColor="#android:color/white"
android:maxLines="2"
android:ellipsize="end"/>
<TextView
android:id="#+id/event_begin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textColor="#aaa"/>
</LinearLayout>
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/actionbar_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin"/>
</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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
app:layout_scrollFlags="scroll|enterAlways">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/event_desc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="16dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:paddingLeft="72dp"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:id="#+id/event_action_btn"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
app:layout_anchor="#id/appbar"
app:layout_anchorGravity="bottom|left"
android:layout_margin="#dimen/event_fab_margin"
app:borderWidth="0dp"
app:fabSize="mini"
android:clickable="true"/>
</android.support.design.widget.CoordinatorLayout>
And now I have strange buggy behaviour of CollapsingToolbarLayout. Following conditions are reproduced it:
1. In portrate orientation text of the description fits on a screen, so NestedScrollView can't scroll its content and CollapsingToolbarLayout do not collapse header
In landscape orientation text of the description doesn't fit on a screen, so NestedScrollView can scroll content and it appears ability to collapse header
In landscape orientation I collapse header (screen 3) and change screen orientation to portrate. Header stay collapsed and no posibility to expand it and header appears again (screen 4). In some cases under such manipulations Home button of Toolbar dissappear.
screen 3
screen 4
I use following versions of libraries: design support library - v22.2.1, appcompat-v7 - v23.0.1