Develop Reference

How to use Collapsing Toolbar with TabLayout using Material and AndroidX components?

I'm trying to use both Toolbar and TabLayout with CollapsingToolbarLayout but I'm getting a very strange behavior with the tab layout. The idea is to have the TabLayout with a transparent background when the Toolbar is expanded, and when collapsed, to be under the Toolbar like any other Activity with both Toolbar and TabLayout.
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout"
android:theme="#style/Theme.MaterialComponents.Light.NoActionBar"
android:layout_width="match_parent"
android:layout_height="250dp">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="#color/primary"
app:expandedTitleTextAppearance="#style/CollapsingToolbarExpandedTitleTheme">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="#null"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"/>
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/toolbar_height"
app:titleTextAppearance="#style/ToolbarTitleTheme"
app:layout_collapseMode="pin"/>
<com.google.android.material.tabs.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="#dimen/toolbar_height"
android:layout_gravity="bottom">
<com.google.android.material.tabs.TabItem
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<com.google.android.material.tabs.TabItem
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</com.google.android.material.tabs.TabLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</androidx.core.widget.NestedScrollView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
UPDATE: Following the example mentioned by # ismail alaoui (https://android.jlelse.eu/parallax-scrolling-header-tabs-android-tutorial-2cc6e40aa257), the layout better, but the TabLayout is still WHITE. There's no Style associated with it.
UPDATE: Adding android:background="transparent" to the TabLayout, as #ismail suggested, solves this issue. I also added an style to the TabLayout (Widget.MaterialComponents.TabLayout.Colored) just to improve the layout.

i suggest you to follow this tutorial , it explain how to do what you are exactly looking for , it's not using androidx component , but you can use it the same way , enjoy !
edit :
add this to appBarLayout and TabLayout attribute :
android:background="#android:color/transparent"

How can I create an expanded toolbar with background image and a centered thumbnail?

I'm willing to create a custom toolbar for the main menu of an app I'm working on, like this:
https://i.stack.imgur.com/GJdjn.png.
It contains a background image and another centered image as thumbnail. It does not collapse and stays static until an item is selected inside one of the tabs.
I'm using Android Studio in the developing process, which can be a little rough to deal with layout, but I believe there's a solution that uses the material design features, but I couldn't find anything about that (besides the toolbar with a background image).
Thanks in advance.

You can customize the Toolbar widget to your needs. Use something like this:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_top"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize"
android:background="#color/action_bar_bkgnd"
app:theme="#style/ToolBarTheme" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Toolbar Title"
android:layout_gravity="center"
android:id="#+id/toolbar_title" >
//...your code here
</RelativeLayout>
</android.support.v7.widget.Toolbar>
And then add this toolbar to the top of your UI.

Based on the example you used, it looks like they are using a CollapsingToolbarLayout with the collapsing effect turned off. The layout may look something like this:
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_width="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: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"
app:layout_scrollFlags="enterAlways">
<FrameLayout
android:id="#+id/header_frame"
android:layout_width="match_parent"
android:layout_height="#dimen/height_header"
app:layout_collapseMode="pin">
<ImageView
android:id="#+id/header_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"/>
<ImageView
android:id="#+id/square_image"
android:layout_width="#dimen/size_square_image"
android:layout_height="#dimen/size_square_image"
android:layout_gravity="center|bottom"
android:scaleType="centerCrop"/>
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay"/>
</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"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>

SetFitsSystemWindow programmatically doesn't work as expected

I'm trying to work with different AppBarLayouts in one Activity.
When a Fragment is loaded, it can call a "ToolbarManager", that handles the replacing of the currently active Toolbar (namely an AppBarLayout).
For some of these Toolbars (using CollapsingToolbarLayout) I want them to draw behind the StatusBar.
This works fine when setting the "fitsSystemWindow" to true in the XML.
But when using just a Toolbar with layout_scrollFlags="scroll", the Toolbar Title is displayed even behind the StatusBar.
To avoid this, I want to disable the "fitsSystemWindow" when loading such a Toolbar by using setFitsSystemWindow(false).
Disabling works fine, but when re-enabling by setFitsSystemWindow(true) for using with CollapsingToolbarLayout, the StatusBar is colored and the Toolbar is placed below the StatusBar with a padding in size of the StatusBar on top.
Image: Drawn below StatusBar instead of behind
When I don't use setFitsSystemWindow(true) and just set it to true in the XML layout, the display of CollapsingToolbarLayout is fine.
Is this a bug in setFitSystemWindow or is this method just different from the XML attribute?
Here are the layouts I use:
Activity:
<android.support.v4.widget.DrawerLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/drawer_layout"
android:fitsSystemWindows="true"
tools:context=".activities.MainActivity"
style="#style/AppTheme">
<android.support.design.widget.CoordinatorLayout
android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:id="#+id/coordinator_layout">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="wrap_content">
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragment_container"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</FrameLayout>
<ProgressBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:indeterminate="true"
android:indeterminateDuration="1000"
android:layout_marginBottom="-7dp"
android:id="#+id/loadingBar"
style="#style/Widget.AppCompat.ProgressBar.Horizontal"
android:layout_gravity="center_horizontal|bottom"
android:gravity="bottom"/>
</android.support.design.widget.CoordinatorLayout>
<include layout="#layout/include_navigationview" />
The AppBarLayout is replaced every time a new Fragment is loaded.
The following layout is the Toolbar which should not draw behind the StatusBar, but the Toolbar should scroll (leaving only the TabLayout visible)
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:id="#+id/toolbar_discover"
android:fitsSystemWindows="true"
android:paddingBottom="0dp">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/AppTheme.Toolbar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|snap">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tablayout_discover"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:tabMode="fixed"
app:tabGravity="fill" />
</android.support.design.widget.AppBarLayout>
This used to work when I set fitsSystemWindows=false on the CoordinatorLayout in the MainActivity Layout. When doing so, the following CollapsingToolbar cannot draw behind the StatusBar.
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:id="#+id/toolbar_account"
android:fitsSystemWindows="true"
android:paddingBottom="0dp">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
android:id="#+id/collapsingToolbarLayout">
<ImageView
android:layout_width="match_parent"
android:layout_height="250dp"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:id="#+id/banner_image"
android:src="#mipmap/img_header"/>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:id="#+id/toolbar"
android:fitsSystemWindows="false"
android:layout_height="?attr/actionBarSize"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:theme="#style/AppTheme.Toolbar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Coordinator Layout content is showing behind the status bar

I'm building a toolbar with a map fragment as part of it. The toolbar is fixed in position and is opaque.
Whenever the view's content is scrolled upwards, the map fragment moves with it but it is visible above the toolbar (and therefore between the status bar itself and the statusbar's orange background).
This is the resulting issue:
If I scroll a bit more, the scrim fades in normally, but too late.
Is there a way of not drawing the content when it goes above the toolbar? Or a way of making the status bar background to be drawn in front of the AppBarLayout content?
I've tried drawing a view in front of the AppBarLayout (right below the statusbar), but once the MapFragment is scrolled all the way up, it is then brought to front of that view, making the MapFragment visible during a small instant.
<?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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/promotion_details_image_height"
android:clickable="true"
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:background="#color/orange"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_collapseMode="none"
tools:context=".restaurants.stores.StoresFragment" />
<ImageView
android:id="#+id/minimizeBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/stores_details_minimize_margin"
android:clickable="true"
android:contentDescription="#null"
android:paddingTop="#dimen/status_bar_height"
android:src="#drawable/selector_map_minimize_btn"
android:visibility="gone" />
<include
android:id="#+id/cardDetailsLayout"
layout="#layout/store_card_small_detail"
android:layout_width="match_parent"
android:layout_height="#dimen/stores_details_card_height"
android:layout_alignParentBottom="true"
android:layout_margin="10dp"
android:visibility="gone" />
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<com.app.views.FontTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:singleLine="true"
android:text="#string/store_toolbar_text"
android:textColor="#color/white"
android:textSize="#dimen/toolbar_text_size"
app:font="#string/fontFlamaMedium" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Edit:
In the layout xml the android:layout_behavior attribute associated with my RecyclerView, but the toolbar's content has the correct behaviour, the problem is that it is visible under the statusbar, which I don't want it to.

You should remove your argument:android:fitsSystemWindows="true"
More about this on this blogPost from a google developper :
https://medium.com/google-developers/why-would-i-want-to-fitssystemwindows-4e26d9ce1eec

Remove this attribute from Toolbar
android:background="?attr/colorPrimary"
And add this attribute to CollapsingToolbar
app:contentScrim="?attr/colorPrimary"
The contentScrim will control the color of the Toolbar and ensure the color only appears when the background image has faded out

Design Library Android

I'm using Android Design Library components, and I would like to have an image behind my ToolBar and TabLayout. The image must be cropped and not fit to the size. I'm actually setting my image as android:background="#drawable/AppBarBg" in AppBarLayout which doesn't crop (of course) my image. How can I crop my background image ?
<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.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#drawable/AppBarBg"
android:scaleType="centerCrop"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
style="#style/ToolBarStyle"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:minHeight="?attr/actionBarSize"
android:orientation="horizontal"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</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" />
</android.support.design.widget.CoordinatorLayout>

AppBarLayout is basically just a LinearLayout so setting a background will strech it...
I think that you're looking for CollapsingToolbarLayout...
Your layout structure should be like this:
AppBarLayout
CollapsingToolbarLayout
ImageView (this is the background which you want to centerCrop)
ToolBar
TabLayout
etc...
check it out here: CollapsingToolbarLayout and TabLayout