Develop Reference

Toolbar shadow not showing

My app has a fragment with tablayout and it shows a shadow with elevation:
<android.support.design.widget.TabLayout
android:id="#+id/my_music_tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/tab_bg"
android:elevation="4dp"
app:tabSelectedTextColor="?attr/color_tab_text_selected"
app:tabTextColor="?attr/color_tab_text"
app:tabIndicatorColor="?attr/color_tab_text_selected"
app:tabIndicatorHeight="4dp" />
But when I switch to another fragment that doesn't have a TabLayout, the shadow doesn't appear:
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay"
app:expanded="true" >
<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:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false" >
<include
layout="#layout/imageview_appbar"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
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"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
What am I doing wrong?

I got it to work by adding the following codes to my MainActivity class:
AppBarLayout layout = (AppBarLayout) findViewById(R.id.appbar);
layout.setStateListAnimator(null);
ViewCompat.setElevation(layout, 8);

Appbarlayout doesn't display shadow if it contains a scrollable collapsing toolbar, it is hardcoded to act so, probably because of performance concerns.
Try workarounds such as adding a plain view to bottom of appbar and setting its background to a shadow drawable ( manually coded gray gradient )

Collapsing toolbar title gravity does not set to bottom

i am using collapsing toolbar with toolbar only here my purpose
is to use default parallex feature for toolbar,but the problem i am facing that back arrow and title in expanded form overlapping each other i tried to set expandedtitlegravity to bottom didn't work either
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="140dp"
android:background="#color/white"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:fitsSystemWindows="true"
app:collapsedTitleTextAppearance="#style/SavedCollapsedAppBar"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="20dp"
app:expandedTitleMarginStart="20dp"
app:expandedTitleTextAppearance="#style/SavedExpandedAppBar"
app:layout_scrollFlags="scroll|exitUntilCollapsed|enterAlways">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/white"
android:fontFamily="sans-serif-medium"
android:theme="#style/SavedToolbarColoredBackArrow"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme"
app:titleTextAppearance="#style/SavedCollapsedAppBar"
app:titleTextColor="#color/black" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

It's seems like, the problem is with the Toolbar.
set app:contentInsetStart in Toolbar i.e.
<android.support.v7.widget.Toolbar
...
app:contentInsetStart="72dp"
It may solve the problem.

How to reduce left and bottom space from toolbar title in collapsing action bar android?

I need to reduce left and bottom space from toolbar title in collapsing action bar. I need to do something like whats app. Here is my code.
Thanks for help.
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
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="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/img_profile"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/speaker1"
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"
app:layout_scrollFlags="scroll|enterAlways"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

add this below in your activity where you are setting the title
mBinding.collapseToolbar.setExpandedTitleMarginBottom((int) getResources().getDimension(R.dimen.contact_info_expanded_title_margin));
mBinding.collapseToolbar.setExpandedTitleMarginStart((int) getResources().getDimension(R.dimen.contact_info_expanded_title_margin));
mBinding.collapseToolbar.setTitle("Toolbar title");

Scroll away picture and appbar title but leave tabs in Android

I use app support and CoordinatorLayout. I was able to implement CollapsingToolbarLayout with ImageView and Toolbar that hide when scrolling. I am struggled with tabs - TabLayout is not collapsed, which is good. The problem is that it does not look nice - I want it to use bottom part of the picture as background.
I moved TabLayout within CollapsingToolbarLayout and then it uses the picture as background but there are two problems - tabs are located at top of the screen and they are hidden when scrolling.
I want to achieve the effect that it will sit at bottom of picture
and it will stay at top of the screen when other parts are scrolled away
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="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true"
>
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|enterAlways|snap"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="4dp"
app:expandedTitleMarginEnd="64dp"
>
<ImageView
android:id="#+id/main.backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:src="#drawable/digit1_hill"
app:layout_collapseMode="parallax"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/main.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.TabLayout
android:id="#+id/main.tabs"
android:layout_width="fill_parent"
android:layout_height="?attr/actionBarSize"
app:tabSelectedTextColor="?android:attr/textColorPrimaryInverse"
app:tabIndicatorColor="?android:attr/textColorPrimaryInverse"
app:tabIndicatorHeight="4dp"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/dashboard.viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>

You need to tell your Toolbar to app:layout_scrollFlags="scroll|enterAlways" and your CollapsingToolbarLayout to app:layout_scrollFlags="scroll|exitUntilCollapsed" while your TabLayout should have android:layout_gravity="bottom"
Try this:
<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:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<!-- Fit the system windows for your CollapsingToolbarLayout
also set your height to wrap_content and give image a height-->
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/main.collapsing"
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="4dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="#+id/main.backdrop"
android:layout_width="match_parent"
android:layout_height="244dp"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:src="#drawable/digit1_hill"
app:layout_collapseMode="parallax"/>
<!-- Tell your toolbar to scroll|enterAlways -->
<android.support.v7.widget.Toolbar
android:id="#+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|enterAlways"/>
<!-- add layout_gravity="bottom" -->
<android.support.design.widget.TabLayout
android:id="#+id/main.tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:tabSelectedTextColor="?android:attr/textColorPrimaryInverse"
app:tabIndicatorColor="?android:attr/textColorPrimaryInverse"
app:tabIndicatorHeight="4dp"
android:layout_gravity="bottom"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/dashboard.viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
Update
Additionally, you should switch your theme or add a new theme:
<style name="NewAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Include all items from original theming -->
</style>
and to hide the title create a style:
<style name="Invisible" parent="AppTheme">
<item name="android:textColor">#android:color/transparent</item>
</style>
and then set this as your collapsedTitleTextAppearance:
app:collapsedTitleTextAppearance="#style/Invisible"

How can put a text at the center in CollapsingToolbarLayout and Toolbar?

I have a title on the left side in a Toolbar and in a CollapsingToolbarLayout. I want to move it to the center horizontally.
Please help me.
Pictures of my current layout and what I want to achieve:
Code:
<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/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.sagar.materialdesigndemo.CollapsingToolbarFragment">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar_layout"
android:layout_width="match_parent"
android:layout_height="256dp"
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"
android:elevation="#dimen/toolbar_elevation"
app:expandedTitleTextAppearance="#style/HeaderTitleStyle"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/flexible_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/backmain"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:titleTextAppearance="#style/ToolbarTitleStyle"
android:layoutDirection="rtl"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Set this parameter in your CollapsingToolbarLayout
app:expandedTitleGravity="center_horizontal"

To achieve this, you can get reference to the collapsing toolbar from the corresponding Java class and set the gravity of your title:
CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
//now that you have access to your toolbar, set the directions.
collapsingToolbar.setExpandedTitleGravity(Gravity.CENTER_HORIZONTAL);
collapsingToolbar.setCollapsedTitleGravity(Gravity.CENTER_HORIZONTAL);