Develop Reference

How to make toolbar edge transparent?

I have a toolbar sitting on top of a tab layout. Both of these will utilize the same color gradient as a background. I'm trying to get rid of the edge on the toolbar or tab layout so that they blend together, because right now there's a black line in between both of them. Is there any way to make this line between them transparent? I've done it before on Xcode before.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start"
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"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/menu_gradient"
android:id="#+id/content">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#drawable/transparent"
android:id="#+id/main_toolbar"
android:elevation="4dp"
app:titleTextColor="#ffffff"
tools:ignore="MissingConstraints"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#mipmap/logos_round" />
</android.support.v7.widget.Toolbar>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:background="#drawable/menu_gradient"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="#+id/tabs"
android:elevation="5dp"
android:background="#drawable/transparent"
app:tabTextColor="#color/colorPrimary"
app:tabTextAppearance="#style/customTabText"
app:tabMode="fixed">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</android.support.v4.view.ViewPager>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="#menu/activity_main_drawer"
android:background="#color/colorPrimary"/>
</android.support.v4.widget.DrawerLayout>

Include the ToolBar inside the AppBarLayout, above TabLayout as below:
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:background="#drawable/menu_gradient"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#drawable/transparent"
android:id="#+id/main_toolbar"
android:elevation="4dp"
app:titleTextColor="#ffffff"
tools:ignore="MissingConstraints"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#mipmap/logos_round" />
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="#+id/tabs"
android:elevation="5dp"
android:background="#drawable/transparent"
app:tabTextColor="#color/colorPrimary"
app:tabTextAppearance="#style/customTabText"
app:tabMode="fixed">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>

How to put a spinner between a list view and a App Bar

I am currently working on an application to help manage bills. I have an activity that list the bills. I am trying to put a spinner between a list of bills and the title at the top. Is there a way to put the spinner so that it is at the top of the listView but below the app bar.?
This is what the app looks like:
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
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:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<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.AppBarLayout>
<TextView
android:id="#+id/dateRangeView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/date_range"
android:textColor="#android:color/background_light"
android:textSize="24sp"
android:textStyle="bold"
tools:textAlignment="center"
tools:textColor="#android:color/white" />
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/progressBarBillList"
android:progressDrawable="#drawable/circular_progress_bar"
android:layout_gravity="center" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_anchor="#+id/app_bar"
android:id="#+id/bill_dates"
app:layout_anchorGravity="bottom|center">
<Spinner
android:id="#+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_marginHorizontal="16dp"
android:background="#android:color/background_light"
android:entries="#array/date_arrays"
android:prompt="#string/bill_date_prompt"
android:spinnerMode="dialog"
app:layout_anchor="#+id/listBillView"
app:layout_anchorGravity="top|right" />
</LinearLayout>
<include layout="#layout/content_bill_list" app:layout_anchor="#+id/bill_dates" />
</android.support.design.widget.CoordinatorLayout>
content_bill_list.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.yourdirectlink.ydlcms.BillListActivity"
tools:showIn="#layout/activity_bill_list">
<ListView
android:id="#+id/listBillView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" >
</ListView>
</android.support.v4.widget.NestedScrollView>

DISMISS THIS
As suggested in the comments why not use a LinearLayout with vertical orientation and put the spinner as the first child with height wrap_content and then below it the listview with height 0dp and layout_weight set to 1
NEW PROPOSAL
Take a look a this layout. I already tried at a test app:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.design.widget.AppBarLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#id/toolbar">
<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.AppBarLayout>
<LinearLayout
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/dateRangeView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/date_range"
android:textColor="#android:color/background_light"
android:textSize="24sp"
android:textStyle="bold"
tools:textAlignment="center"
tools:textColor="#android:color/white" />
<Spinner
android:id="#+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_marginHorizontal="16dp"
android:background="#android:color/background_light"
android:entries="#array/date_arrays"
android:prompt="#string/bill_date_prompt"
android:spinnerMode="dialog"
app:layout_anchor="#+id/listBillView"
app:layout_anchorGravity="top|right" />
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/progressBarBillList"
android:layout_gravity="center" />
<include
layout="#layout/content_bill_list"
app:layout_anchor="#+id/bill_dates"/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
I have to comment the popup theme because I don't have it.
Also you need to use a theme with .NoActionBar because you're suppling the action bar and on the Activity containing this layout you need to call:
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Was it what you're looking for?

AppBarLayout with tabs and ViewPager

I have a problem with TabLayoutand AppBarLayout, because I want my tabs to be at the bottom and right now they are at the top, they hide with the image as I scroll up. And there's the second problem - AppBarLayout with image doesn't hide as I scroll the text, it only hides/shows as I try to scroll image at the 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/main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows = "true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/main_appbar"
android:layout_width="match_parent"
android:layout_height="250dp"
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|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
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="#raw/test"
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:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin"/>
<android.support.design.widget.TabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</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.v4.view.ViewPager>
</android.support.design.widget.CoordinatorLayout>
Edit:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragment_pager_scrollview">
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:lineSpacingMultiplier="1.2"
android:text="#string/lorem_ip"/>
</ScrollView>

Scroll view doesn't support Appbar behaviors, change it to NestedScrollView and use the following layout:
<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/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout

Try to add gravity to your TabLayout like this:
<android.support.design.widget.TabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
/>
Edit:
In order to have the TabLayout below CollapsingToolbarLayout, simply put it into your ViewPager, like this:
<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.TabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
</android.support.v4.view.ViewPager>

Please change your code to this:
<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.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:paddingTop="#dimen/app_bar_padding"
android:background="#drawable/dash_bar"
android:layout_height="192dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="10dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/expandedImage"
android:layout_width="match_parent"
android:layout_height="200dp"
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:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="parallax">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
app:tabIndicatorColor="#ffffff"
app:tabTextColor="#b3ffffff"
android:background="#00000000"
app:tabSelectedTextColor="#ffffff"
app:tabIndicatorHeight="5dp"
app:tabMode="fixed" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Now to hide the image while scrolling the text, add this line to the View thats scrolling (i am assuming you just used textView and scrollbars there):
app:layout_behavior="#string/appbar_scrolling_view_behavior"

android - collapsing toolbar and fragment layout not working together

In my app I have two fragments and a MainActivity. The activity_main.xml contains a collapsing toolbar which works perfectly for me when the fragments are empty. In my first fragment I fetch json data from a server and put it into a listview inside the fragment activity. The data is fetched and shown correctly, but the listview takes the whole screen and my collapsing toolbar seems to be a little buggy, like sometimes it pops up and disappears and my listview is not scrollable anymore. The two activities aren’t working together at all. Is there a way to make them work together?
My activity_main.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">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="150dp"
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:expandedTitleGravity="center|bottom"
app:expandedTitleMarginBottom="56dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<ImageView
android:id="#+id/backg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/backthree"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:layout_marginBottom="48dp"
android:gravity="right"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/navigation"
android:animateLayoutChanges="true">
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:text="TextView" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:textColor="#android:color/white"
android:text="TextView" />
</FrameLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="#android:color/white"
app:itemIconTint="#android:color/darker_gray"
app:itemTextColor="#android:color/darker_gray"
app:menu="#menu/navigation" >
</android.support.design.widget.BottomNavigationView>
</android.support.design.widget.CoordinatorLayout>
My fragment_first.xml:
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorGrayHell"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp">
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="#+id/list"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="10dp"
android:layout_width="fill_parent"
android:background="#android:color/white"
android:dividerHeight="10dp"
android:divider="#color/colorGrayHell"
android:layout_height="wrap_content" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
</RelativeLayout>

You haven't mentioned where the fragments are attached - I assume within the NestedScrollView? If not, that's where they should go.
The problem is most likely the ListView within the fragment - unlike a RecyclerView, it does not implement NestedScrollingChild2 and ScrollingView, which are required for the collapsing toolbar functionality.
Replace the ListView with a RecyclerView and make sure the fragments are within the NestedScrollView that has app:layout_behavior="#string/appbar_scrolling_view_behavior" and it should work.

<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"
android:background="#android:color/background_light"
android:fitsSystemWindows="true">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fcfcfc"
android:gravity="center"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Yogesh" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/main.backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/bg1"
app:layout_collapseMode="parallax" />
<androidx.appcompat.widget.Toolbar
android:id="#+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:visibility="gone"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:title="Test"
/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Use this code.
And also you need to change color of tollbar which swutching fragment.
toolbar.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.transparent));
mFragmentToSet = new HomeDashboardFragment();

How to create a collapsing toolbar with a ViewPager inside?

I have a ScrollView with a ViewPager (for the images) and a LinearLayout for the dot indicators. I also want a collapsible toolbar with the ViewPager and the LinearLayout inside it. I have added the my code as well as a code for the collapsible toolbar. But I don't know how to implement the ViewPager and the LinearLayout inside that. Please somebody give me the correct working code?
my code
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/aboutslscrollview"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="250dp" />
<LinearLayout
android:id="#+id/SliderDots"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/viewPager"
android:layout_marginBottom="20dp"
android:gravity="center_horizontal"
android:orientation="horizontal" />
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#FFFFFF">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="About"
android:textColor="#color/colorPrimary"
android:paddingHorizontal="10dp"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>
</ScrollView>
code found for the collapsible toolbar
<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.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<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"
app:contentScrim="?attr/colorPrimary">
<ImageView
android:id="#+id/expandedImage"
android:layout_width="match_parent"
android:layout_height="200dp"
android:src="#drawable/beach_scene"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.7"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" >
</android.support.v7.widget.Toolbar>
</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:background="#android:color/white"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/sample_string"/>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
Can you please tell me where to add the ViewPager and dotindicator(LinearLayout) inside the collapsible toolbar?

The container layout-RelativeLayout of the ViewPager and LinearLayout should be inside CollapsingToolbarLayout. And set the property like this to make it collapsible with scroll events.
app:layout_collapseMode="parallax"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.birjuvachhani.myapplication.ScrollingActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
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:titleEnabled="false"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="250dp" />
<LinearLayout
android:id="#+id/SliderDots"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/viewPager"
android:layout_marginBottom="20dp"
android:gravity="center_horizontal"
android:orientation="horizontal" />
</RelativeLayout>
<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.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" >
<!-- Main content goes here. -->
</android.support.v4.widget.NestedScrollView>