<?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.support.design.widget.AppBarLayout
        android:id="@+id/appBarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        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="wrap_content"
            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
            <!-- HEADER -->
            <RelativeLayout
                android:id="@+id/rel1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_collapseMode="parallax"
                android:background="@color/lightGreen"
                android:layout_marginTop="?attr/actionBarSize"
                android:paddingTop="10dp"
                android:paddingBottom="10dp">
                <TextView
                    android:id="@+id/title1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerHorizontal="true"
                    android:text="Resist the urge"
                    android:textSize="35sp"
                    android:includeFontPadding="true"
                    android:layout_centerInParent="true"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/resistUrgeTitleTextView"
                    android:layout_centerHorizontal="true"
                    android:text="Use a method below to help."
                    android:includeFontPadding="true"/>
            </RelativeLayout>

            <FrameLayout
                android:id="@+id/main.framelayout.title"
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:layout_gravity="bottom|center_horizontal"
                android:background="@color/lightOrange"
                android:orientation="vertical"
                app:layout_collapseMode="parallax"
                >

                <LinearLayout
                    android:id="@+id/main.linearlayout.title"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:orientation="vertical"
                    >

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:gravity="bottom|center"
                        android:text="Title 1"
                        android:textColor="@android:color/white"
                        android:textSize="30sp"
                        app:layout_behavior="com.uhg.ent.mobile.quit4life.UrgeIntervention.TitleTextViewBehavior"
                        />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="4dp"
                        android:text="Subtitle"
                        android:textColor="@android:color/white"
                        />

                </LinearLayout>
            </FrameLayout>

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:backgroundTint="@color/lightGreen"
                app:layout_collapseMode="pin"
                app:title=""/>
            <!--<TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical|center_horizontal"
                android:text="Resist the urge"
                android:textColor="@android:color/black"
                android:textSize="30sp"
                app:layout_behavior="com.uhg.ent.mobile.quit4life.UrgeIntervention.TitleTextViewBehavior"
                />-->


        </android.support.design.widget.CollapsingToolbarLayout>
        <android.support.constraint.ConstraintLayout
            android:id="@+id/cardConstraintLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            android:background="@android:color/holo_red_dark"
            android:layout_marginTop="0dp">

            <android.support.v4.view.ViewPager
                android:id="@+id/pager"
                android:layout_width="0dp"
                android:layout_height="175dp"
                android:layout_alignParentStart="true"
                android:layout_alignParentTop="true"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0"
                android:paddingBottom="50dp"/>
            <android.support.design.widget.TabLayout
                android:layout_width="wrap_content"
                android:layout_height="20dp"
                android:id="@+id/viewPagerIndicator"
                app:tabBackground="@drawable/pager_indicator_selector_gray"
                app:tabGravity="center"
                app:tabIndicatorHeight="0dp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintTop_toBottomOf="@id/interventionCategoryViewPager"
                android:layout_marginBottom="10dp"/>
        </android.support.constraint.ConstraintLayout>
        <!-- </android.support.design.widget.CollapsingToolbarLayout>-->
        <!--<android.support.v7.widget.Toolbar
            android:id="@+id/main.toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/colorPrimary"
            app:layout_anchor="@id/main.framelayout.title"
            app:theme="@style/ThemeOverlay.AppCompat.Dark"
            app:title=""
            app:layout_collapseMode="pin">
        </android.support.v7.widget.Toolbar>-->
    </android.support.design.widget.AppBarLayout>
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">
    </android.support.v7.widget.RecyclerView>
  </android.support.design.widget.CoordinatorLayout>

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:background="?attr/colorPrimary"
        android:backgroundTint="@color/lightOrange"
        app:title=""
        android:layout_marginTop="20dp"/>
    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/toolbar">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:gravity="bottom|center"
            android:text="Test 1"
            android:textColor="@android:color/white"
            android:textSize="30sp"
            app:layout_behavior="com.uhg.ent.mobile.quit4life.UrgeIntervention.TitleTextViewBehavior"
            android:elevation="100dp"/>
        <android.support.design.widget.AppBarLayout
            android:id="@+id/appBarLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            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="wrap_content"
                app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
                <LinearLayout
                    android:id="@+id/main.framelayout.title"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="bottom|center_horizontal"
                    android:background="@color/lightGreen"
                    android:orientation="vertical"
                    app:layout_collapseMode="parallax"
                    android:paddingTop="50dp">
                    <!--<TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:gravity="bottom|center"
                        android:text="Resist The Urge"
                        android:textColor="@android:color/white"
                        android:textSize="30sp"
                        app:layout_behavior="com.uhg.ent.mobile.quit4life.UrgeIntervention.TitleTextViewBehavior"
                        android:paddingTop="20dp"/>-->
                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="4dp"
                        android:text="Test 2."
                        android:textColor="@android:color/white"
                        android:paddingBottom="20dp"
                        />
                </LinearLayout>
            </android.support.design.widget.CollapsingToolbarLayout>
            <android.support.constraint.ConstraintLayout
                android:id="@+id/cardConstraintLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"

                android:layout_marginTop="0dp">

                <android.support.v4.view.ViewPager
                    android:id="@+id/viewPager"
                    android:layout_width="0dp"
                    android:layout_height="175dp"
                    android:layout_alignParentStart="true"
                    android:layout_alignParentTop="true"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintVertical_bias="0"
                    android:paddingBottom="50dp"/>
                <android.support.design.widget.TabLayout
                    android:layout_width="wrap_content"
                    android:layout_height="20dp"
                    android:id="@+id/viewPagerIndicator"
                    app:tabBackground="@drawable/pager_indicator_selector_gray"
                    app:tabGravity="center"
                    app:tabIndicatorHeight="0dp"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/interventionCategoryViewPager"
                    android:layout_marginBottom="10dp"/>
            </android.support.constraint.ConstraintLayout>
        </android.support.design.widget.AppBarLayout>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/white"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">
        </android.support.v7.widget.RecyclerView>
    </android.support.design.widget.CoordinatorLayout>
</RelativeLayout>

<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" /> // to  pin in place until it reaches the bottom of the layout

private void setTitleOfLayout() {
        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
        appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            boolean isShow;
            int scrollRange = -1;

            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
                if (scrollRange == -1) {
                    scrollRange = appBarLayout.getTotalScrollRange();
                }
                if (scrollRange + verticalOffset == 0) {

                  // orange part is not visible so set The title

                    if (myTitleName != null)
                        toolbar.setTitle(myTitleName);

                    isShow = true;
                } else if (isShow) {
                     // orange part is visible so remove the title with

                      space here make sure your are not setting null in toolbar.

                    toolbar.setTitle(" ");

                    isShow = false;
                }
            }
        });

    }

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="your text here"/>

    </android.support.v7.widget.Toolbar>

</android.support.design.widget.AppBarLayout>