CollapsingToolbarLayout

collapsing_toolbar_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout android:id="@+id/main_content"
  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:layout_width="match_parent"
    android:layout_height="128dp"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      app:layout_scrollFlags="scroll|exitUntilCollapsed">

      <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:layout_collapseMode="pin"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
    </android.support.design.widget.CollapsingToolbarLayout>
  </android.support.design.widget.AppBarLayout>

  <!-- Use android:foreground to create the shadow effect -->

  <FrameLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:foreground="@drawable/shadow_foreground"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">
    
    <android.support.v4.view.ViewPager
      android:id="@+id/pager"
      android:layout_width="match_parent"
      android:layout_height="match_parent" />

  </FrameLayout>
</android.support.design.widget.CoordinatorLayout>