habitica-android/Habitica/res/layout/activity_gem_purchase.xml

<FrameLayout 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"
             tools:context=".ui.activities.MainActivity"
             android:id="@+id/overlayFrameLayout">
    <androidx.drawerlayout.widget.DrawerLayout
            android:id="@+id/drawer_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
                        android:gravity="center">

        <androidx.coordinatorlayout.widget.CoordinatorLayout
                android:id="@+id/main_content"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:elevation="0dp"
                tools:context=".ui.activities.MainActivity">

            <androidx.viewpager.widget.ViewPager
                    android:id="@+id/viewPager"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@android:color/white"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

            <com.google.android.material.appbar.AppBarLayout
                    android:id="@+id/appbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:fitsSystemWindows="false">

                <com.google.android.material.appbar.CollapsingToolbarLayout
                        android:id="@+id/collapsing_toolbar"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:fitsSystemWindows="false"
                        app:titleEnabled="false"
                        app:contentScrim="?attr/colorPrimary"
                        app:expandedTitleMarginEnd="?attr/actionBarSize"
                        app:expandedTitleMarginStart="0dp"
                        app:layout_scrollFlags="scroll|exitUntilCollapsed">

                    <ImageView
                            android:id="@+id/headerImage"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:layout_marginTop="?attr/actionBarSize"
                            app:layout_collapseMode="parallax"
                            android:src="@drawable/support_habitica"
                            android:paddingBottom="21dp"
                            android:contentDescription="@string/support_habitica"/>

                    <androidx.appcompat.widget.Toolbar
                            android:id="@+id/toolbar"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:minHeight="?attr/actionBarSize"
                            android:theme="@style/Toolbar"
                            app:layout_collapseMode="pin"
                            app:popupTheme="@style/Theme.AppCompat.Light" />
                </com.google.android.material.appbar.CollapsingToolbarLayout>

                <com.google.android.material.tabs.TabLayout
                        android:id="@+id/tab_layout"
                        android:layout_width="match_parent"
                        android:layout_height="54dp"
                        android:layout_gravity="bottom"
                        android:background="?colorPrimaryOffset"
                        android:elevation="0dp"
                        android:fillViewport="false"

                        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                        app:layout_anchor="@+id/collapsing_toolbar"
                        app:layout_anchorGravity="bottom"

                        app:layout_collapseMode="pin"
                        app:tabGravity="fill"
                        app:tabIndicatorColor="@android:color/white"
                        app:tabMode="fixed" />
            </com.google.android.material.appbar.AppBarLayout>

        </androidx.coordinatorlayout.widget.CoordinatorLayout>
    </androidx.drawerlayout.widget.DrawerLayout>
</FrameLayout>