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.coordinatorlayout.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:elevation="0dp"
            tools:context=".ui.activities.MainActivity">

            <FrameLayout
                android:id="@+id/fragment_container"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="?attr/colorContentBackground"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

            <com.google.android.material.appbar.AppBarLayout
                android:id="@+id/appbar"
                    android:background="?attr/headerBackgroundColor"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <androidx.appcompat.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:minHeight="?attr/actionBarSize"
                    android:background="?attr/colorContentBackground"
                    android:theme="@style/Toolbar.Modern"
                    style="@style/ToolbarTitleStyle"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/PopupTheme" />
            </com.google.android.material.appbar.AppBarLayout>

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