Button XML

activity_main.xml

<RelativeLayout 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=".GroceriesMainActivity">

    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/total_layout"
        android:layout_below="@+id/toolbar"
        android:scrollbars="vertical" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/act_expand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_gravity="bottom|end"
        android:layout_marginBottom="@dimen/fab_margin"
        android:layout_marginEnd="@dimen/fab_margin"
        android:layout_marginRight="@dimen/fab_margin"
        android:src="@drawable/ic_action"
        app:fabSize="normal" />

    <include
        android:id="@+id/buttons"
        layout="@layout/buttons" />

    <RelativeLayout
        android:id="@+id/total_layout"
        android:layout_width="wrap_content"
        android:layout_height="@dimen/text_height"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_gravity="bottom|start"
        android:background="@color/primary">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginEnd="@dimen/text_small_margin"
            android:layout_marginRight="@dimen/text_small_margin"
            android:gravity="center"
            android:text="@string/text_total"
            android:textSize="@dimen/dialog_text" />

        <TextView
            android:id="@+id/text_total"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_marginEnd="@dimen/text_long_margin"
            android:layout_marginRight="@dimen/text_long_margin"
            android:gravity="center_vertical|end"
            android:text=""
            android:textSize="@dimen/dialog_text" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginEnd="@dimen/text_small_margin"
            android:layout_marginLeft="@dimen/space_margin"
            android:layout_marginRight="@dimen/text_small_margin"
            android:layout_marginStart="@dimen/space_margin"
            android:gravity="left|center_vertical"
            android:text="@string/text_item"
            android:textSize="@dimen/dialog_text" />

        <TextView
            android:id="@+id/text_item"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_marginLeft="@dimen/text_long_margin"
            android:layout_marginStart="@dimen/text_long_margin"
            android:gravity="center_vertical|start"
            android:text=""
            android:textSize="@dimen/dialog_text" />

    </RelativeLayout>
</RelativeLayout>

buttons.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">

    <RelativeLayout
        android:id="@+id/expanded_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/transparent"
        android:orientation="horizontal"
        android:visibility="invisible">

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/act_collapse"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_gravity="end|bottom"
            android:layout_marginBottom="@dimen/fab_margin"
            android:layout_marginEnd="@dimen/fab_margin"
            android:layout_marginRight="@dimen/fab_margin"
            android:src="@drawable/ic_action"
            app:fabSize="normal" />

    </RelativeLayout>
</LinearLayout>