FloatingActionMenu/example/layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:fab="http://schemas.android.com/apk/res-auto"
    android:id="@+id/comicView"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <terranovaproductions.newcomicreader.FloatingActionMenu
        android:id="@+id/fab_menu"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="16dp">

        <!--First button as menu button-->
        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab_main"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_add_white_24dp"
            fab:fabSize="normal"
            fab:backgroundTint="@color/material_orange"/>

        <!-- Other button as menu items-->
        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab_random"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="Hello World1"
            android:paddingBottom="20dp"
            fab:fabSize="mini"
            fab:backgroundTint="@color/material_orange" />


        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab_download"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="Hello World2"
            android:paddingBottom="20dp"
            fab:fabSize="mini"
            fab:backgroundTint="@color/material_orange"/>

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab_browser"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="Hello World3"
            android:paddingBottom="20dp"
            fab:fabSize="mini"
            fab:backgroundTint="@color/material_orange"/>

    </terranovaproductions.newcomicreader.FloatingActionMenu>


</RelativeLayout>