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

<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.habitrpg.android.habitica.ui.activities.MainActivity">

    <!-- As the main content view, the view below consumes the entire
         space available using match_parent in both dimensions. -->
    <FrameLayout android:layout_width="match_parent"
                 android:layout_height="match_parent">
        <android.support.design.widget.CoordinatorLayout
            android:id="@+id/coordinatorLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context=".ui.activities.MainActivity"
            android:fitsSystemWindows="false">

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

            <android.support.design.widget.AppBarLayout
                android:id="@+id/appbar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

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

                    <include
                        android:id="@+id/avatar_with_bars"
                        layout="@layout/avatar_with_bars"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="?attr/actionBarSize"
                        app:layout_collapseMode="parallax" />

                    <android.support.v7.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">
                        <RelativeLayout
                            android:layout_width="wrap_content"
                            android:layout_height="match_parent"
                            android:layout_marginRight="16dp">

                            <TextView
                                android:id="@+id/toolbar_title"
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content"
                                android:layout_centerVertical="true"
                                android:ellipsize="end"
                                android:maxLines="1"
                                android:singleLine="true"
                                style="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
                                tools:text="Habitica"/>

                            <FrameLayout
                                android:id="@+id/toolbar_accessory_container"
                                android:layout_width="wrap_content"
                                android:layout_height="match_parent"
                                android:scaleType="centerCrop"
                                android:adjustViewBounds="true"
                                android:layout_centerVertical="true"
                                android:layout_alignParentRight="true"/>

                        </RelativeLayout>
                    </android.support.v7.widget.Toolbar>
                </android.support.design.widget.CollapsingToolbarLayout>

                <android.support.design.widget.TabLayout
                    android:id="@+id/detail_tabs"
                    android:layout_width="match_parent"
                    android:layout_height="54dp"
                    android:layout_gravity="bottom"
                    android:background="@color/brand_200"
                    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" />
            </android.support.design.widget.AppBarLayout>

            <LinearLayout
                android:id="@+id/bottom_wrapper"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:layout_gravity="bottom|center_horizontal"
                android:layout_alignParentBottom="true"
                app:layout_behavior="com.habitrpg.android.habitica.ui.helpers.FloatingActionMenuBehavior"
                android:padding="0dp">
                <android.support.design.widget.CoordinatorLayout
                    android:id="@+id/floating_menu_wrapper"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="bottom|right"
                    android:layout_marginBottom="-5dp"
                    />
                <com.roughike.bottombar.BottomBar
                    android:id="@+id/bottom_navigation"
                    android:layout_width="match_parent"
                    android:layout_height="60dp"
                    android:background="@color/brand_100"
                    app:bb_tabXmlResource="@xml/main_menu_tasks"
                    app:bb_inActiveTabColor="@color/brand_500"
                    app:bb_activeTabColor="@color/white"
                    app:bb_behavior="underNavbar"
                    app:bb_badgesHideWhenActive="true"
                    app:bb_badgeBackgroundColor="@color/brand_400"
                    android:layout_gravity="bottom"
                    android:layout_margin="0dp"
                    />

            </LinearLayout>
        </android.support.design.widget.CoordinatorLayout>
        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/overlayFrameLayout"
            android:clickable="false"
            android:fitsSystemWindows="true"
            />
    </FrameLayout>

    <!-- The drawer is given a fixed width in dp and extends the full height of
         the container. -->
    <fragment
        android:id="@+id/navigation_drawer"
        android:name="com.habitrpg.android.habitica.ui.fragments.NavigationDrawerFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:layout_marginRight="32dp"
        tools:layout="@layout/drawer_main"/>

</android.support.v4.widget.DrawerLayout>