chinwag-android/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.keylesspalace.tusky.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:theme="@style/AppTheme.Account.AppBarLayout"
            app:popupTheme="@style/AppTheme.Account.ToolbarPopupTheme.Dark"
            android:elevation="4dp"
            android:background="?attr/toolbar_background_color" />

        <android.support.v4.view.ViewPager
            android:id="@+id/pager"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <android.support.design.widget.TabLayout
                android:id="@+id/tab_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:tabTextAppearance="@style/TabLayoutTextStyle"
                app:tabBackground="?android:colorBackground"
                app:tabPaddingStart="1dp"
                app:tabPaddingEnd="1dp">

                <android.support.design.widget.TabItem
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/title_home" />

                <android.support.design.widget.TabItem
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/title_notifications" />

                <android.support.design.widget.TabItem
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/title_public" />

            </android.support.design.widget.TabLayout>

        </android.support.v4.view.ViewPager>
    </LinearLayout>

    <FrameLayout
        android:id="@+id/overlay_fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </FrameLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floating_btn"
        android:layout_width="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="16dp"
        android:layout_height="wrap_content"
        app:srcCompat="@drawable/ic_create_24dp"/>
</android.support.design.widget.CoordinatorLayout>