<android.support.design.widget.CoordinatorLayout
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.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/ThemeOverlay.AppCompat.Light">

    <include layout="@layout/toolbar"/>

    <android.support.design.widget.TabLayout
        android:id="@+id/tablayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabGravity="fill"
        app:tabTextColor="@android:color/white"
        app:tabSelectedTextColor="@android:color/white"
        app:tabBackground="@drawable/tab_color_background"
        app:tabIndicatorColor="#ffffff"
        app:tabIndicatorHeight="4dp"
        app:tabMode="fixed" />

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

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:gravity="center"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fabvptl"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|left"
    android:clickable="true"
    app:elevation="10dp"
    android:layout_margin="10dp"
    app:backgroundTint="#D30A27"
    android:src="@drawable/fabrandom"
/>

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

<android.support.v4.widget.NestedScrollView
    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">

    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="1"
            android:id="@+id/squaremask"
            android:background="#D52115"
            android:textColor="#FFFFFF"
            android:textStyle="bold"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:textSize="80sp"
            android:padding="50dp"/>

    </RelativeLayout>
</android.support.v4.widget.NestedScrollView>

android:gravity="center"

android:layout_gravity="center"

android:orientation="vertical"