donext/DoNExt/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:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context=".activities.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/appbar_padding_top"
        android:theme="@style/AppTheme.AppBarOverlay">
        <include layout="@layout/toolbar" android:id="@+id/toolbar" />

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <ImageView
                android:id="@+id/left_arrow"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:contentDescription="@string/tab_left_arrow"
                android:src="@drawable/ic_keyboard_arrow_left_white_24dp" />
            <ImageView
                android:id="@+id/right_arrow"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:contentDescription="@string/tab_right_arrow"
                android:src="@drawable/ic_keyboard_arrow_right_white_24dp" />
            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_toEndOf="@+id/left_arrow"
                android:layout_toStartOf="@+id/right_arrow"
                app:tabMode="scrollable" />
        </RelativeLayout>
    </android.support.design.widget.AppBarLayout>

    <com.wismna.geoffroy.donext.widgets.NonSwipeableViewPager
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/fab_margin"
        android:onClick="onNewTaskClick"
        android:src="@drawable/ic_add" />

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