xml files

activity_article.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    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"
    tools:context=".ArticleActivity"
    android:orientation="vertical">


    <ImageView
        android:id="@+id/backButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_gravity="left"
        android:src = "@drawable/back"
        android:gravity="left"/>

    <ImageView
        android:id="@+id/menuButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:clickable="true"
        android:src="@drawable/pocke_ball"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true" />

    <ImageView
        android:id="@+id/nextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:clickable="true"
        android:src = "@drawable/forward"
        android:text="next" />

    <android.support.v4.view.ViewPager
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clickable="true"
        android:layout_above="@id/menuButton"
        android:id="@+id/viewPager"/>


</RelativeLayout>

article_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ArticleFragment">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:requiresFadingEdge="vertical"
        android:id="@+id/articleRecView" />

</FrameLayout>