Avoid Overlap RecyclerVIew

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    android:id="@+id/relative"
    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:layout_width="match_parent"
    android:layout_height="wrap_content"
    tools:context=".MainActivity"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:fitsSystemWindows="true">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical"
        android:clipToPadding="false"
        android:layout_marginBottom="50dp"/>

    <com.startapp.android.publish.ads.banner.Banner
        android:id="@+id/startAppBanner"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        adTag="bottom_banner"/>
</RelativeLayout>