How to limit height of android.support.v7.widget.RecyclerView inside android.support.v4.widget.NestedScrollView

Within my current Android application I have a screen that displays a android.support.v4.app.DialogFragment.

This DialogFragment view contains the following UI components

HEADING
== Sub Heading
== NestedScrollView
==== RecyclerView
==== RadioGroup
==== Spinner
==== EditText
==== Action Buttons

The DialogFragment is configured to be Full Screen using Style as follows:-

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(DialogFragment.STYLE_NO_TITLE, R.style.AppDialogTheme);
}

My dialog style is

<!-- Define your custom dialog theme here extending from base -->
<style name="AppDialogTheme" parent="Theme.AppCompat.Light.Dialog">
    <!-- Define color properties as desired -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">#000</item>
    <item name="android:textColorHighlight">@color/background_url</item>
    <item name="colorAccent">@color/dark_grey</item>
    <item name="colorControlNormal">@color/colorPrimaryDark</item>
    <!-- Define window properties as desired -->
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowBackground">@android:color/white</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowCloseOnTouchOutside">false</item>
</style>

The reason I employ a nestedScrollView is so that the View will work in both Portrait and Landscape.

I wish to limit the height of the RecyclerView

The closest I have got is using the layout below.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/headline_literal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:gravity="center"
        android:padding="10dp"
        android:text="Heading"
        android:textSize="20sp"
        android:textStyle="bold" />

    <View
        android:id="@+id/divider"
        android:layout_width="fill_parent"
        android:layout_height="2dp"
        android:layout_marginTop="5dp"
        android:background="#c0c0c0" />

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        tools:context=".MainActivity">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:weightSum="5"
            android:orientation="vertical">

            <TextView
                android:id="@+id/sub_headline_literal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:padding="10dp"
                android:text="dfghdfgh dfghd fgh dfgh dfgh dfgh dfgh dfgh dfgh dfgh dfgh dfgh dfghd fghd fdfgh dfgh dfgh dfgh dfgh dfgb xfb dfgh dfg dfgb dfgb dfghdf dfh fgh fhsfh hs ghsdrh "
                android:textSize="16sp"
                android:textStyle="normal" />

            <android.support.v7.widget.RecyclerView
                android:id="@+id/dummy_rv"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_margin="10dp"
                android:layout_marginStart="9dp"
                android:layout_marginEnd="9dp"
                android:layout_weight="1"
                android:background="@drawable/rv_border"
                android:fadingEdge="horizontal"
                android:fadingEdgeLength="10dp"
                android:padding="10dp"
                android:requiresFadingEdge="vertical" />

            <RadioGroup
                android:id="@+id/myRadioGroup"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginTop="10dp"
                android:checkedButton="@+id/sound">

                <RadioButton
                    android:id="@+id/sound"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Sound" />

                <RadioButton
                    android:id="@+id/vibration"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Vibration" />

                <RadioButton
                    android:id="@+id/silent"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Silent" />

            </RadioGroup>

            <EditText
                android:id="@+id/notes"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Notes" />

            <LinearLayout
                android:id="@+id/buttons"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:padding="10dp">

                <TextView
                    android:id="@+id/cancel_button"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:text="Cancel" />

                <TextView
                    android:id="@+id/submit_button"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:text="Submit" />

            </LinearLayout>

        </LinearLayout>

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

</LinearLayout>

By using weightSum on the inner LinearLayout of the NestedScrollView I can limit the height of the Recyclerview however the NestedScrollView Height is far to large, with more than half its height being blank.

How can I limit the height of my RecyclerView and get NestedScrollView to Wrap Content?

I've tried NestedScrollView with height wrap_content but this has no effect.

How can I achieve the desired UI?

from How to limit height of android.support.v7.widget.RecyclerView inside android.support.v4.widget.NestedScrollView