How to set a linear layout of buttons at the top of an image (layouts in android)?

I would like the radio button options to show up at the top, and the picture right below. How should I go about this? I have been playing around with putting my custom view in a linear layout and then setting android:orientation = horizontal but I don't think that works like I think it does.

My activity_main.xml file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <RadioGroup
        android:id="@+id/greyorcolor"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/grey"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Greyscale" />

        <RadioButton
            android:id="@+id/color"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Color" />
    </RadioGroup>

    <RadioGroup
        android:id="@+id/smallorlarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/large"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Large" />

        <RadioButton
            android:id="@+id/small"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Small" />
    </RadioGroup>
</LinearLayout>


    <edu.berkeley.cs160.opalkale.prog2.DrawingView
        android:id="@+id/drawing"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_marginBottom="3dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="3dp"
        android:layout_weight="1"
        android:orientation="vertical"
        android:src="@drawable/crayon" />


</LinearLayout>