Android Studio – How to make the lower navigation bar show what's the last thing in the activity?

I was trying to make a lower navigation bar and because the views where a lot I needed to use a scroll view but the problem is that the last element in the scroll view doesn’t appear because of the navigation bar.
so what can I do to make last element appear??
my xml code is :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="#E6E6E6"
    android:layout_height="match_parent"
    tools:context=".mainPage">
    <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="16dp"
        android:orientation="vertical">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:fontFamily="@font/lato_bold"
            android:text="Servings"
            android:textColor="@color/purple_700"
            android:textSize="20sp" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:inputType="number"
            android:id="@+id/servings"
            android:hint="Servings that you will eat"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:fontFamily="@font/lato_bold"
            android:text="grams per serving"
            android:textColor="@color/purple_700"
            android:textSize="20sp" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:inputType="number"
            android:id="@+id/grams"
            android:hint="grams per serving"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:fontFamily="@font/lato_bold"
            android:text="calories for each serving"
            android:textColor="@color/purple_700"
            android:textSize="20sp" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:inputType="number"
            android:id="@+id/calories"
            android:hint="calories for each serving"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:fontFamily="@font/lato_bold"
            android:text="meal name"
            android:textColor="@color/purple_700"
            android:textSize="20sp" />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:inputType="text"
            android:id="@+id/name"
            android:hint="type the meal name"/>
    </LinearLayout>
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:id="@+id/add"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:fontFamily="@font/lato_bold"
                android:text="Add"
                android:textSize="14sp" />
            <Button
                android:id="@+id/dont"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:fontFamily="@font/lato_bold"
                android:text="Don’t know how many calories are in this meal ?"
                android:textSize="14sp" />

        </LinearLayout>
    </LinearLayout>
    </ScrollView>
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:orientation="horizontal">

            <Button
                android:id="@+id/main_food"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:fontFamily="@font/lato_bold"
                android:text="What have you eaten today"
                android:textSize="14sp" />

            <Button
                android:id="@+id/adding_food"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:fontFamily="@font/lato_bold"
                android:text="Food Adding"
                android:textSize="14sp" />

            <Button
                android:id="@+id/profile_food"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:fontFamily="@font/lato_bold"
                android:text="Profile"
                android:textSize="14sp" />

        </LinearLayout>

</RelativeLayout>

so how can I make the last element in the scroll view because the navigaion bar is blocking it (it’s in the front of it so the last element doesn’t show.
This is an image of it and as you can see the navigation bar is in the front of the last element so it doesn’t show because of that