Android Charts Layout

I was having some problem when trying to put a scroll view together with the chart in Android. For the chart, I am using achartengine plugin. Here is my xml layout:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dp" >

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

        <TextView
            android:id="@+id/txtDisplayAttendeeAmt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingRight="10dp"
            android:text="0"
            android:textColor="@color/lightorange"
            android:textSize="35dp"
            android:textStyle="bold" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingTop="10dp"
            android:text="people joined." />
    </LinearLayout>

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/textview_lightgrey_border" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal"
        android:weightSum="1" >

        <TextView
            android:id="@+id/txtDisplayPctMale"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.35"
            android:gravity="right"
            android:paddingRight="8dp"
            android:text="0 %"
            android:textColor="@color/lightblue"
            android:textSize="35dp"
            android:textStyle="bold" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.15"
            android:paddingTop="10dp"
            android:text="Male" />

        <TextView
            android:id="@+id/txtDisplayPctFemale"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.35"
            android:gravity="right"
            android:paddingRight="8dp"
            android:text="0 %"
            android:textColor="@color/lightpink"
            android:textSize="35dp"
            android:textStyle="bold" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.2"
            android:paddingTop="10dp"
            android:text="Female" />
    </LinearLayout>

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/textview_lightgrey_border" />

    <RelativeLayout
        android:id="@+id/chart_racesPie"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_marginTop="10dp"
        android:orientation="vertical"
        android:padding="10dp" >
    </RelativeLayout>
</LinearLayout>

</ScrollView>

I got multiple charts to put inside one activity so I have to use a scroll view. However, after I added the scroll view, the relative layout for chart at the bottom is not coming out. Only the components before the relative layout is showing. When I removed the scrollview, the chart is showing again. Any ideas?

Thanks in advance.