Listview not scrolling in android Custom layout

Question

I am using a custom layout for having rounded corners.Please find the code for the custom layout.

public class RoundedCornerLayout extends FrameLayout {
    private final static float CORNER_RADIUS = 20.0f;

    private Bitmap maskBitmap;
    private Paint paint, maskPaint;
    private float cornerRadius;

    public RoundedCornerLayout(Context context) {
        super(context);
        init(context, null, 0);
    }

    public RoundedCornerLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs, 0);
    }

    public RoundedCornerLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs, defStyle);
    }

    private void init(Context context, AttributeSet attrs, int defStyle) {
        DisplayMetrics metrics = context.getResources().getDisplayMetrics();
        cornerRadius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, CORNER_RADIUS, metrics);

        paint = new Paint(Paint.ANTI_ALIAS_FLAG);

        maskPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
        maskPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));

        setWillNotDraw(false);
    }

    @Override
    public void draw(Canvas canvas) {
        Bitmap offscreenBitmap = Bitmap.createBitmap(canvas.getWidth(), canvas.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas offscreenCanvas = new Canvas(offscreenBitmap);

        super.draw(offscreenCanvas);

        if (maskBitmap == null) {
            maskBitmap = createMask(canvas.getWidth(), canvas.getHeight());
        }

        offscreenCanvas.drawBitmap(maskBitmap, 0f, 0f, maskPaint);
        canvas.drawBitmap(offscreenBitmap, 0f, 0f, paint);
    }

    private Bitmap createMask(int width, int height) {
        Bitmap mask = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
        Canvas canvas = new Canvas(mask);

        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setColor(Color.WHITE);

        canvas.drawRect(0, 0, width, height, paint);

        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
        canvas.drawRoundRect(new RectF(0, 0, width, height), cornerRadius, cornerRadius, paint);

        return mask;
    }
}

I have included a ListView inside this layout. But the ListView is not scrolling when added inside this layout. But if I change the layout to a FrameLayout the ListView scroll will work.

The XML layout I am using,

<com.mob.utils.RoundedCornerLayout 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"
    ">


    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#E8E9E8">

        <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="60dp"
            android:background="#F9B541">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Select Recepients"
                android:textColor="#ffffff"
                android:textSize="8pt"
                android:id="@+id/textView9"
                android:layout_centerVertical="true"
                android:layout_centerHorizontal="true" />
        </RelativeLayout>
        <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center">
            <info.hoang8f.android.segmented.SegmentedGroup
                android:id="@+id/friendSegmented"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"
                android:orientation="horizontal"
                android:layout_centerInParent="true">

                <RadioButton
                    android:id="@+id/rdBtn_Facebook"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Facebook"
                    style="@style/RadioButton" />

                <RadioButton
                    android:id="@+id/rdBtn_Email"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Email"
                    style="@style/RadioButton" />
            </info.hoang8f.android.segmented.SegmentedGroup>
            </RelativeLayout>

        <LinearLayout
            android:id="@+id/recepientContainer"
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"></LinearLayout>

    </LinearLayout>
</com.mob.utils.RoundedCornerLayout>

How to fix this?

Thanks