how to display scrollView already scrolled 20% on startup of activity

I have made an android activity in that i have put a scrollView,Now i want that when i open the activity,It should alreay scrolled up to 20% ,But it should be scrolled down after that,I have tried so many links and refrences for that,But i am failed to do that,Can anyone please help me how can i do it,My xml code is as below for scrollview,I have put image,I want scrollview show already scrolled to some fixed height on startup of activity.

main.xml

 <ScrollView
        android:id="@+id/scr_profile"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:fillViewport="true"
        android:scrollY="200dp"
        android:scrollbars="none" >

        <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" >
......

</ScrollView>

Solution

Have you try Runnable?

        final ScrollView scroll = (ScrollView) this.findViewById(R.id.scr_profile);

    scroll.post(new Runnable() {
        @Override
        public void run() {
            scroll.scrollTo(200, 200);
        } 
    });

this does work for me.