Find the child location in the HorizontalScrollView and select it

It seems like I cannot get or set any position or amount of scroll in my simple layout:

// Relative layout - main_layout
<HorizontalScrollView
    android:id="@+id/MenuScroll"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true"
    android:scrollbars="none" >

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="48dp"
        android:orientation="horizontal"
        android:layout_gravity="center"
        android:padding="0dp" >

        <Button
            android:id="@+id/button1"
            android:layout_width="150dp"
            android:layout_height="fill_parent" />

        <Button
            android:id="@+id/button2"
            android:layout_width="150dp"
            android:layout_height="fill_parent" />

        <Button
            android:id="@+id/button3"
            android:layout_width="150dp"
            android:layout_height="fill_parent" />

        <Button
            android:id="@+id/button4"
            android:layout_width="150dp"
            android:layout_height="fill_parent" />

        <Button
            android:id="@+id/button5"
            android:layout_width="150dp"
            android:layout_height="fill_parent" />

    </LinearLayout>
</HorizontalScrollView>
// End of RelativeLayout - main_layout

In mine, MainActivityI want to get the position of any button inside HorizontalScrollViewand scroll it to this position. At the moment, I can’t get the left value (always 0), and if I try scrollTo HorizontalScrollView, it just doesn’t, no matter what the value is for x or y.

// imports
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main_layout);

        final Button button3 = (Button)findViewById(R.id.button3);
        Rect rectf = new Rect();
        button3.getLocalVisibleRect(rectf);
        Log.i("Left: ", String.valueOf(rectf.left)); // it is always 0

        HorizontalScrollView MenuScroll = (HorizontalScrollView)findViewById(R.id.MenuScroll);
        // Trying to scroll to X=100 but it doesn't
        MenuScroll.scrollTo(100, MenuScroll.getBottom());
    }
}

So, as I said, I can’t get the left position for my button, and either I can go to some X position in mine HorizontalScrollView. Is it possible?