ScrollView内的控件改变之后自动滚动的问题

<ScrollView
android:id="@+id/scroll"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:focusable="true"
android:focusableInTouchMode="true" >

 <!-- 上面这两行是控制scrollview
android:focusable="true"
android:focusableInTouchMode="true"
不自动的关键！ !-->

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<!-- GridView高度可变  -->
<GridView
                      android:id="@+id/gridView"
                      android:layout_width="match_parent"
                      android:layout_height="wrap_content"
                      android:horizontalSpacing="@dimen/gridview_spacing"
                      android:numColumns="3"
                      android:verticalSpacing="@dimen/gridview_spacing" />

</LinearLayout>
</LinearLayout>
</ScrollView>