Android ScrollView不是从顶部开始，而是在GridView的开头

I have a problem with a ScrollView that has inside of it a personalized GridView and other tipe of views.The first time I start the Activity, the ScrollView starts at its top, but if I visit the Activity other times the ScrollView starts at the beginning of the GridView.I used the class ExpandableHeightGridView found in I have a problem with a ScrollView that has ins